TextBox.Text 属性

定义

获取或设置 TextBox 控件的文本内容。

public:
 virtual property System::String ^ Text { System::String ^ get(); void set(System::String ^ value); };
[System.ComponentModel.Bindable(true)]
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.EncodedInnerDefaultProperty)]
public virtual string Text { get; set; }
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.EncodedInnerDefaultProperty)]
[System.ComponentModel.Bindable(true, System.ComponentModel.BindingDirection.TwoWay)]
public virtual string Text { get; set; }
[<System.ComponentModel.Bindable(true)>]
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.EncodedInnerDefaultProperty)>]
member this.Text : string with get, set
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.EncodedInnerDefaultProperty)>]
[<System.ComponentModel.Bindable(true, System.ComponentModel.BindingDirection.TwoWay)>]
member this.Text : string with get, set
Public Overridable Property Text As String

属性值

String

TextBox 控件中显示的文本。 默认值为空字符串("")。

实现

属性

示例

下面的代码示例演示如何使用 TextBox 控件获取用户输入。 当用户单击“ 添加 ”按钮时,将显示文本框中输入的值的总和。

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。 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。 有关详细信息,请参阅脚本侵入概述

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

<!DOCTYPE html>
<html>

<head>
    <title>TextBox Example</title>
    <script runat="server">
      protected void AddButton_Click(Object sender, EventArgs e)
      {
         int Answer;
         Answer = Convert.ToInt32(Value1.Text) + Convert.ToInt32(Value2.Text);
         AnswerMessage.Text = Answer.ToString();
      }
    </script>
</head>
<body>
  <form id="form1" runat="server">
    <h3> TextBox Example </h3>
    <p>
        <asp:TextBox ID="Value1" Columns="2" MaxLength="3" Text="1" runat="server"/>
        +
        <asp:TextBox ID="Value2" Columns="2" MaxLength="3" Text="1" runat="server"/>
        =
        <asp:Label ID="AnswerMessage" runat="server"/>
    </p>
    <p>
        <asp:Button ID="AddButton" Text="Add" OnClick="AddButton_Click" runat="server"/>
    </p>
    <p>
        <asp:RequiredFieldValidator ID="Value1RequiredValidator" ControlToValidate="Value1"
             ErrorMessage="Please enter a value.<br />" Display="Dynamic"
             runat="server"/>
        <asp:RequiredFieldValidator ID="Value2RequiredValidator" ControlToValidate="Value2"
             ErrorMessage="Please enter a value.<br />" Display="Dynamic"
             runat="server"/>
        <asp:RangeValidator ID="Value1RangeValidator" ControlToValidate="Value1"
             Type="Integer" MinimumValue="1" MaximumValue="100" Display="Dynamic"
             ErrorMessage="Please enter an integer <br /> between than 1 and 100.<br />"
             runat="server"/>
        <asp:RangeValidator ID="Value2RangeValidator" ControlToValidate="Value2"
             Type="Integer" MinimumValue="1" MaximumValue="100" Display="Dynamic"
             ErrorMessage="Please enter an integer <br /> between than 1 and 100.<br />"
             runat="server"/>
    </p>
  </form>
</body>
</html>
<%@ Page Language="vb" AutoEventWireup="false" %>

<!DOCTYPE html>
<html>

<head>
    <title>TextBox Example</title>
    <script runat="server">
        Protected Sub AddButton_Click(sender As Object, e As EventArgs)
            Dim Answer As Integer
            Answer = Convert.ToInt32(Value1.Text) + Convert.ToInt32(Value2.Text)
            AnswerMessage.Text = Answer.ToString()
        End Sub
    </script>
</head>
<body>
  <form id="form1" runat="server">
    <h3> TextBox Example </h3>
    <p>
        <asp:TextBox ID="Value1" Columns="2" MaxLength="3" Text="1" runat="server"/>
        +
        <asp:TextBox ID="Value2" Columns="2" MaxLength="3" Text="1" runat="server"/>
        =
        <asp:Label ID="AnswerMessage" runat="server"/>
    </p>
    <p>
        <asp:Button ID="AddButton" Text="Add" OnClick="AddButton_Click" runat="server"/>
    </p>
    <p>
        <asp:RequiredFieldValidator ID="Value1RequiredValidator" ControlToValidate="Value1"
             ErrorMessage="Please enter a value.<br />" Display="Dynamic"
             runat="server"/>
        <asp:RequiredFieldValidator ID="Value2RequiredValidator" ControlToValidate="Value2"
             ErrorMessage="Please enter a value.<br />" Display="Dynamic"
             runat="server"/>
        <asp:RangeValidator ID="Value1RangeValidator" ControlToValidate="Value1"
             Type="Integer" MinimumValue="1" MaximumValue="100" Display="Dynamic"
             ErrorMessage="Please enter an integer <br /> between than 1 and 100.<br />"
             runat="server"/>
        <asp:RangeValidator ID="Value2RangeValidator" ControlToValidate="Value2"
             Type="Integer" MinimumValue="1" MaximumValue="100" Display="Dynamic"
             ErrorMessage="Please enter an integer <br /> between than 1 and 100.<br />"
             runat="server"/>
    </p>
  </form>
</body>
</html>

注解

使用 Text 属性指定或确定控件中显示的 TextBox 文本。 若要限制控件接受的字符数,请设置 MaxLength 属性。 如果要阻止修改文本,请设置该 ReadOnly 属性。

设置时,此属性的值可以使用设计器工具自动保存到资源文件中。 有关详细信息,请参阅 LocalizableAttribute ASP.NET 全球化和本地化

呈现文本框后,此属性的内容将进行 HTML 编码。 例如,如果将此属性设置为“<b>Test</b>”,浏览器将显示“Test</b>”<b>,而不是粗体显示“Test”。

适用于

另请参阅