关于IsCrossPagePostBack跨页回发，有一点想不通。
有两个页面Page1.aspx,Page2.aspxPage1.aspx的Button2指向Page2.aspx，在Page2.aspx中判断Page1.aspx的跨页回发是否指定了Page2.aspx，在Page2.aspx中指定了的IsCrossPagePostBack，直接访问Page2.aspx正常，能跳转到Page1.aspx，但是如果通过Page1.aspx的Button2跳转到Page2.aspx就出问题了，不能执行if (IsCrossPagePostBack){}里面的代码。
page1.aspx:
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
public TextBox pp_TextBox1
{
get
{
return TextBox1;
}
}
public Calendar pp_Calendar1
{
get
{
return Calendar1;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
this.Label1.Text = "Hello" + this.TextBox1.Text + "<br />" +
"选择日期：" + this.Calendar1.SelectedDate.ToShortDateString();
}
protected void Button2_Click(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
//Do Process
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="提交给自己" />
<asp:Button ID="Button2" runat="server" Text="提交给egPostBackUrl2.aspx" PostBackUrl="egPostBackUrl2.aspx" OnClick="Button2_Click" /><br />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Calendar ID="Calendar1" runat="server"></asp:Calendar>
<br />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label></div>
</form>
</body>
</html>
Page2.aspx:
<%@ Page Language="C#" %>
<%@ PreviousPageType VirtualPath="Page1.aspx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Page_Load(object sender, System.EventArgs e)
{
if (Page.IsCrossPagePostBack)
{
TextBox pp_Textbox1;
Calendar pp_Calendar1;
pp_Textbox1 = (TextBox)PreviousPage.FindControl("TextBox1");
pp_Calendar1 = (Calendar)PreviousPage.FindControl("Calendar1");
this.Label1.Text = "您好!" + pp_Textbox1.Text + "<br />" +
"日期选择：" + pp_Calendar1.SelectedDate.ToShortDateString();
this.Label2.Text = "您好!" + PreviousPage.pp_TextBox1.Text + "<br />" +
"日期选择：" + PreviousPage.pp_Calendar1.SelectedDate.ToShortDateString();
}
else
{
Response.Redirect("egPostBackUrl.aspx");
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label><br />
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label> </div>
</form>
</body>
</html> --------------------编程问答-------------------- 写错了几句
把page1中的PostBackUrl="egPostBackUrl2.aspx"改成PostBackUrl="Page2.aspx"
把page2中的Response.Redirect("egPostBackUrl.aspx");改成Response.Redirect("Page1.aspx"); --------------------编程问答-------------------- 我也有同样的问题，但是我的url都沒有写错：
default.aspx:
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="CrossPagePosting._Default" %>
<!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 runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" /><br />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label><br />
<br />
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="WebForm1.aspx">HyperLink</asp:HyperLink>
<asp:Button ID="Button2" runat="server" Text="Button" PostBackUrl="WebForm1.aspx" /></div>
</form>
</body>
</html>
default.aspx.vb
Partial Public Class _Default
Inherits System.Web.UI.Page
Public ReadOnly Property Info() As String
Get
Return Label1.Text
End Get
End Property
Protected Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Label1.Text = TextBox1.Text
End Sub
End Class
====
WebForm1.aspx:
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="WebForm1.aspx.vb" Inherits="CrossPagePosting.WebForm1" %>
<%@ PreviousPageType VirtualPath="Default.aspx" %>
<!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 runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label></div>
</form>
</body>
</html>
WebForm1.aspx.vb:
Public Partial Class WebForm1
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Me.IsCrossPagePostBack Then
Label1.Text = PreviousPage.Info
Else
Response.Redirect("default.aspx")
End If
End Sub
End Class --------------------编程问答-------------------- 不能执行if (IsCrossPagePostBack){}里面的代码 ?
那跳转了？ --------------------编程问答--------------------
--------------------编程问答-------------------- 好老的帖子啊
//if(Page.IsCrossPagePostBack)
if (PreviousPage.IsCrossPagePostBack == true)
--------------------编程问答-------------------- 嗯，5楼的
if (PreviousPage != null && PreviousPage.IsCrossPagePostBack == true)
补充：.NET技术 , ASP.NET
