Chapter 12 Page 414 Try it out

JohnKiller · August 9th, 2010, 01:14 PM

Hello there,

In this try it out, step 4, Add a RequiredFieldValidator in the EditItemTemplate and InsertItemTemplate.... I am confusing about the RequiredFieldValidator ID="reqVal3", I do not think we define the reqVal3 before, And I am not so clear about how the Validator works in this part.

Another question, the same try it out, setp 12, The Binding for SelectedValue part is gray, which means I can not use this part. I do not know what is going on here, so I have to type the code by hand in the Code Behind.

Thanks.

Imar · August 10th, 2010, 03:04 AM

Quote:

I do not think we define the reqVal3 before,

Not before, but *in* the very same step you mention:

Quote:

4 Add a RequiredFieldValidator in the EditItemTemplate and the InsertItemTemplate

of both the Title and the Summary rows. You can enter the code directly, or you can drag and drop it from the Toolbox directly in Markup View. Hook the controls up to the TextBox controls in the template by setting the ControlToValidate property and provide a useful error message. Give all four RequiredFieldValidator controls unique names by setting their ID to reqVal1, reqVal2, and so on.

"And so on" is the key here....

Quote:

The Binding for SelectedValue part is gray,

Is the drop down list place correctly inside in a template? Can you post the code for the page? That makes it a lot easier to see why it doesn't work. If you post code here, please use the Remove Text Formatting button on the toolbar and then wrap the code in code tags (the # button on the toolbar).

Cheers,

Imar

JohnKiller · August 10th, 2010, 01:29 PM

Thank you, Imar.

Below is the part of the code, if you need the whole page of code, just let me know.And I typed the

Code:

SelectedValue='<%# Bind("GenreId") %>'

by myself.

Code:

            <asp:TemplateField HeaderText="GenreId" SortExpression="GenreId">
                <EditItemTemplate>
                    <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="sdsGenres" DataTextField="Name" DataValueField="Id" SelectedValue='<%# Bind("GenreId") %>'>
					</asp:DropDownList>
                </EditItemTemplate>
                <InsertItemTemplate>
                    <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="sdsGenres" DataTextField="Name" DataValueField="Id" SelectedValue='<%# Bind("GenreId") %>'>
					</asp:DropDownList>
                </InsertItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label4" runat="server" Text='<%# Bind("GenreId") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField DataField="UpdateDateTime" HeaderText="UpdateDateTime" 
                SortExpression="UpdateDateTime" Visible="False" />
            <asp:CommandField ShowEditButton="True" ShowInsertButton="True" />

Imar · August 10th, 2010, 01:57 PM

Not sure what the problem is; that code looks fine. Are you doing this in Design View?

Imar

JohnKiller · August 10th, 2010, 02:52 PM

Imar,

I was doing this at the Design View, but the Binding for SelectedValue part is gray, which means I can not use this part. Then I switched to the Source View to add the code by hand. I really do not know what is going on here. Do you need more code, or what should we do.

Thank you.

Imar · August 10th, 2010, 03:01 PM

It's supposed to work as described (just tested it), so somehow, something is wrong on your machine.

You can continue by simply typing in the code as you've done now, or report a bug at the Microsoft Connect web site: http://connect.microsoft.com/

Cheers,

Imar

JohnKiller · August 10th, 2010, 03:17 PM

Ok, Imar, thank you so much for the help.