ASP.Net/Page/Between Pages

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Deal with previous page in VB.net

<%@ Page Language="VB" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Button Search</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <asp:Label
        id="lblSearch"
        Text="Search:"
        Runat="server" />
    <asp:TextBox
        id="txtSearch"
        Runat="server" />
    <asp:Button
        id="btnSearch"
        Text="Go!"
        PostBackUrl="ButtonSearchResultsVB.aspx"
        Runat="server" />
    </div>
    </form>
</body>
</html>

<%--
<%@ Page Language="VB" %>
<script runat="server">
    Sub Page_Load()
        If Not IsNothing(PreviousPage) Then
            Dim txtSearch As TextBox = CType(PreviousPage.FindControl("txtSearch"), TextBox)
            lblSearch.Text = String.Format("Search For: {0}", txtSearch.Text)
        End If
    End Sub
    
</script>
<html>
<head id="Head1" runat="server">
    <title>Button Search Results</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <asp:Label
        id="lblSearch"
        Runat="server" />
    
    </div>
    </form>
</body>
</html>

--%>



Get control from Previous page (C#)

<%@ Page Language="C#" %>
<html>
<head id="Head1" runat="server">
    <title>Button Search</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <asp:Label
        id="lblSearch"
        Text="Search:"
        Runat="server" />
    <asp:TextBox
        id="txtSearch"
        Runat="server" />
    <asp:Button
        id="btnSearch"
        Text="Go!"
        PostBackUrl="ButtonSearchResults.aspx"
        Runat="server" />
    </div>
    </form>
</body>
</html>

<%--
<%@ Page Language="C#" %>
<script runat="server">
    void Page_Load()
    {
        if (PreviousPage != null)
        {
            TextBox txtSearch = (TextBox)PreviousPage.FindControl("txtSearch");
            lblSearch.Text = String.Format("Search For: {0}", txtSearch.Text);
        }
    }
    
</script>
<html>
<head>
    <title>Button Search Results</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <asp:Label
        id="lblSearch"
        Runat="server" />
    
    </div>
    </form>
</body>
</html>
--%>



Pass session variable between pages (C#)

<%@ Page language="c#" src="Cookieless1.aspx.cs" AutoEventWireup="false" Inherits="Cookieless1" %>
<HTML>
  <body>
    <form id="Form1" method="post" runat="server">
      <asp:HyperLink id="lnkRedirect" style="Z-INDEX: 100; LEFT: 31px; POSITION: absolute; TOP: 32px" runat="server" Width="296px" Height="32px" NavigateUrl="Cookieless2.aspx">Go to Cookieless2 using a HyperLink control</asp:HyperLink>
      <asp:Button id="cmdLinkAbsolute" style="Z-INDEX: 104; LEFT: 32px; POSITION: absolute; TOP: 180px" runat="server" Width="264px" Text="Go to Cookieless2 using an absolute path"></asp:Button>
      <asp:Button id="cmdLink" style="Z-INDEX: 102; LEFT: 32px; POSITION: absolute; TOP: 104px" runat="server" Width="264px" Text="Go to Cookieless2 using a relative path"></asp:Button>
      <asp:Label id="lblInfo" style="Z-INDEX: 103; LEFT: 348px; POSITION: absolute; TOP: 32px" runat="server" Width="292px" Height="188px" Font-Names="Verdana" Font-Size="X-Small">Hyperlink.NavigateUrl is set to <b>
          "Cookieless1.aspx"</b> in code.<br><br><br>The relative path uses<br><b>Response.Redirect("Cookieless1.aspx")</b><br><br><br>The absoulte path uses <b>
          Response.Redirect(MapPath("Cookieless2.aspx"))</b></asp:Label>
    </form>
  </body>
</HTML>

<%-- Cookieless1.aspx.cs
using System;
using System.Collections;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

  public class Cookieless1 : System.Web.UI.Page
  {
    protected System.Web.UI.WebControls.HyperLink lnkRedirect;
    protected System.Web.UI.WebControls.Button cmdLinkAbsolute;
    protected System.Web.UI.WebControls.Button cmdLink;
    protected System.Web.UI.WebControls.Label lblInfo;
  
    private void Page_Load(object sender, System.EventArgs e)
    {
      Session["test"] = "Test String";
    }
    #region Web Form Designer generated code
    override protected void OnInit(EventArgs e)
    {
      //
      // CODEGEN: This call is required by the ASP.NET Web Form Designer.
      //
      InitializeComponent();
      base.OnInit(e);
    }
    
    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {    
      this.cmdLinkAbsolute.Click += new System.EventHandler(this.cmdLinkAbsolute_Click);
      this.cmdLink.Click += new System.EventHandler(this.cmdLink_Click);
      this.Load += new System.EventHandler(this.Page_Load);
    }
    #endregion
    private void cmdLink_Click(object sender, System.EventArgs e)
    {
          Response.Redirect("Cookieless2.aspx");
    }
    private void cmdLinkAbsolute_Click(object sender, System.EventArgs e)
    {
      string url;
      url = "http://www.nfex.ru/Cookieless2.aspx";
      Response.Redirect(url);
    }
  }

--%>
<%-- Cookieless2.aspx
<%@ Page language="c#" src="Cookieless2.aspx.cs" AutoEventWireup="false" Inherits="Cookieless2" %>
<HTML>
  <body MS_POSITIONING="GridLayout">
    <form id="Form1" method="post" runat="server">
      <asp:Label id="lblInfo" style="Z-INDEX: 101; LEFT: 30px; POSITION: absolute; TOP: 27px" runat="server" Width="576px" Height="160px" Font-Bold="True" Font-Names="Verdana" Font-Size="Large"></asp:Label>
    </form>
  </body>
</HTML>
--%>
<%--
using System;
using System.Collections;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
  public class Cookieless2 : System.Web.UI.Page
  {
    protected System.Web.UI.WebControls.Label lblInfo;
  
    private void Page_Load(object sender, System.EventArgs e)
    {
      if (Session["test"] != null)
      {
        lblInfo.Text = "Successfully retrieved " + (string)Session["test"];
      }
      else
      {
        lblInfo.Text = "Session information not found.";
      }
    }
    #region Web Form Designer generated code
    override protected void OnInit(EventArgs e)
    {
      //
      // CODEGEN: This call is required by the ASP.NET Web Form Designer.
      //
      InitializeComponent();
      base.OnInit(e);
    }
    
    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {    
      this.Load += new System.EventHandler(this.Page_Load);
    }
    #endregion
  }

--%>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Page/Between_Pages&oldid=2268»