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ASP. Net cross page submission (button control page redirection)

2022-06-29 21:50:00 【Eighty eight old】

newly build web forms
Cross1.aspx
Cross2.aspx

1、 Set source page Button The control of PostBackUrl attribute Set as target page path 

PostBackUrl="~/Chap2/Cross2.aspx"

2、 Add... In the header of the target page **@PreviousPageType Instructions **, Set properties VirtualPath Is the source page path 

<%@ PreviousPageTypeVirtualPath=="~/Chap2/Cross1.aspx"%>

Cross1.aspx Complete code 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Cross1.aspx.cs" Inherits="Chap2_Cross1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>

             user name ：<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
            <br />
             password ：<asp:TextBox ID="txtPassword" runat="server"></asp:TextBox>
            <br />
            <asp:Button ID="btnSubmit" runat="server" Text=" confirm " PostBackUrl="~/Chap2/Cross2.aspx" />

        </div>
    </form>
</body>
</html>

3、 There are two ways to access source page data on the target page
Use public attributes to get values
Get values using control properties
Key code 

 public string Name  
    {
    
        get {
     return txtName.Text; }
    }

// Use public attributes to get values 
            lblMsg.Text = " user name ：" + PreviousPage.Name + "<br/>";

            // Get values using control properties 
            TextBox txtPassword = (TextBox)PreviousPage.FindControl("txtPassword");
            lblMsg.Text += " password ：" + txtPassword.Text;

Cross1.aspx.cs Complete code 

public partial class Chap2_Cross1 : System.Web.UI.Page
{
    
    public string Name  
    {
    
        get {
     return txtName.Text; }
    }
}

Cross2.aspx Complete code 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Cross2.aspx.cs" Inherits="Chap2_Cross2" %>
<%@ PreviousPageType VirtualPath="~/Chap2/Cross1.aspx" %>
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:Label ID="lblMsg" runat="server" ></asp:Label>
        </div>
    </form>
</body>
</html>

Cross2.aspx.cs Complete code 

using System;
using System.Web.UI.WebControls;

public partial class Chap2_Cross2 : System.Web.UI.Page
{
    
    protected void Page_Load(object sender, EventArgs e)
    {
    
        if(PreviousPage.IsCrossPagePostBack)// Determine whether it is cross page submission 
        {
    
            // Use public attributes to get values 
            lblMsg.Text = " user name ：" + PreviousPage.Name + "<br/>";

            // Get values using control properties 
            TextBox txtPassword = (TextBox)PreviousPage.FindControl("txtPassword");
            lblMsg.Text += " password ：" + txtPassword.Text;
        }

    }
}

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