CustomValidator 类

定义

对输入控件执行用户定义的验证。Performs user-defined validation on an input control.

public ref class CustomValidator : System::Web::UI::WebControls::BaseValidator
public class CustomValidator : System.Web.UI.WebControls.BaseValidator
type CustomValidator = class
    inherit BaseValidator
Public Class CustomValidator
Inherits BaseValidator
继承

示例

下面的代码示例演示如何创建服务器端CustomValidator控件。The following code example demonstrates how to create a server-side CustomValidator control.

重要

此示例具有一个接受用户输入的文本框,这是一个潜在的安全威胁。This example has a text box that accepts user input, which is a potential security threat. 默认情况下,ASP.NET 网页验证用户输入是否不包含脚本或 HTML 元素。By default, ASP.NET Web pages validate that user input does not include script or HTML elements. 有关详细信息,请参阅脚本侵入概述For more information, see Script Exploits Overview.


<%@ Page Language="C#" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>CustomValidator ServerValidate Example</title>
<script runat="server">

      void ValidateBtn_OnClick(object sender, EventArgs e) 
      { 

         // Display whether the page passed validation.
         if (Page.IsValid) 
         {

            Message.Text = "Page is valid.";

         }

         else 
         {

            Message.Text = "Page is not valid!";

         }

      }

      void ServerValidation(object source, ServerValidateEventArgs args)
      {

         try 
         {

            // Test whether the value entered into the text box is even.
            int i = int.Parse(args.Value);
            args.IsValid = ((i%2) == 0);

         }

         catch(Exception ex)
         {

            args.IsValid = false;

         }

      }

   </script>    

</head>
<body>

   <form id="form1" runat="server">
  
      <h3>CustomValidator ServerValidate Example</h3>

      <asp:Label id="Message"  
           Text="Enter an even number:" 
           Font-Names="Verdana" 
           Font-Size="10pt" 
           runat="server"
           AssociatedControlID="Text1"/>

      <br />

      <asp:TextBox id="Text1" 
           runat="server" />
    
      &nbsp;&nbsp;

      <asp:CustomValidator id="CustomValidator1"
           ControlToValidate="Text1"
           Display="Static"
           ErrorMessage="Not an even number!"
           ForeColor="green"
           Font-Names="verdana" 
           Font-Size="10pt"
           OnServerValidate="ServerValidation"
           runat="server"/>

      <br />
 
      <asp:Button id="Button1"
           Text="Validate" 
           OnClick="ValidateBtn_OnClick" 
           runat="server"/>

   </form>
  
</body>
</html>


<%@ Page Language="VB" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>CustomValidator ServerValidate Example</title>
<script runat="server">

      Sub ValidateBtn_OnClick(sender As Object, e As EventArgs) 

         ' Display whether the page passed validation.
         If Page.IsValid Then 

            Message.Text = "Page is valid."

         Else 

            Message.Text = "Page is not valid!"

         End If

      End Sub

      Sub ServerValidation(source As Object, args As ServerValidateEventArgs)

         Try 

            ' Test whether the value entered into the text box is even.
            Dim num As Integer = Integer.Parse(args.Value)
            args.IsValid = ((num mod 2) = 0)
 
         Catch ex As Exception
         
            args.IsValid = false

         End Try

      End Sub

   </script>    

</head>
<body>

   <form id="form1" runat="server">
  
      <h3>CustomValidator ServerValidate Example</h3>

      <asp:Label id="Message"
           Text="Enter an even number:" 
           Font-Names="Verdana" 
           Font-Size="10pt" 
           runat="server"
           AssociatedControlID="Text1" />

      <br />

      <asp:TextBox id="Text1" 
           runat="server" />
    
      &nbsp;&nbsp;

      <asp:CustomValidator id="CustomValidator1"
           ControlToValidate="Text1"
           Display="Static"
           ErrorMessage="Not an even number!"
           ForeColor="green"
           Font-Names="verdana" 
           Font-Size="10pt"
           OnServerValidate="ServerValidation"
           runat="server"/>

      <br />
 
      <asp:Button id="Button1"
           Text="Validate" 
           OnClick="ValidateBtn_OnClick" 
           runat="server"/>

   </form>
  
</body>
</html>

下面的代码示例演示如何创建客户CustomValidator端控件。The following code example demonstrates how to create a client-side CustomValidator control.

<%@ Page Language="C#" AutoEventWireup="True" %>

<html>
<head>

   <script runat="server">

      void ValidateBtn_OnClick(object sender, EventArgs e) 
      { 
         // Display whether the page passed validation.
         if (Page.IsValid) 
         {
            Message.Text = "Page is valid.";
         }

         else 
         {
            Message.Text = "Page is not valid!";
         }
      }

      void ServerValidation(object source, ServerValidateEventArgs args)
      {
         try 
         {
            // Test whether the value entered into the text box is even.
            int i = int.Parse(args.Value);
            args.IsValid = ((i%2) == 0);
         }

         catch(Exception ex)
         {
            args.IsValid = false;
         }
      }
       
   </script>    

</head>
<body>

   <form id="Form1" runat="server">
  
      <h3>CustomValidator ServerValidate Example</h3>

      <asp:Label id="Message"  
           Text="Enter an even number:" 
           Font-Name="Verdana" 
           Font-Size="10pt" 
           runat="server"/>

      <p>

      <asp:TextBox id="Text1" 
           runat="server" />
    
      &nbsp;&nbsp;

      <asp:CustomValidator id="CustomValidator1"
           ControlToValidate="Text1"
           ClientValidationFunction="ClientValidate"
           OnServerValidate="ServerValidation"
           Display="Static"
           ErrorMessage="Not an even number!"
           ForeColor="green"
           Font-Name="verdana" 
           Font-Size="10pt"
           runat="server"/>

      <p>
 
      <asp:Button id="Button1"
           Text="Validate" 
           OnClick="ValidateBtn_OnClick" 
           runat="server"/>

   </form>
</body>
</html>

<script language="javascript"> 
   function ClientValidate(source, arguments)
   {
        if (arguments.Value % 2 == 0 ){
            arguments.IsValid = true;
        } else {
            arguments.IsValid = false;
        }
   }
</script>
<%@ Page Language="VB" AutoEventWireup="True" %>

<html>
<head>

   <script runat="server">

      Sub ValidateBtn_OnClick(sender As Object, e As EventArgs) 
           ' Display whether the page passed validation.
           If Page.IsValid Then
               Message.Text = "Page is valid."
           Else
               Message.Text = "Page is not valid!"
           End If
       End Sub

      Sub ServerValidation(source As Object, args As ServerValidateEventArgs)
           Try
               ' Test whether the value entered into the text box is even.
               Dim num As Integer = Integer.Parse(args.Value)
               args.IsValid = ((num Mod 2) = 0)
           Catch ex As Exception
               args.IsValid = False
           End Try
       End Sub

   </script>      

</head>
<body>

   <form id="Form1" runat="server">
  
      <h3>CustomValidator ServerValidate Example</h3>

      <asp:Label id="Message"  
           Text="Enter an even number:" 
           Font-Name="Verdana" 
           Font-Size="10pt" 
           runat="server"/>

      <p>

      <asp:TextBox id="Text1" 
           runat="server" />
    
      &nbsp;&nbsp;

      <asp:CustomValidator id="CustomValidator1"
           ControlToValidate="Text1"
           ClientValidationFunction="ClientValidate"
           OnServerValidate="ServerValidation"
           Display="Static"
           ErrorMessage="Not an even number!"
           ForeColor="green"
           Font-Name="verdana" 
           Font-Size="10pt"
           runat="server"/>

      <p>
 
      <asp:Button id="Button1"
           Text="Validate" 
           OnClick="ValidateBtn_OnClick" 
           runat="server"/>

   </form>
  
</body>
</html>

<script language="javascript">
   function ClientValidate(source, arguments)
   {
        if (arguments.Value % 2 == 0 ){
            arguments.IsValid = true;
        } else {
            arguments.IsValid = false;
        }
   }
</script>

注解

CustomValidator使用控件为输入控件提供用户定义的验证函数。Use the CustomValidator control to provide a user-defined validation function for an input control. CustomValidator控件是一个独立于它所验证的输入控件的控件, 它允许您控制验证消息的显示位置。The CustomValidator control is a separate control from the input control it validates, which allows you to control where the validation message is displayed.

验证控件始终在服务器上执行验证。Validation controls always perform validation on the server. 它们还具有完整的客户端实现, 使得启用脚本的浏览器 (如 Microsoft Internet Explorer 4.0 和更高版本) 可以在客户端上执行验证。They also have complete client-side implementation that allows script-enabled browsers (such as Microsoft Internet Explorer 4.0 and later) to perform validation on the client. 客户端验证通过在将用户输入发送到服务器之前检查用户输入来增强验证过程。Client-side validation enhances the validation process by checking user input before it is sent to the server. 这允许在提交窗体前在客户端上检测到错误, 从而避免了服务器端验证所需的信息的往返过程。This allows errors to be detected on the client before the form is submitted, thus avoiding the round trip of information necessary for server-side validation.

若要创建服务器端验证函数, 请提供执行验证的ServerValidate事件的处理程序。To create a server-side validation function, provide a handler for the ServerValidate event that performs the validation. 可以通过使用作为参数传递到事件处理程序中的Value ServerValidateEventArgs对象的属性来访问要验证的输入控件中的字符串。The string from the input control to validate can be accessed by using the Value property of the ServerValidateEventArgs object passed into the event handler as a parameter. 然后, 验证的结果存储在IsValid ServerValidateEventArgs对象的属性中。The result of the validation is then stored in the IsValid property of the ServerValidateEventArgs object.

若要创建客户端验证函数, 请首先添加前面介绍的服务器端验证函数。To create a client-side validation function, first add the server-side validation function described earlier. 接下来, 将客户端验证脚本函数添加到 ASP.NET (.aspx) 页。Next, add the client-side validation script function to the ASP.NET (.aspx) page.

如果使用 Visual Basic Scripting Edition (VBScript), 则该函数必须采用以下格式:If you are using Visual Basic Scripting Edition (VBScript), the function must be in this form:

Sub ValidationFunctionName(source, arguments)  

如果你使用的是 JScript, 则该函数必须采用以下格式:If you are using JScript, the function must be in this form:

function ValidationFunctionName(source, arguments)  

参数是对为CustomValidator控件呈现的跨度>元素的引用。< sourceThe source parameter is a reference to the <span> element rendered for the CustomValidator control. 这允许你以编程方式控制<范围 > 标记, 如InnerHtml修改属性。This allows you to programmatically control the <span> tag, such as modifying the InnerHtml attribute. arguments参数是具有两个属性的对象:值和 IsValid。The arguments parameter is an object with two properties: Value and IsValid. 此参数允许你获取控件的值以便验证, 并根据自定义验证例程指示该值是否有效。This parameter allows you to get the value of the control to validate and to indicate whether the value is valid based on your custom validation routine.

使用属性指定CustomValidator与控件关联的客户端验证脚本函数的名称。 ClientValidationFunctionUse the ClientValidationFunction property to specify the name of the client-side validation script function associated with the CustomValidator control. 由于脚本函数是在客户端上执行的, 因此该函数必须采用目标浏览器支持的语言, 如 VBScript 或 JScript。Because the script function is executed on the client, the function must be in a language that the target browser supports, such as VBScript or JScript.

备注

CustomValidator 控件UpdatePanel内使用控件时, 请确保验证程序控件及其关联的控件位于同一面板中。When you use the CustomValidator control inside an UpdatePanel control, make sure that the validator control and the control it is associated with are in the same panel. 有关将UpdatePanel控件用于部分页面更新的详细信息, 请参阅部分页呈现概述For more information about using the UpdatePanel control for partial-page updates, see Partial-Page Rendering Overview.

与服务器端验证一样, 通过使用Value arguments参数的属性访问要验证的输入控件中的字符串。Like server-side validation, the string from the input control to validate is accessed by using the Value property of the arguments parameter. 通过设置IsValid arguments参数的属性, 返回验证的结果。Return the result of the validation by setting the IsValid property of the arguments parameter.

注意

使用验证程序控件时, 应始终检查服务器端验证的结果, 然后再执行任何处理。When using validator controls, you should always check the results of server-side validation before performing any processing. 在回发之后但在调用事件方法之前, 页面调用验证程序控件并将其结果聚合到Page.IsValid属性中。After a postback but before your event methods are called, the page calls the validator controls and aggregates their results into the Page.IsValid property. (也可以使用Validate方法显式调用验证程序控件。)在您自己的代码中, 应检查Page.IsValid属性是否在处理输入之前返回。 true(You can also call the validator controls explicitly using the Validate method.) In your own code, you should check that the Page.IsValid property returns true before processing input. 即使启用了脚本的浏览器可能会阻止在验证检查失败的情况下在客户端上发生回发, 还应Page.IsValid始终在处理验证的数据之前签入服务器代码。Even though script-enabled browsers might prevent a postback from occurring on the client if a validation check has failed, you should always also check Page.IsValid in server code before processing validated data.

多个验证控件可以与单个输入控件一起用于验证不同的条件。Multiple validation controls can be used with an individual input control to validate different criteria. 例如, 您可以对TextBox控件应用多个验证控件, 使用户能够输入要添加到购物车中的项目的数量。For example, you can apply multiple validation controls on a TextBox control that allows the user to enter the quantity of items to add to a shopping cart. 您可以使用CustomValidator控件来确保指定的值小于库存量RequiredFieldValidator和控件以确保用户在TextBox控件中输入值。You can use a CustomValidator control to ensure that the value specified is less than the amount in inventory and a RequiredFieldValidator control to ensure that the user enters a value into the TextBox control.

备注

如果输入控件为空, 则不会调用任何验证函数, 验证将成功。If the input control is empty, no validation functions are called and validation succeeds. RequiredFieldValidator使用控件要求用户在输入控件中输入数据。Use a RequiredFieldValidator control to require the user to enter data in the input control.

可以使用CustomValidator控件而不ControlToValidate设置属性。It is possible to use a CustomValidator control without setting the ControlToValidate property. 当验证多个输入控件或验证不能用于验证控件 (如CheckBox控件) 的输入控件时, 通常会执行此操作。This is commonly done when you are validating multiple input controls or validating input controls that cannot be used with validation controls, such as the CheckBox control. 在这种情况下Value , 传递给arguments ServerValidate事件的事件处理程序和客户端验证函数的参数的属性始终包含空字符串 ("")。In this case, the Value property of the arguments parameter passed to the event handler for the ServerValidate event and to the client-side validation function always contains an empty string (""). 但是, 在适当的情况下, 仍会调用这些验证函数来确定服务器和客户端上的有效性。However, these validation functions are still called, where appropriate, to determine validity on both the server and client. 若要访问要验证的值, 必须以编程方式引用要验证的输入控件, 然后从相应的属性中检索值。To access the value to validate, you must programmatically reference the input control you want to validate and then retrieve the value from the appropriate property. 例如, 若要验证服务器CheckBox上的控件, 请不要ControlToValidate设置验证控件的属性, 并为ServerValidate事件的处理程序使用以下代码。For example, to validate a CheckBox control on the server, do not set the ControlToValidate property of the validation control and use the following code for the handler for the ServerValidate event.

Sub ServerValidation (source As object, args As ServerValidateEventArgs)  
    args.IsValid = (CheckBox1.Checked = True)  
 End Sub  
void ServerValidation (object source, ServerValidateEventArgs args)  
 {  
    args.IsValid = (CheckBox1.Checked == true);  
 }  

有关验证控件的详细信息, 请BaseValidator参阅。For more information on validation controls, see BaseValidator.

可访问性Accessibility

有关如何配置此控件以生成符合辅助功能标准的标记的信息, 请参阅Visual Studio 中的辅助功能和 ASP.NETASP.NET 控件和辅助功能For information about how to configure this control so that it generates markup that conforms to accessibility standards, see Accessibility in Visual Studio and ASP.NET and ASP.NET Controls and Accessibility.

构造函数

CustomValidator()

初始化 CustomValidator 类的新实例。Initializes a new instance of the CustomValidator class.

属性

AccessKey

获取或设置使您得以快速导航到 Web 服务器控件的访问键。Gets or sets the access key that allows you to quickly navigate to the Web server control.

(继承自 WebControl)
Adapter

获取控件的浏览器特定适配器。Gets the browser-specific adapter for the control.

(继承自 Control)
AppRelativeTemplateSourceDirectory

获取或设置包含该控件的 PageUserControl 对象的应用程序相对虚拟目录。Gets or sets the application-relative virtual directory of the Page or UserControl object that contains this control.

(继承自 Control)
AssociatedControlID

不支持此属性。This property is not supported.

(继承自 BaseValidator)
Attributes

获取与控件的特性不对应的任意特性(只用于呈现)的集合。Gets the collection of arbitrary attributes (for rendering only) that do not correspond to properties on the control.

(继承自 WebControl)
BackColor

获取或设置 Web 服务器控件的背景色。Gets or sets the background color of the Web server control.

(继承自 WebControl)
BindingContainer

获取包含该控件的数据绑定的控件。Gets the control that contains this control's data binding.

(继承自 Control)
BorderColor

获取或设置 Web 控件的边框颜色。Gets or sets the border color of the Web control.

(继承自 WebControl)
BorderStyle

获取或设置 Web 服务器控件的边框样式。Gets or sets the border style of the Web server control.

(继承自 WebControl)
BorderWidth

获取或设置 Web 服务器控件的边框宽度。Gets or sets the border width of the Web server control.

(继承自 WebControl)
ChildControlsCreated

获取一个值,该值指示是否已创建服务器控件的子控件。Gets a value that indicates whether the server control's child controls have been created.

(继承自 Control)
ClientID

获取由 ASP.NET 生成的 HTML 标记的控件 ID。Gets the control ID for HTML markup that is generated by ASP.NET.

(继承自 Control)
ClientIDMode

获取或设置用于生成 ClientID 属性值的算法。Gets or sets the algorithm that is used to generate the value of the ClientID property.

(继承自 Control)
ClientIDSeparator

获取一个字符值,该值表示 ClientID 属性中使用的分隔符字符。Gets a character value representing the separator character used in the ClientID property.

(继承自 Control)
ClientValidationFunction

获取或设置用于验证的自定义客户端脚本函数的名称。Gets or sets the name of the custom client-side script function used for validation.

Context

为当前 Web 请求获取与服务器控件关联的 HttpContext 对象。Gets the HttpContext object associated with the server control for the current Web request.

(继承自 Control)
Controls

获取 ControlCollection 对象,该对象表示 UI 层次结构中的指定服务器控件的子控件。Gets a ControlCollection object that represents the child controls for a specified server control in the UI hierarchy.

(继承自 Control)
ControlStyle

获取 Web 服务器控件的样式。Gets the style of the Web server control. 此属性主要由控件开发人员使用。This property is used primarily by control developers.

(继承自 WebControl)
ControlStyleCreated

获取一个值,该值指示是否已为 Style 属性创建了 ControlStyle 对象。Gets a value indicating whether a Style object has been created for the ControlStyle property. 此属性主要由控件开发人员使用。This property is primarily used by control developers.

(继承自 WebControl)
ControlToValidate

获取或设置要验证的输入控件。Gets or sets the input control to validate.

(继承自 BaseValidator)
CssClass

获取或设置由 Web 服务器控件在客户端呈现的级联样式表 (CSS) 类。Gets or sets the Cascading Style Sheet (CSS) class rendered by the Web server control on the client.

(继承自 WebControl)
DataItemContainer

如果命名容器实现 IDataItemContainer,则获取对命名容器的引用。Gets a reference to the naming container if the naming container implements IDataItemContainer.

(继承自 Control)
DataKeysContainer

如果命名容器实现 IDataKeysControl,则获取对命名容器的引用。Gets a reference to the naming container if the naming container implements IDataKeysControl.

(继承自 Control)
DesignMode

获取一个值,该值指示是否正在使用设计图面上的一个控件。Gets a value indicating whether a control is being used on a design surface.

(继承自 Control)
Display

获取或设置验证控件中错误消息的显示行为。Gets or sets the display behavior of the error message in a validation control.

(继承自 BaseValidator)
EnableClientScript

获取或设置一个值,该值指示是否启用客户端验证。Gets or sets a value indicating whether client-side validation is enabled.

(继承自 BaseValidator)
Enabled

获取或设置一个值,该值指示是否启用验证控件。Gets or sets a value that indicates whether the validation control is enabled.

(继承自 BaseValidator)
EnableTheming

获取或设置一个值,该值指示主题是否应用于该控件。Gets or sets a value indicating whether themes apply to this control.

(继承自 WebControl)
EnableViewState

获取或设置一个值,该值指示服务器控件是否向发出请求的客户端保持自己的视图状态以及它所包含的任何子控件的视图状态。Gets or sets a value indicating whether the server control persists its view state, and the view state of any child controls it contains, to the requesting client.

(继承自 Control)
ErrorMessage

获取或设置验证失败时 ValidationSummary 控件中显示的错误消息的文本。Gets or sets the text for the error message displayed in a ValidationSummary control when validation fails.

(继承自 BaseValidator)
Events

获取控件的事件处理程序委托列表。Gets a list of event handler delegates for the control. 此属性是只读的。This property is read-only.

(继承自 Control)
Font

获取与 Web 服务器控件关联的字体属性。Gets the font properties associated with the Web server control.

(继承自 WebControl)
ForeColor

获取或设置验证失败后显示的消息的颜色。Gets or sets the color of the message displayed when validation fails.

(继承自 BaseValidator)
HasAttributes

获取一个值,该值指示控件是否具有特性集。Gets a value indicating whether the control has attributes set.

(继承自 WebControl)
HasChildViewState

获取一个值,该值指示当前服务器控件的子控件是否具有任何已保存的视图状态设置。Gets a value indicating whether the current server control's child controls have any saved view-state settings.

(继承自 Control)
Height

获取或设置 Web 服务器控件的高度。Gets or sets the height of the Web server control.

(继承自 WebControl)
ID

获取或设置分配给服务器控件的编程标识符。Gets or sets the programmatic identifier assigned to the server control.

(继承自 Control)
IdSeparator

获取用于分隔控件标识符的字符。Gets the character used to separate control identifiers.

(继承自 Control)
IsChildControlStateCleared

获取一个值,该值指示该控件中包含的控件是否具有控件状态。Gets a value indicating whether controls contained within this control have control state.

(继承自 Control)
IsEnabled

获取一个值,该值指示是否启用控件。Gets a value indicating whether the control is enabled.

(继承自 WebControl)
IsTrackingViewState

获取一个值,用于指示服务器控件是否会将更改保存到其视图状态中。Gets a value that indicates whether the server control is saving changes to its view state.

(继承自 Control)
IsUnobtrusive

获取一个值,该值指示控件是否生成非介入式 JavaScript。Gets a value that indicates whether the control generates unobtrusive JavaScript.

(继承自 BaseValidator)
IsValid

获取或设置一个值,该值指示关联的输入控件是否通过验证。Gets or sets a value that indicates whether the associated input control passes validation.

(继承自 BaseValidator)
IsViewStateEnabled

获取一个值,该值指示是否为该控件启用了视图状态。Gets a value indicating whether view state is enabled for this control.

(继承自 Control)
LoadViewStateByID

获取一个值,该值指示控件是否通过 ID 而不是索引参与加载其视图状态。Gets a value indicating whether the control participates in loading its view state by ID instead of index.

(继承自 Control)
NamingContainer

获取对服务器控件的命名容器的引用,此引用创建唯一的命名空间,以区分具有相同 ID 属性值的服务器控件。Gets a reference to the server control's naming container, which creates a unique namespace for differentiating between server controls with the same ID property value.

(继承自 Control)
Page

获取对包含服务器控件的 Page 实例的引用。Gets a reference to the Page instance that contains the server control.

(继承自 Control)
Parent

获取对页 UI 层次结构中服务器控件的父控件的引用。Gets a reference to the server control's parent control in the page control hierarchy.

(继承自 Control)
PropertiesValid

获取一个值,该值指示由 ControlToValidate 属性指定的控件是否是有效的控件。Gets a value that indicates whether the control specified by the ControlToValidate property is a valid control.

(继承自 BaseValidator)
RenderingCompatibility

获取一个值,该值指定呈现的 HTML 将与之兼容的 ASP.NET 版本。Gets a value that specifies the ASP.NET version that rendered HTML will be compatible with.

(继承自 Control)
RenderUplevel

获取一个值,该值指示客户端的浏览器是否支持“上一级”呈现。Gets a value that indicates whether the client's browser supports "uplevel" rendering.

(继承自 BaseValidator)
SetFocusOnError

获取或设置一个值,该值指示在验证失败时是否将焦点设置到 ControlToValidate 属性指定的控件上。Gets or sets a value that indicates whether focus is set to the control specified by the ControlToValidate property when validation fails.

(继承自 BaseValidator)
Site

获取容器信息,该容器在呈现于设计图面上时承载当前控件。Gets information about the container that hosts the current control when rendered on a design surface.

(继承自 Control)
SkinID

获取或设置要应用于控件的外观。Gets or sets the skin to apply to the control.

(继承自 WebControl)
Style

获取将在 Web 服务器控件的外部标记上呈现为样式特性的文本特性的集合。Gets a collection of text attributes that will be rendered as a style attribute on the outer tag of the Web server control.

(继承自 WebControl)
SupportsDisabledAttribute

获取一个值,该值指示在控件的 IsEnabled 属性为 disabled 时,控件是否应将呈现的 HTML 元素的 false 特性设置为“disabled”。Gets a value that indicates whether the control should set the disabled attribute of the rendered HTML element to "disabled" when the control's IsEnabled property is false.

(继承自 Label)
TabIndex

获取或设置 Web 服务器控件的选项卡索引。Gets or sets the tab index of the Web server control.

(继承自 WebControl)
TagKey

获取用于呈现 Label 控件的 HTML 标记。Gets the HTML tag that is used to render the Label control.

(继承自 Label)
TagName

获取控件标记的名称。Gets the name of the control tag. 此属性主要由控件开发人员使用。This property is used primarily by control developers.

(继承自 WebControl)
TemplateControl

获取或设置对包含该控件的模板的引用。Gets or sets a reference to the template that contains this control.

(继承自 Control)
TemplateSourceDirectory

获取包含当前服务器控件的 PageUserControl 的虚拟目录。Gets the virtual directory of the Page or UserControl that contains the current server control.

(继承自 Control)
Text

获取或设置验证失败时验证控件中显示的文本。Gets or sets the text displayed in the validation control when validation fails.

(继承自 BaseValidator)
ToolTip

获取或设置当鼠标指针悬停在 Web 服务器控件上时显示的文本。Gets or sets the text displayed when the mouse pointer hovers over the Web server control.

(继承自 WebControl)
UniqueID

获取服务器控件的唯一的、以分层形式限定的标识符。Gets the unique, hierarchically qualified identifier for the server control.

(继承自 Control)
ValidateEmptyText

获取或设置一个布尔值,该值指示是否应该验证空文本。Gets or sets a Boolean value indicating whether empty text should be validated.

ValidateRequestMode

获取或设置指示控件是否检查来自浏览器的客户端输入是否具有潜在危险值的值。Gets or sets a value that indicates whether the control checks client input from the browser for potentially dangerous values.

(继承自 Control)
ValidationGroup

获取或设置此验证控件所属的验证组的名称。Gets or sets the name of the validation group to which this validation control belongs.

(继承自 BaseValidator)
ViewState

获取状态信息的字典,这些信息使您可以在同一页的多个请求间保存和还原服务器控件的视图状态。Gets a dictionary of state information that allows you to save and restore the view state of a server control across multiple requests for the same page.

(继承自 Control)
ViewStateIgnoresCase

获取一个值,该值指示 StateBag 对象是否不区分大小写。Gets a value that indicates whether the StateBag object is case-insensitive.

(继承自 Control)
ViewStateMode

获取或设置此控件的视图状态模式。Gets or sets the view-state mode of this control.

(继承自 Control)
Visible

获取或设置一个值,该值指示服务器控件是否作为 UI 呈现在页上。Gets or sets a value that indicates whether a server control is rendered as UI on the page.

(继承自 Control)
Width

获取或设置 Web 服务器控件的宽度。Gets or sets the width of the Web server control.

(继承自 WebControl)

方法

AddAttributesToRender(HtmlTextWriter)

CustomValidator 控件的属性添加到输出流以便在客户端上呈现。Adds the properties of the CustomValidator control to the output stream for rendering on the client.

AddedControl(Control, Int32)

在子控件添加到 Control 对象的 Controls 集合后调用。Called after a child control is added to the Controls collection of the Control object.

(继承自 Control)
AddParsedSubObject(Object)

通知控件某元素已经过分析,并将该元素添加到 Label 控件。Notifies the control that an element was parsed and adds the element to the Label control.

(继承自 Label)
ApplyStyle(Style)

将指定样式的所有非空白元素复制到 Web 控件,覆盖控件的所有现有的样式元素。Copies any nonblank elements of the specified style to the Web control, overwriting any existing style elements of the control. 此方法主要由控件开发人员使用。This method is primarily used by control developers.

(继承自 WebControl)
ApplyStyleSheetSkin(Page)

将页样式表中定义的样式属性应用到控件。Applies the style properties defined in the page style sheet to the control.

(继承自 Control)
BeginRenderTracing(TextWriter, Object)

开始输出数据的设计时追踪。Begins design-time tracing of rendering data.

(继承自 Control)
BuildProfileTree(String, Boolean)

收集有关服务器控件的信息并将该信息发送到 Trace 属性,在启用页的跟踪功能时将显示该属性。Gathers information about the server control and delivers it to the Trace property to be displayed when tracing is enabled for the page.

(继承自 Control)
CheckControlValidationProperty(String, String)

验证指定的控件是否在页面上并且是否包含验证属性。Verifies whether the specified control is on the page and contains validation properties.

(继承自 BaseValidator)
ClearCachedClientID()

将缓存的 ClientID 值设置为 nullSets the cached ClientID value to null.

(继承自 Control)
ClearChildControlState()

删除服务器控件的子控件的控件状态信息。Deletes the control-state information for the server control's child controls.

(继承自 Control)
ClearChildState()

删除服务器控件的所有子控件的视图状态和控件状态信息。Deletes the view-state and control-state information for all the server control's child controls.

(继承自 Control)
ClearChildViewState()

删除服务器控件的所有子控件的视图状态信息。Deletes the view-state information for all the server control's child controls.

(继承自 Control)
ClearEffectiveClientIDMode()

将当前控件实例和任何子控件的 ClientIDMode 属性设置为 InheritSets the ClientIDMode property of the current control instance and of any child controls to Inherit.

(继承自 Control)
ControlPropertiesValid()

检查有效值的控件属性。Checks the properties of the control for valid values.

CopyBaseAttributes(WebControl)

Style 对象未封装的属性从指定的 Web 服务器控件复制到从中调用此方法的 Web 服务器控件。Copies the properties not encapsulated by the Style object from the specified Web server control to the Web server control that this method is called from. 此方法主要由控件开发人员使用。This method is used primarily by control developers.

(继承自 WebControl)
CreateChildControls()

由 ASP.NET 页框架调用,以通知服务器控件在准备回发或呈现时使用基于撰写的实现来创建其所包含任何子控件。Called by the ASP.NET page framework to notify server controls that use composition-based implementation to create any child controls they contain in preparation for posting back or rendering.

(继承自 Control)
CreateControlCollection()

创建一个新 ControlCollection 对象来保存服务器控件的子控件(包括文本控件和服务器控件)。Creates a new ControlCollection object to hold the child controls (both literal and server) of the server control.

(继承自 Control)
CreateControlStyle()

创建由 WebControl 类在内部用来实现所有与样式有关的属性的样式对象。Creates the style object that is used internally by the WebControl class to implement all style related properties. 此方法主要由控件开发人员使用。This method is used primarily by control developers.

(继承自 WebControl)
DataBind()

将数据源绑定到调用的服务器控件及其所有子控件。Binds a data source to the invoked server control and all its child controls.

(继承自 Control)
DataBind(Boolean)

将数据源绑定到调用的服务器控件及其所有子控件,同时可以选择引发 DataBinding 事件。Binds a data source to the invoked server control and all its child controls with an option to raise the DataBinding event.

(继承自 Control)
DataBindChildren()

将数据源绑定到服务器控件的子控件。Binds a data source to the server control's child controls.

(继承自 Control)
DetermineRenderUplevel()

确定验证控件是否可执行客户端验证。Determines whether the validation control can perform client-side validation.

(继承自 BaseValidator)
Dispose()

使服务器控件得以在从内存中释放之前执行最后的清理操作。Enables a server control to perform final clean up before it is released from memory.

(继承自 Control)
EndRenderTracing(TextWriter, Object)

结束输出数据的设计时追踪。Ends design-time tracing of rendering data.

(继承自 Control)
EnsureChildControls()

确定服务器控件是否包含子控件。Determines whether the server control contains child controls. 如果不包含,则创建子控件。If it does not, it creates child controls.

(继承自 Control)
EnsureID()

为尚未分配标识符的控件创建标识符。Creates an identifier for controls that do not have an identifier assigned.

(继承自 Control)
Equals(Object)

确定指定的对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(继承自 Object)
EvaluateIsValid()

重写 EvaluateIsValid() 方法。Overrides the EvaluateIsValid() method.

FindControl(String)

在当前的命名容器中搜索带指定 id 参数的服务器控件。Searches the current naming container for a server control with the specified id parameter.

(继承自 Control)
FindControl(String, Int32)

使用指定的 idpathOffset 参数(该参数有助于搜索)中指定的整数在当前命名容器中搜索服务器控件。Searches the current naming container for a server control with the specified id and an integer, specified in the pathOffset parameter, which aids in the search. 不应重写此版本的 FindControl 方法。You should not override this version of the FindControl method.

(继承自 Control)
Focus()

为控件设置输入焦点。Sets input focus to a control.

(继承自 Control)
GetControlRenderID(String)

获取指定控件的客户端 ID。Gets the client ID of the specified control.

(继承自 BaseValidator)
GetControlValidationValue(String)

获取与指定输入控件关联的值。Gets the value associated with the specified input control.

(继承自 BaseValidator)
GetDesignModeState()

获取控件的设计时数据。Gets design-time data for a control.

(继承自 Control)
GetHashCode()

用作默认哈希函数。Serves as the default hash function.

(继承自 Object)
GetRouteUrl(Object)

获取与一组路由参数对应的 URL。Gets the URL that corresponds to a set of route parameters.

(继承自 Control)
GetRouteUrl(RouteValueDictionary)

获取与一组路由参数对应的 URL。Gets the URL that corresponds to a set of route parameters.

(继承自 Control)
GetRouteUrl(String, Object)

获取与一组路由参数以及某个路由名称对应的 URL。Gets the URL that corresponds to a set of route parameters and a route name.

(继承自 Control)
GetRouteUrl(String, RouteValueDictionary)

获取与一组路由参数以及某个路由名称对应的 URL。Gets the URL that corresponds to a set of route parameters and a route name.

(继承自 Control)
GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
GetUniqueIDRelativeTo(Control)

返回指定控件的 UniqueID 属性的前缀部分。Returns the prefixed portion of the UniqueID property of the specified control.

(继承自 Control)
HasControls()

确定服务器控件是否包含任何子控件。Determines if the server control contains any child controls.

(继承自 Control)
HasEvents()

返回一个值,该值指示是否为控件或任何子控件注册事件。Returns a value indicating whether events are registered for the control or any child controls.

(继承自 Control)
IsLiteralContent()

确定服务器控件是否只包含文字内容。Determines if the server control holds only literal content.

(继承自 Control)
LoadControlState(Object)

SaveControlState() 方法保存的上一个页请求还原控件状态信息。Restores control-state information from a previous page request that was saved by the SaveControlState() method.

(继承自 Control)
LoadViewState(Object)

加载以前保存的控件的状态。Loads the previously saved state for the control.

(继承自 Label)
MapPathSecure(String)

检索虚拟路径(绝对的或相对的)映射到的物理路径。Retrieves the physical path that a virtual path, either absolute or relative, maps to.

(继承自 Control)
MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
MergeStyle(Style)

将指定样式的所有非空白元素复制到 Web 控件,但不覆盖该控件现有的任何样式元素。Copies any nonblank elements of the specified style to the Web control, but will not overwrite any existing style elements of the control. 此方法主要由控件开发人员使用。This method is used primarily by control developers.

(继承自 WebControl)
OnBubbleEvent(Object, EventArgs)

确定服务器控件的事件是否沿页的 UI 服务器控件层次结构向上传递。Determines whether the event for the server control is passed up the page's UI server control hierarchy.

(继承自 Control)
OnDataBinding(EventArgs)

引发 DataBinding 事件。Raises the DataBinding event.

(继承自 Control)
OnInit(EventArgs)

引发 Init 事件。Raises the Init event.

(继承自 BaseValidator)
OnLoad(EventArgs)

引发 Load 事件。Raises the Load event.

(继承自 Control)
OnPreRender(EventArgs)

引发 PreRender 事件。Raises the PreRender event.

(继承自 BaseValidator)
OnServerValidate(String)

ServerValidate 控件引发 CustomValidator 事件。Raises the ServerValidate event for the CustomValidator control.

OnUnload(EventArgs)

引发 Unload 事件。Raises the Unload event.

(继承自 BaseValidator)
OpenFile(String)

获取用于读取文件的 StreamGets a Stream used to read a file.

(继承自 Control)
RaiseBubbleEvent(Object, EventArgs)

将所有事件源及其信息分配给控件的父级。Assigns any sources of the event and its information to the control's parent.

(继承自 Control)
RegisterValidatorCommonScript()

在页面上注册用于客户端验证的代码。Registers code on the page for client-side validation.

(继承自 BaseValidator)
RegisterValidatorDeclaration()

使用数组名 Page_Validators 注册 ECMAScript 数组声明。Registers an ECMAScript array declaration using the array name Page_Validators.

(继承自 BaseValidator)
RemovedControl(Control)

Control 对象的 Controls 集合移除子控件后调用。Called after a child control is removed from the Controls collection of the Control object.

(继承自 Control)
Render(HtmlTextWriter)

在客户端上显示控件。Displays the control on the client.

(继承自 BaseValidator)
RenderBeginTag(HtmlTextWriter)

将控件的 HTML 开始标记呈现到指定的编写器中。Renders the HTML opening tag of the control to the specified writer. 此方法主要由控件开发人员使用。This method is used primarily by control developers.

(继承自 WebControl)
RenderChildren(HtmlTextWriter)

将服务器控件子级的内容输出到提供的 HtmlTextWriter 对象,此对象编写将在客户端呈现的内容。Outputs the content of a server control's children to a provided HtmlTextWriter object, which writes the content to be rendered on the client.

(继承自 Control)
RenderContents(HtmlTextWriter)

Label 的内容呈现到指定的编写器中。Renders the contents of the Label into the specified writer.

(继承自 Label)
RenderControl(HtmlTextWriter)

将服务器控件内容输出到所提供的 HtmlTextWriter 对象,如果启用了跟踪,则还将存储有关该控件的跟踪信息。Outputs server control content to a provided HtmlTextWriter object and stores tracing information about the control if tracing is enabled.

(继承自 Control)
RenderControl(HtmlTextWriter, ControlAdapter)

使用提供的 HtmlTextWriter 对象将服务器控件内容输出到提供的 ControlAdapter 对象。Outputs server control content to a provided HtmlTextWriter object using a provided ControlAdapter object.

(继承自 Control)
RenderEndTag(HtmlTextWriter)

将控件的 HTML 结束标记呈现到指定的编写器中。Renders the HTML closing tag of the control into the specified writer. 此方法主要由控件开发人员使用。This method is used primarily by control developers.

(继承自 WebControl)
ResolveAdapter()

获取负责呈现指定控件的控件适配器。Gets the control adapter responsible for rendering the specified control.

(继承自 Control)
ResolveClientUrl(String)

获取浏览器可以使用的 URL。Gets a URL that can be used by the browser.

(继承自 Control)
ResolveUrl(String)

将 URL 转换为在请求客户端可用的 URL。Converts a URL into one that is usable on the requesting client.

(继承自 Control)
SaveControlState()

保存将页面回发到服务器之后发生的所有服务器控件状态更改。Saves any server control state changes that have occurred since the time the page was posted back to the server.

(继承自 Control)
SaveViewState()

保存调用 TrackViewState() 方法后修改的任何状态。Saves any state that was modified after the TrackViewState() method was invoked.

(继承自 WebControl)
SetDesignModeState(IDictionary)

为控件设置设计时数据。Sets design-time data for a control.

(继承自 Control)
SetRenderMethodDelegate(RenderMethod)

分配事件处理程序委托,以将服务器控件及其内容呈现到父控件中。Assigns an event handler delegate to render the server control and its content into its parent control.

(继承自 Control)
SetTraceData(Object, Object)

使用跟踪数据键和跟踪数据值,为呈现数据的设计时追踪设置跟踪数据。Sets trace data for design-time tracing of rendering data, using the trace data key and the trace data value.

(继承自 Control)
SetTraceData(Object, Object, Object)

使用跟踪对象、跟踪数据键和跟踪数据值,为呈现数据的设计时追踪设置跟踪数据。Sets trace data for design-time tracing of rendering data, using the traced object, the trace data key, and the trace data value.

(继承自 Control)
ToString()

返回一个表示当前对象的 string。Returns a string that represents the current object.

(继承自 Object)
TrackViewState()

使控件跟踪其视图状态的更改,以便可以将这些更改存储在对象的 ViewState 属性中。Causes the control to track changes to its view state so they can be stored in the object's ViewState property.

(继承自 WebControl)
Validate()

对关联的输入控件执行验证并更新 IsValid 属性。Performs validation on the associated input control and updates the IsValid property.

(继承自 BaseValidator)

事件

DataBinding

当服务器控件绑定到数据源时发生。Occurs when the server control binds to a data source.

(继承自 Control)
Disposed

当从内存释放服务器控件时发生,这是请求 ASP.NET 页时服务器控件生存期的最后阶段。Occurs when a server control is released from memory, which is the last stage of the server control lifecycle when an ASP.NET page is requested.

(继承自 Control)
Init

当服务器控件初始化时发生;初始化是控件生存期的第一步。Occurs when the server control is initialized, which is the first step in its lifecycle.

(继承自 Control)
Load

当服务器控件加载到 Page 对象中时发生。Occurs when the server control is loaded into the Page object.

(继承自 Control)
PreRender

在加载 Control 对象之后、呈现之前发生。Occurs after the Control object is loaded but prior to rendering.

(继承自 Control)
ServerValidate

在服务器上执行验证时发生。Occurs when validation is performed on the server.

Unload

当服务器控件从内存中卸载时发生。Occurs when the server control is unloaded from memory.

(继承自 Control)

显式接口实现

IAttributeAccessor.GetAttribute(String)

获取具有指定名称的 Web 控件的特性。Gets an attribute of the Web control with the specified name.

(继承自 WebControl)
IAttributeAccessor.SetAttribute(String, String)

将 Web 控件的特性设置为指定的名称和值。Sets an attribute of the Web control to the specified name and value.

(继承自 WebControl)
IControlBuilderAccessor.ControlBuilder

有关此成员的说明,请参见 ControlBuilderFor a description of this member, see ControlBuilder.

(继承自 Control)
IControlDesignerAccessor.GetDesignModeState()

有关此成员的说明,请参见 GetDesignModeState()For a description of this member, see GetDesignModeState().

(继承自 Control)
IControlDesignerAccessor.SetDesignModeState(IDictionary)

有关此成员的说明,请参见 SetDesignModeState(IDictionary)For a description of this member, see SetDesignModeState(IDictionary).

(继承自 Control)
IControlDesignerAccessor.SetOwnerControl(Control)

有关此成员的说明,请参见 SetOwnerControl(Control)For a description of this member, see SetOwnerControl(Control).

(继承自 Control)
IControlDesignerAccessor.UserData

有关此成员的说明,请参见 UserDataFor a description of this member, see UserData.

(继承自 Control)
IDataBindingsAccessor.DataBindings

有关此成员的说明,请参见 DataBindingsFor a description of this member, see DataBindings.

(继承自 Control)
IDataBindingsAccessor.HasDataBindings

有关此成员的说明,请参见 HasDataBindingsFor a description of this member, see HasDataBindings.

(继承自 Control)
IExpressionsAccessor.Expressions

有关此成员的说明,请参见 ExpressionsFor a description of this member, see Expressions.

(继承自 Control)
IExpressionsAccessor.HasExpressions

有关此成员的说明,请参见 HasExpressionsFor a description of this member, see HasExpressions.

(继承自 Control)
IParserAccessor.AddParsedSubObject(Object)

有关此成员的说明,请参见 AddParsedSubObject(Object)For a description of this member, see AddParsedSubObject(Object).

(继承自 Control)

扩展方法

FindDataSourceControl(Control)

返回与指定控件的数据控件关联的数据源。Returns the data source that is associated with the data control for the specified control.

FindFieldTemplate(Control, String)

返回指定控件的命名容器中指定列的字段模板。Returns the field template for the specified column in the specified control's naming container.

FindMetaTable(Control)

返回包含数据控件的元表对象。Returns the metatable object for the containing data control.

适用于

另请参阅