Heres the issue,  Im using the Calendar popup control in the gridview Item Template, when i go to select a date it puts in 1/1/0001 as the date.

Code  for the Gridview template , the textbox is binding to object datasource.

protected void Calendar1_SelectionChanged(object sender, EventArgs e)

{

PopupControlExtender.GetCurrent(this.Page).Commit(Calendar1.SelectedDate.ToShortDateString());

}

I figured it out, by puting the panel outside of the Item Template, on the main form, but keeping the popup control extender inside the item template with the textbox. This works.

After updating to the ajax beta1 and the ajax toolkit, the popupcontrol extender doesnt work in the Item template at all. Right when i just got it to work with the old stuff, they had to change the extenders.  Anyone get a popup control extender to work in an item template on the ajax beta1 and ajax toolkit?

The GridView below "sort of works". Except for the following very frustrating things:

1. The calendar shows up positioned below the date TextBox1 immediately upon going to Edit Mode on the grid (I want it to only show when cursor placed in TextBox1).
2. I can't figure out how to set Calendar1 VisibleDate property to the initial value of the the TextBox1. I want the date from the database to be Visible in the calendar when it pops up.

Let me know if you guys make any progress. 

         <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"
            AutoGenerateColumns="False" DataKeyNames="TaskID" DataSourceID="ObjectDataSource2"
            PageSize="5">
            <Columns>
               <asp:CommandField ShowEditButton="True" />
               <asp:BoundField DataField="Sequence" HeaderText="Sequence" SortExpression="Sequence" />
               <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
               <asp:CheckBoxField DataField="Complete" HeaderText="Complete" SortExpression="Complete" />
               <asp:TemplateField HeaderText="DateStarted" SortExpression="DateStarted">
                  <EditItemTemplate>
                     <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("DateStarted") %>'></asp:TextBox>
                     <atlas:PopupControlExtender ID="pce1" runat="server" PopupControlID="Panel1" Position="right"
                        TargetControlID="TextBox1" />
                     <asp:Panel ID="Panel1" runat="server">
                        <asp:Calendar ID="Calendar1" runat="server" BackColor="White" BorderColor="#3366CC"
                           CellPadding="1" DayNameFormat="Shortest" Font-Names="Verdana" Font-Size="8pt"
                           ForeColor="#003399" Height="200px" Width="220px" BorderWidth="1px" OnSelectionChanged="Calendar1_SelectionChanged">
                           <SelectedDayStyle BackColor="#009999" Font-Bold="True" ForeColor="#CCFF99" />
                           <TodayDayStyle BackColor="#99CCCC" ForeColor="White" />
                           <SelectorStyle BackColor="#99CCCC" ForeColor="#336666" />
                           <WeekendDayStyle BackColor="#CCCCFF" />
                           <OtherMonthDayStyle ForeColor="#999999" />
                           <NextPrevStyle Font-Size="8pt" ForeColor="#CCCCFF" />
                           <DayHeaderStyle BackColor="#99CCCC" ForeColor="#336666" Height="1px" />
                           <TitleStyle BackColor="#003399" BorderColor="#3366CC" Font-Bold="True" BorderWidth="1px"
                              Font-Size="10pt" ForeColor="#CCCCFF" Height="25px" />
                        </asp:Calendar>
                     </asp:Panel>
                  </EditItemTemplate>
                  <ItemTemplate>
                     <asp:Label ID="Label1" runat="server" Text='<%# Bind("DateStarted") %>'></asp:Label>
                  </ItemTemplate>
               </asp:TemplateField>
               <asp:TemplateField HeaderText="DateFinished" SortExpression="DateFinished">
                  <EditItemTemplate>
                     <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("DateFinished") %>'></asp:TextBox>
                  </EditItemTemplate>
                  <ItemTemplate>
                     <asp:Label ID="Label2" runat="server" Text='<%# Bind("DateFinished") %>'></asp:Label>
                  </ItemTemplate>
               </asp:TemplateField>
            </Columns>
         </asp:GridView>