TextBox.AddAttributesToRender(HtmlTextWriter) TextBox.AddAttributesToRender(HtmlTextWriter) TextBox.AddAttributesToRender(HtmlTextWriter) TextBox.AddAttributesToRender(HtmlTextWriter) Method

定義

將需要呈現的 HTML 屬性 (Attribute) 和樣式加入至指定的 HtmlTextWriter 執行個體。Adds HTML attributes and styles that need to be rendered to the specified HtmlTextWriter instance.

protected:
 override void AddAttributesToRender(System::Web::UI::HtmlTextWriter ^ writer);
protected override void AddAttributesToRender (System.Web.UI.HtmlTextWriter writer);
override this.AddAttributesToRender : System.Web.UI.HtmlTextWriter -> unit
Protected Overrides Sub AddAttributesToRender (writer As HtmlTextWriter)

參數

writer
HtmlTextWriter HtmlTextWriter HtmlTextWriter HtmlTextWriter

HtmlTextWriter,代表要在用戶端呈現 HTML 內容的輸出資料流。An HtmlTextWriter that represents the output stream to render HTML content on the client.

範例

下列程式碼範例示範如何覆寫自AddAttributesToRender定義伺服器控制項中的方法,讓TextBox控制項文字一律以粗體顯示。The following code example demonstrates how to override the AddAttributesToRender method in a custom server control, so that the TextBox control text always appears bold.

重要

這個範例有一個可接受使用者輸入的文字方塊,這可能會造成安全性威脅。This example has a text box that accepts user input, which is a potential security threat. 根據預設,ASP.NET Web 網頁會驗證使用者輸入未包含指令碼或 HTML 項目。By default, ASP.NET Web pages validate that user input does not include script or HTML elements. 如需詳細資訊,請參閱 Script Exploits Overview (指令碼攻擊概觀)。For more information, see Script Exploits Overview.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ 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>Custom TextBox - AddAttributesToRender - C# Example</title>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom TextBox - AddAttributesToRender - C# Example</h3>
            
            <aspSample:CustomTextBoxAddAttributesToRender 
              id="TextBox1" 
              runat="server">Hello World!
            </aspSample:CustomTextBoxAddAttributesToRender>
            
        </form>
    </body>
</html>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ 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>Custom TextBox - AddAttributesToRender - VB.NET Example</title>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom TextBox - AddAttributesToRender - VB.NET Example</h3>
            
            <aspSample:CustomTextBoxAddAttributesToRender id="TextBox1" 
             runat="server">Hello World!</aspSample:CustomTextBoxAddAttributesToRender>
        </form>
    </body>
</html>
using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomTextBoxAddAttributesToRender : System.Web.UI.WebControls.TextBox
  {
    protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer)
    {
      // Show the TextBox text as Bold.
      writer.AddStyleAttribute(System.Web.UI.HtmlTextWriterStyle.FontWeight, "bold");

      // Call the base AddAttributesToRender method.
      base.AddAttributesToRender(writer);
    }
  }
}
Imports System.Web
Imports System.Security.Permissions

Namespace Samples.AspNet.VB.Controls
    <AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
    Public NotInheritable Class CustomTextBoxAddAttributesToRender
        Inherits System.Web.UI.WebControls.TextBox

        Protected Overrides Sub AddAttributesToRender(ByVal writer As System.Web.UI.HtmlTextWriter)

            ' Show the TextBox text as Bold.
            writer.AddStyleAttribute(System.Web.UI.HtmlTextWriterStyle.FontWeight, "bold")

            ' Call the base AddAttributesToRender method.
            MyBase.AddAttributesToRender(writer)
        End Sub
    End Class
End Namespace

備註

這個方法主要是由控制項開發人員用來將其他屬性和樣式插入HtmlTextWriter TextBox控制項的輸出資料流程中。This method is used primarily by control developers to insert the additional attributes and styles to the HtmlTextWriter output stream for a TextBox control. 這個方法覆寫 WebControl.AddAttributesToRenderThis method overrides WebControl.AddAttributesToRender.

適用於