I am modifying this example to use in my project:
http://demos.telerik.com/aspnet-ajax/grid/examples/dataediting/templateformupdate/defaultcs.aspx

how can I preload  "Title Of Courtesy" combobox from code behind at all and also
considering the fact that in my case it is  a web user control ?  Actually in my case user control  is a grid wrapped in user control
but I did  DataSource and DataBind  interface for it, so it works like a regular bindable control in that respect ).

The values in my user control are different depending on EmployeeId and that is why I need to bind it based on row.

What I am looking to do is something like:
 UserControl.DataSource=Business.Employees.GetContactInfoAsList(EpmployeeId)

but having trouble figuring out which event to use to get a hold of usercontrol on add new row click, also for existing records
I am trying to use RadGrid1_DataBound but item.FindControl (UserControlId) returns NULL when
I do foreach on grid items.

Thank you.

    

I use the demo http://demos.telerik.com/aspnet-ajax/grid/examples/dataediting/templateformupdate/defaultvb.aspx?#qsf-demo-source.
My

 

<EditFormSettings EditFormType="Template">

 

<FormTemplate>

 

<table cellspacing="1" class="style1" width="50%">

 

<tr>

 

<td width="20%">

 

<b>User Details</b>

 

</td>

 

<td>

 

&nbsp;</td>

 

</tr>

 

<tr>

 

<td class="style2">

Network Name:

 

</td>

 

<td class="style2">

 

<asp:TextBox ID="TxtNetworkName" runat="server" Text='<%# Bind("NetworkName") %>' TabIndex="1">

 

</asp:TextBox>

 

</td>

 

</tr>

 

<tr>

 

<td class="style2">

First Name:

 

</td>

 

<td class="style2">

 

<asp:TextBox ID="TxtFirstName" runat="server" Text='<%# Bind("FirstName") %>' TabIndex="2" >

 

</asp:TextBox>

 

</td>

 

</tr>

 

<tr>

 

<td class="style2">

Last Name:

 

</td>

 

<td class="style2">

 

<asp:TextBox ID="TxtLastName" runat="server" Text='<%# Bind("LastName") %>' TabIndex="3">

 

</asp:TextBox>

 

</td>

 

</tr>

 

<tr>

 

<td class="style2">

Phone:

 

</td>

 

<td class="style2">

 

<telerik:RadMaskedTextBox ID="TxtPhone"

 

runat="server" SelectionOnFocus="SelectAll"

 

Text='<%# Bind("Phone") %>' PromptChar="_"

 

Width="120px" Mask="(###) ###-####"

 

TabIndex="4" LabelWidth="">

 

</telerik:RadMaskedTextBox>

 

</td>

 

</tr>

 

<tr>

 

<td class="style2">

Email:

 

</td>

 

<td class="style2">

 

<asp:TextBox ID="TxtEmail" Text='<%# Bind("Email") %>'

 

runat="server" Width="180px"></asp:TextBox>

 

<asp:RegularExpressionValidator ID="emailValidator"

 

runat="server" Display="Dynamic"

 

ErrorMessage="Please, enter valid e-mail address." ValidationExpression="^\s*(([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]{2,5}){1,25})+([;.](([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]{2,5}){1,25})+)*\s*$"

 

ControlToValidate="TxtEmail" TabIndex="5" ForeColor="Red"></asp:RegularExpressionValidator>

 

</td>

 

</tr>

 

<tr>

 

<td class="style2">

Active:

 

</td>

 

<td class="style2">

 

<asp:CheckBox ID="chkUserActive" runat="server" Text='<%# Bind("UserActive") %>' TabIndex="6" />

 

</td>

 

</tr>

 

<tr>

 

<td class="style2">

User Group:

 

</td>

 

<td class="style2">

 

<asp:DropDownList ID="ddlUsergroup" runat="server" SelectedValue='<%# Bind("Usergroup") %>'

 

DataSource='<%# (New string() { "AdminUser", "MainUser", "ReadonlyUser"}) %>' TabIndex="7"

 

AppendDataBoundItems="True">

 

<asp:ListItem Selected="True" Text="Select" Value=""></asp:ListItem>

 

</asp:DropDownList>

 

</td>

 

</tr>

 

<tr>

 

<td class="style2">

 

&nbsp;</td>

 

<td align="left" class="style2">

 

<asp:Button ID="btnUpdate" Text='<%# IIf((TypeOf(Container) is GridEditFormInsertItem), "Insert", "Update") %>'

 

runat="server" CommandName='<%# IIf((TypeOf(Container) is GridEditFormInsertItem), "PerformInsert", "Update")%>'>

 

</asp:Button>

 

<asp:Button ID="btnCancel" Text="Cancel" runat="server" CausesValidation="False"

 

CommandName="Cancel"></asp:Button>

 

</td>

 

</tr>

 

</table>

 

</FormTemplate>

 

</EditFormSettings>

and in my VB page, I use the
Protected Sub RadGrid1_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadGrid1.PreRender
        If (Not Page.IsPostBack) Then
           RadGrid1.EditIndexes.Add(0)
           RadGrid1.Rebind()
        End If
       
 End Sub

But I got error when I run it

 

'ddlUsergroup' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

Please help

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hi,

I tried the code in the Demo and its working fine at my end. Please check this help documentation to know the reason for such error.

Thanks,
Princy.

Hi,
Thanks. Your demo works fine in my said. As you see, I just change the table in the FormTemplate. It is not work. Maybe I misss some reference? What references you have? The add new is fine and the edit can't open after I commment the lines inside of

RadGrid1_PreRender. Also how can I put a checkbox in the FormTemplate. There is no checkbox in your demo. I put one in my samp[le, but not works when I try to add a new record.

Hi,

I'm sorry i couldn't replicate the issue,the references are same as that in the example.
to add a checkbox,you can directly drag and drop a checkbox into the form template,where you want it.
For further reference,I'm attaching my full code where i tried. You can use the same code behind from the demo.
ASPX:
Thanks,
Princy

Hi,
I copy your code and just change some items. I also use your

Protected

Sub RadGrid1_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadGrid1.PreRender

 

If (Not Page.IsPostBack) Then

RadGrid1.EditIndexes.Add(0)

RadGrid1.Rebind()

 

End If

 

End Sub

I got error when I run.

'ddlUsergroup' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value '

If I comment the  lines  inside of RadGrid1_PreRender the RadGrid1 works fine. How?

 

Hi,

The reason for the error you are seeing is that SelectedValue for the DropDownList ddlUserGroup does not exist in the list of items.

As the DropDownList is in an edit template for the RadGrid and Bind() is used to set the SelectedValue the initial value for the DropDownList will be extracted from the RadGrid's data source. You need to ensure that all distinct values from RadGrid's datasource for the column in which the dropdown control resides matches the values of the items of the DropDownList's DataSource.

You would find a sample project where the approach is illustrated. It is working as expected on my side. Notice the definition for the DropDownList in the EditForm template for the RadGrid.

I hope this information would help you solve the issue.

Regards,
Viktor Tachev
Telerik