How to: Post ASP.NET Web Pages to a Different Page

How to: Post ASP.NET Web Pages to a...

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Microsoft Visual Studio 2008/.NET Framework 3.5

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ASP.NET

How to: Post ASP.NET Web Pages to a Different Page

By default, controls on ASP.NET Web pages that cause a postback, such as the Button control, post back to the page for processing. However, you can configure controls to post to a different page. For example, you might be creating a multi-page form that collects different information on each page.

On the target page, you can read the values of controls or public properties from the source page. For more information, see Cross-Page Posting in ASP.NET Web Pages.

To post an ASP.NET Web page to another page

Add a button control to your Web page, such as a Button, LinkButton, or ImageButton control.
Set the PostBackUrl property for the control to the URL of the page to which you want to post the ASP.NET Web page.
The following code example illustrates a Button control that is configured to post to a page named TargetPage in the root of the Web site.
```
<asp:Button 
  ID="Button1" 
  PostBackUrl="~/TargetPage.aspx"
  runat="server"
  Text="Submit" />
```
For more information, see How to: Pass Values Between ASP.NET Web Pages.

Tasks

How to: Pass Values Between ASP.NET Web Pages

How to: Determine How ASP.NET Web Pages Were Invoked

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Cross-Page Posting in ASP.NET Web Pages

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Determining the names of the items in the forms collection

Orpheus ... Thomas Lee | Edit | Show History

If you are using a master page, determining the names of the items in the forms collection can be difficult. You can use the code below to create an Excel spreadsheet of the form item names and values.

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Response.Clear()
        Response.Buffer = True
        Response.ContentType = "application/vnd.ms-excel"
        Response.Charset = ""
        Response.AddHeader("Content-Disposition", "attachment; filename=Form Collection.xls")
        Page.EnableViewState = False

        sbHTML.Append("<table border=""0"" cellpadding=""3"" style=""border-collapse: collapse"" width=""100%"" bordercolor=""#000000"" id=""table1"">" & Environment.NewLine)
        sbHTML.Append("<tr>" & Environment.NewLine)
        sbHTML.Append("<td bgcolor=""black"" colspan=""2""><b><font face=""Arial"" color=""white"" size=""4"">Form Collection</font></b></td>" & Environment.NewLine)
        sbHTML.Append("</tr>" & Environment.NewLine)
        sbHTML.Append("<tr>" & Environment.NewLine)
        sbHTML.Append("<th>Name</th>" & Environment.NewLine)
        sbHTML.Append("<th>Value</th>" & Environment.NewLine)
        sbHTML.Append("</tr>" & Environment.NewLine)

        Dim i As Integer
        For i = 0 To Request.Form.Count - 1
            sbHTML.Append("<tr>" & Environment.NewLine)
            sbHTML.Append("<td height=19>" & Request.Form.AllKeys(i) & "</td>" & Environment.NewLine)
            sbHTML.Append("<td height=19>" & Request.Form(i) & "</td>" & Environment.NewLine)
            sbHTML.Append("</tr>" & Environment.NewLine)
        Next

        sbHTML.Append("</table>" & Environment.NewLine)
        'Debug.WriteLine(sbHTML.ToString())
        Response.Write(sbHTML.ToString())
        Response.End()
    End Sub