指定したライタに属性を表示してから、RenderAttributes メソッドを呼び出します。
名前空間: System.Web.UI.HtmlControls
アセンブリ: System.Web (system.web.dll 内)
構文
'宣言
Protected Overrides Sub RenderAttributes ( _
writer As HtmlTextWriter _
)
'使用
Dim writer As HtmlTextWriter
Me.RenderAttributes(writer)
protected override void RenderAttributes (
HtmlTextWriter writer
)
protected:
virtual void RenderAttributes (
HtmlTextWriter^ writer
) override
protected void RenderAttributes (
HtmlTextWriter writer
)
protected override function RenderAttributes (
writer : HtmlTextWriter
)
適用できません。
パラメータ
- writer
表示される内容を受け取る HtmlTextWriter。
解説
RenderAttributes メソッドは HtmlControl.RenderAttributes 基本メソッドをオーバーライドします。RenderAttributes は、主に、コントロール開発者が使用します。
使用例
カスタム サーバー コントロールの OnPreRender メソッドをオーバーライドして、ツールヒントとしてアクセスできる特定のタイトル テキストが HtmlInputButton に常に表示されるようにする方法を次のコード例に示します。
<%@ 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 HtmlInputButton - RenderAttributes - Visual Basic Example</title>
<script runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
HtmlInputButton1.Attributes.Add("onclick", "alert('Hello client-side world.');")
End Sub
Sub HtmlInputButton1_ServerClick(sender As Object, e As EventArgs)
Div1.InnerHtml = "Hello server-side world."
End Sub
</script>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom HtmlInputButton - RenderAttributes - Visual Basic Example</h3>
<aspSample:CustomHtmlInputButtonRenderAttributes
id="HtmlInputButton1"
runat="server"
type="button"
onserverclick="HtmlInputButton1_ServerClick"
value="Html Input Button"
name="HtmlInputButton1">
<div id="Div1" runat="server"
style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px" />
</form>
</body>
</html>
<%@ 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 HtmlInputButton - RenderAttributes - C# Example</title>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
HtmlInputButton1.Attributes.Add("onclick","alert('Hello client-side world.');");
}
void HtmlInputButton1_ServerClick(Object sender, EventArgs e)
{
Div1.InnerHtml = "Hello server-side world.";
}
</script>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom HtmlInputButton - RenderAttributes - C# Example</h3>
<aspSample:CustomHtmlInputButtonRenderAttributes
id="HtmlInputButton1"
runat="server"
type="button"
onserverclick="HtmlInputButton1_ServerClick"
value="Html Input Button"
name="HtmlInputButton1">
<div id="Div1" runat="server"
style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px" />
</form>
</body>
</html>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSl" %>
<%@ Page Language="VJ#" 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 HtmlInputButton - RenderAttributes - VJ# Example</title>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
HtmlInputButton1.get_Attributes().Add("onclick",
"alert('Hello client-side world.');");
} //Page_Load
void HtmlInputButton1_ServerClick(Object sender, EventArgs e)
{
Div1.set_InnerHtml("Hello server-side world.");
} //HtmlInputButton1_ServerClick
</script>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom HtmlInputButton - RenderAttributes - VJ# Example</h3>
<aspSample:CustomHtmlInputButtonRenderAttributes
id="HtmlInputButton1"
runat="server"
type="button"
onserverclick="HtmlInputButton1_ServerClick"
value="Html Input Button"
name="HtmlInputButton1">
<div id="Div1" runat="server"
style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px" />
</form>
</body>
</html>
Imports System.Web
Imports System.Security.Permissions
Namespace Samples.AspNet.VB.Controls
<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class CustomHtmlInputButtonRenderAttributes
Inherits System.Web.UI.HtmlControls.HtmlInputButton
Protected Overrides Sub RenderAttributes(ByVal writer As System.Web.UI.HtmlTextWriter)
' Call the base class's RenderAttributes method.
MyBase.RenderAttributes(writer)
' Write out the HtmlInputButton control's Title tag.
writer.Write(" Title=""Text from RenderAttributes.""")
End Sub
End Class
End Namespace
using System.Web;
using System.Security.Permissions;
namespace Samples.AspNet.CS.Controls
{
[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class CustomHtmlInputButtonRenderAttributes : System.Web.UI.HtmlControls.HtmlInputButton
{
protected override void RenderAttributes(System.Web.UI.HtmlTextWriter writer)
{
// Call the base class's RenderAttributes method.
base.RenderAttributes(writer);
// Write out the HtmlInputButton control's Title tag.
writer.Write(" Title=\"Text from RenderAttributes.\"");
}
}
}
package Samples.AspNet.JSL.Controls;
public class CustomHtmlInputButtonRenderAttributes
extends System.Web.UI.HtmlControls.HtmlInputButton
{
protected void RenderAttributes(System.Web.UI.HtmlTextWriter writer)
{
// Write out Title tag
writer.Write(" Title=\"Text from RenderAttributes.\"");
// Call the base's RenderAttributes method.
super.RenderAttributes(writer);
} //RenderAttributes
} //CustomHtmlInputButtonRenderAttributes
プラットフォーム
Windows 98,Windows Server 2000 SP4,Windows CE,Windows Millennium Edition,Windows Mobile for Pocket PC,Windows Mobile for Smartphone,Windows Server 2003,Windows XP Media Center Edition,Windows XP Professional x64 Edition,Windows XP SP2,Windows XP Starter Edition
Microsoft .NET Framework 3.0 は Windows Vista,Microsoft Windows XP SP2,および Windows Server 2003 SP1 でサポートされています。
バージョン情報
.NET Framework
サポート対象 : 3.0,2.0,1.1,1.0
参照
関連項目
HtmlInputButton クラス
HtmlInputButton メンバ
System.Web.UI.HtmlControls 名前空間