TableCell.RenderContents(HtmlTextWriter) 方法
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
将 TableCell 内容呈现给指定的 HtmlTextWriter 对象。
protected:
override void RenderContents(System::Web::UI::HtmlTextWriter ^ writer);protected public:
override void RenderContents(System::Web::UI::HtmlTextWriter ^ writer);protected override void RenderContents (System.Web.UI.HtmlTextWriter writer);protected internal override void RenderContents (System.Web.UI.HtmlTextWriter writer);override this.RenderContents : System.Web.UI.HtmlTextWriter -> unitProtected Overrides Sub RenderContents (writer As HtmlTextWriter)Protected Friend Overrides Sub RenderContents (writer As HtmlTextWriter)参数
- writer
- HtmlTextWriter
在客户端上呈现 HTML 内容的输出流。
示例
下面的代码示例演示如何重写 RenderContents 自定义 TableCell 控件中的 方法，以便将其自定义文本插入到单元格的内容中。
<%@ Page Language="C#" %>
<%@ Register TagPrefix="aspSample"
Namespace="Samples.AspNet.CS.Controls"
Assembly="Samples.AspNet.CS" %>
<!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 id="Head2" runat="server">
<title>Custom TableCell - RenderContents - C# Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>Custom TableCell - RenderContents - C# Example</h3>
<asp:Table id="Table1" runat="server" CellPadding="3" CellSpacing="2">
<asp:TableRow>
<aspSample:CustomTableCellRenderContents Text="(0,0)" />
<aspSample:CustomTableCellRenderContents Text="(0,1)" />
<aspSample:CustomTableCellRenderContents Text="(0,2)" />
</asp:TableRow>
<asp:TableRow>
<aspSample:CustomTableCellRenderContents Text="(1,0)" />
<aspSample:CustomTableCellRenderContents Text="(1,1)" />
<aspSample:CustomTableCellRenderContents Text="(1,2)" />
</asp:TableRow>
</asp:Table>
</div>
</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 id="Head2" runat="server">
<title>Custom TableCell - RenderContents - VB.NET Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>Custom TableCell - RenderContents - VB.NET Example</h3>
<asp:Table id="Table1" runat="server" CellPadding="3" CellSpacing="2">
<asp:TableRow>
<aspSample:CustomTableCellRenderContents Text="(0,0)" />
<aspSample:CustomTableCellRenderContents Text="(0,1)" />
<aspSample:CustomTableCellRenderContents Text="(0,2)" />
</asp:TableRow>
<asp:TableRow>
<aspSample:CustomTableCellRenderContents Text="(1,0)" />
<aspSample:CustomTableCellRenderContents Text="(1,1)" />
<aspSample:CustomTableCellRenderContents Text="(1,2)" />
</asp:TableRow>
</asp:Table>
</div>
</form>
</body>
</html>
using System.Web;
using System.Security.Permissions;
namespace Samples.AspNet.CS.Controls
{
[AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
public sealed class CustomTableCellRenderContents : System.Web.UI.WebControls.TableCell
{
protected override void RenderContents(System.Web.UI.HtmlTextWriter writer)
{
// Insert text into each TableCell.
writer.Write("TableCell: ");
// Call the base RenderContents method.
base.RenderContents(writer);
}
}
}
Imports System.Web
Imports System.Security.Permissions
Namespace Samples.AspNet.VB.Controls
<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class CustomTableCellRenderContents
Inherits System.Web.UI.WebControls.TableCell
Protected Overrides Sub RenderContents(ByVal writer As System.Web.UI.HtmlTextWriter)
' Insert text into each TableCell.
writer.Write("TableCell: ")
' Call the base RenderContents method.
MyBase.RenderContents(writer)
End Sub
End Class
End Namespace
注解
TableCell如果控件具有子控件或在派生类中被重写，则调用基类的 RenderContents 方法;否则，将Text属性的值写入HtmlTextWriter对象。
方法 RenderContents 主要由扩展控件功能的 TableCell 控件开发人员使用。
