Hi All,
I have a GridView inside the EditItemTemplat e of a FormView. Both FormView
and GridView are data bound using an ObjectDataSourc e. When the FormView's
ObjectDataSourc e object has a SelectParameter s with a SessionParamete r in
the parameters collection and the object stored in the Session is a
reference type,
the DataGrid fails to enter Line Editing mode.
Is this a bug? Is there a workaround for this problem?
I have created a minimal sample that demonstrates this problem.
I have 4 files in my sample.
1. Global.asax - initializes a Session state variable.
2. Default.aspx - holds the FormView and the GridView in it.
3. MyDataSource.cs - implements the data source object.
4. MyState.cs - a class to be saved in Session and passed in to the Select
statement using a SessionParamete r.
Here is the code:
Global.asax:
-----
<%@ Application Language="C#" %>
<script runat="server">
void Session_Start(o bject sender, EventArgs e)
{
Session["MySessionV ar"] = new MyState("MyValu e");
}
</script>
----
End Global.asax
Default.aspx:
----
<%@ Page Language="C#" AutoEventWireup ="true" CodeFile="Defau lt.aspx.cs"
Inherits="_Defa ult" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt d">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitl ed Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FormView ID="FormView1" runat="server" DataSourceID="F ormViewODS"
DefaultMode="Ed it">
<EditItemTempla te>
<asp:GridView ID="GridView1" runat="server" DataSourceID="G ridViewODS"
AutoGenerateEdi tButton="true">
</asp:GridView>
<asp:ObjectData Source ID="GridViewODS " runat="server"
TypeName="MyDat aSource" SelectMethod="G ridViewSelect"
UpdateMethod="G ridRowUpdate">
</asp:ObjectDataS ource>
</EditItemTemplat e>
</asp:FormView>
<asp:ObjectData Source ID="FormViewODS " runat="server"
TypeName="MyDat aSource" SelectMethod="F ormViewSelectWi thSession"
EnableViewState ="false">
<SelectParamete rs>
<asp:SessionPar ameter Name="value" SessionField="M ySessionVar"
Type="Object" />
</SelectParameter s>
</asp:ObjectDataS ource>
</div>
</form>
</body>
</html>
----
End Default.aspx
MyDataSource.cs :
----
using System;
using System.Data;
using System.Configur ation;
using System.Web;
using System.Web.Secu rity;
using System.Web.UI;
using System.Web.UI.W ebControls;
using System.Web.UI.W ebControls.WebP arts;
using System.Web.UI.H tmlControls;
/// <summary>
/// Summary description for MyDataSource
/// </summary>
public static class MyDataSource
{
private static System.Data.Dat aTable data;
private static void CreateData()
{
data = new System.Data.Dat aTable();
data.Columns.Ad d("ID", typeof(int));
data.Columns.Ad d("Name", typeof(string)) ;
data.Columns.Ad d("Description" , typeof(string)) ;
data.Rows.Add(1 , "Name1", "Description1") ;
data.Rows.Add(2 , "Name2", "Description2") ;
data.Rows.Add(3 , "Name3", "Description3") ;
data.Rows.Add(4 , "Name4", "Description4") ;
}
public static System.Data.Dat aTable FormViewSelect( )
{
if (data == null) {
CreateData();
}
return data;
}
public static System.Data.Dat aTable FormViewSelectW ithSession(MySt ate
value)
{
if (data == null) {
CreateData();
}
return data;
}
public static System.Data.Dat aTable GridViewSelect( )
{
if (data == null) {
CreateData();
}
return data;
}
public static System.Data.Dat aTable GridViewSelectW ithSession(MySt ate
value)
{
if (data == null) {
CreateData();
}
return data;
}
public static void GridRowUpdate(i nt id, string name, string description)
{
}
}
----
End MyDataSource.cs
MyState.cs
----
using System;
public class MyState
{
public MyState()
{
Str = String.Empty;
}
public MyState(string str)
{
Str = str;
}
public string Str
{
get { return _str; }
set { _str = value; }
}
private string _str;
}
----
End MyState.cs
--
---
Adar Wesley
