2-PostBackUrl执行跨页面发送

来源：互联网发布：家用网络摄像头好不好编辑：程序博客网时间：2024/05/21 21:44

作为使用FindControl()方法从前面页面中获取某个控件的替代方法，可以通过页面属性来暴露控件。代码A.aspx.cs中通过SearchString 属性暴露了txtSearch.这个页面将表单数据发送到B.aspx中

一：A.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="A.aspx.cs" Inherits="A" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>

<body>

<asp:Label ID="lbsearch" runat="server" Text="Search:"></asp:Label>

<asp:TextBox ID="txtSearch" runat="server"></asp:TextBox> <asp:Button ID="btnSearch"

runat="server" PostBackUrl="B.aspx" Text="Go!" />

</form>

</body>

</html>

二：A.aspx.cs

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class A: System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{ }

public string SearchString

{

get { return txtSearch.Text; }

}

三：B.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="B.aspx.cs" Inherits="B" %>

<%@PreviousPageType VirtualPath="~/Default.aspx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>

<body>

<div>

<asp:Label ID="lblSearch" runat="server"></asp:Label></div>

</form>

</body>

</html>

四：B.aspx.cs

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class ButtonSearchResults : System.Web.UI.Page

{

protected void Page_Load()

{

if (PreviousPage!=null)

{

lblSearch.Text = String.Format("SearchFor:{0}",PreviousPage.SearchString);

}

在B.aspx中包含一个<%@PreviousPageType%>, 这个指令把PreviousPage 属性返回的值转换成ButtonSearchType类的实例。如果没有这个指令，PreviousPage 属性会把前页面作为通用的Page类的实例返回。