PRB: Loss of Query Sting Values When You Use J-PHONE (312099)


The information in this article applies to:

  • Microsoft Mobile Internet Toolkit (MMIT)
This article was previously published under Q312099

SYMPTOMS

When you use the J-PHONE and the J-PHONE emulator, if you append query string values to the Action attribute of a <form> tag and use the HttpRequest.QueryString collection to retrieve the values, no query string values are retrieved.

CAUSE

This problem occurs because of a J-PHONE limitation wherein you cannot append a query string to the URL in the Action attribute of a <form> tag.

RESOLUTION

When you use the J-PHONE and the J-PHONE emulator, use the HttpRequest collection instead of HttpRequest.QueryString to retrieve query string values from the Action attribute of a <form> tag.

MORE INFORMATION

Steps to Reproduce the Behavior

  1. Create a new .aspx page named Page1.aspx, and then add the following code: 
    <%@ Page Inherits="System.Web.UI.MobileControls.MobilePage" AutoEventWireup="true" %>
<%@ Register TagPrefix="mobile" Namespace="System.Web.UI.MobileControls" Assembly="System.Web.Mobile" %>

<body Xmlns:mobile="http://schemas.microsoft.com/Mobile/WebForm">
    <mobile:Form id=Form1 runat="server" Action="QueryString2.aspx?name=value">
		<mobile:Command ID="command1" Runat=server Text="Submit" />
    </mobile:Form>
</body>
    Notice the Action attribute contains the code Action="QueryString2.aspx?name=value">.
  2. Create a second .aspx page named Page2.aspx, and then add the following code: 
    <%@ Page language="c#" Inherits="System.Web.UI.MobileControls.MobilePage" AutoEventWireup="true" %>
<%@ Register TagPrefix="mobile" Namespace="System.Web.UI.MobileControls" Assembly="System.Web.Mobile" %>

<body Xmlns:mobile="http://schemas.microsoft.com/Mobile/WebForm">
    <mobile:Form id=Form1 runat="server">
		<mobile:Label ID="label1" Runat=server />
    </mobile:Form>
</body>
<script runat=server>
void Page_Load(Object sender, EventArgs e)
{
	label1.Text = Request.QueryString["name"].ToString();
}
</script>
    Notice that this code uses Request["name"].ToString() to retrieve the query string value.
  3. Use the code with the J-PHONE and the J-PHONE emulator. Notice that Page2.aspx cannot retrieve the values that are passed from Page1.aspx. Request.QueryString["name"].ToString() does not return any values.

    Resolution

  4. Replace the code in Page2.aspx with the following code: 
    <%@ Page language="c#" Inherits="System.Web.UI.MobileControls.MobilePage" AutoEventWireup="true" %>
<%@ Register TagPrefix="mobile" Namespace="System.Web.UI.MobileControls" Assembly="System.Web.Mobile" %>

<body Xmlns:mobile="http://schemas.microsoft.com/Mobile/WebForm">
    <mobile:Form id=Form1 runat="server">
		<mobile:Label ID="label1" Runat=server />
    </mobile:Form>
</body>
<script runat=server>
void Page_Load(Object sender, EventArgs e)
{
	label1.Text = Request["name"].ToString();
}
</script>
    This code uses the HttpRequest collection instead of the HttpRequest.QueryString collection.
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Modification Type:MajorLast Reviewed:6/14/2002
Keywords:kbEmulation kbprb kbWMLDevice KB312099 kbAudDeveloper
©2002 Microsoft Corporation. All rights reserved.