CheckBox.Render(HtmlTextWriter) 方法
定义
重要
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在客户端上显示 CheckBox。
protected:
override void Render(System::Web::UI::HtmlTextWriter ^ writer);protected public:
override void Render(System::Web::UI::HtmlTextWriter ^ writer);protected override void Render (System.Web.UI.HtmlTextWriter writer);protected internal override void Render (System.Web.UI.HtmlTextWriter writer);override this.Render : System.Web.UI.HtmlTextWriter -> unitProtected Overrides Sub Render (writer As HtmlTextWriter)Protected Friend Overrides Sub Render (writer As HtmlTextWriter)参数
- writer
- HtmlTextWriter
一个 HtmlTextWriter，包含要在客户端上呈现的输出流。
示例
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page language="c#" %>
<!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 CheckBox - Render - C# Example</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom CheckBox - Render - C# Example</h3>
<aspSample:CustomCheckBoxRender
id="CheckBox1"
runat="server"
text="CheckBox1" />
</form>
</body>
</html>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ Page language="VB" %>
<!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 CheckBox - Render - VB.NET Example</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom CheckBox - Render - VB.NET Example</h3>
<aspSample:CustomCheckBoxRender id="CheckBox1" runat="server" text="CheckBox1" />
</form>
</body>
</html>
using System.Web;
using System.Security.Permissions;
namespace Samples.AspNet.CS.Controls
{
[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class CustomCheckBoxRender : System.Web.UI.WebControls.CheckBox
{
protected override void Render(System.Web.UI.HtmlTextWriter writer)
{
// Call the base class's Render method.
base.Render(writer);
// Render a BR HTML tag
writer.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Br);
// Create and render a new Image Web control.
System.Web.UI.WebControls.Image image = new System.Web.UI.WebControls.Image();
image.ID = "Image1";
image.ImageUrl = "image.jpg";
image.AlternateText = "Image for CheckBox1.";
image.RenderControl(writer);
}
}
}
Imports System.Web
Imports System.Security.Permissions
Namespace Samples.AspNet.VB.Controls
<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class CustomCheckBoxRender
Inherits System.Web.UI.WebControls.CheckBox
Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)
' Call the base class's Render method.
MyBase.Render(writer)
' Render a BR HTML tag
writer.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Br)
' Create and render a new Image Web control.
Dim image As New System.Web.UI.WebControls.Image
image.ID = "Image1"
image.ImageUrl = "image.jpg"
image.AlternateText = "Image for CheckBox1."
image.RenderControl(writer)
End Sub
End Class
End Namespace