Required Field Validator in RadGrid

[Corey]

I have a radgrid using inplace editting inside of an ajaxpanel.

I need to have a requiredfieldvalidator to prevent a field entry in the radgrid.

Can this be done?  I've removed the ajaxpanel and had the same issue.

[Jayesh Goyani]

Hello COREY,

Grid / Flexible Server-Side Validation

or

<rad:RadGrid id="RadGrid1" runat="server" AutoGenerateColumns="False">
<MasterTableView>
   <Columns>
   <rad:GridBoundColumn UniqueName="ContactName" HeaderText="ContactName" DataField="ContactName"></rad:GridBoundColumn>
   <rad:GridEditCommandColumn UniqueName="EditCommandColumn"></rad:GridEditCommandColumn>
   </Columns>
</MasterTableView>
</rad:RadGrid>

private void RadGrid1_ItemCreated(object sender, Telerik.WebControls.GridItemEventArgs e)
{
  if(e.Item is GridEditableItem && e.Item.IsInEditMode)
  {
     GridEditableItem item = e.Item as GridEditableItem;
     GridTextBoxColumnEditor editor = (GridTextBoxColumnEditor)item.EditManager.GetColumnEditor( "ContactName");
     TableCell cell = (TableCell)editor.TextBoxControl.Parent;

     RequiredFieldValidator validator = new RequiredFieldValidator();
     editor.TextBoxControl.ID = "ID_for_validation";
     validator.ControlToValidate = editor.TextBoxControl.ID;
     validator.ErrorMessage = "*";
     cell.Controls.Add(validator);
  }
}

Let me know if any concern.

Thanks,
Jayesh Goyani

[Twan]

This described solution is broken when upgrading from 2012.4.411.40 to 2013.2.717.40.
A follow up call (OnDataBind) will throw Object reference not set to instance of an object.

[Shinu]

Hi,

The above code snippet is for versions before Q1 2013.So please try the below code snippet.

ASPX:

<telerik:GridBoundColumn DataField="ShipCity" HeaderText="ShipCity" UniqueName="ShipCity" />

 C#:

if (e.Item is GridEditableItem && e.Item.IsInEditMode)
       {
           GridEditableItem item = e.Item as GridEditableItem;
           GridTextBoxColumnEditor editor = (GridTextBoxColumnEditor)item.EditManager.GetColumnEditor("ShipCity");
           TableCell cell = (TableCell)editor.TextBoxControl.Parent;
           RequiredFieldValidator validator = new RequiredFieldValidator();
           validator.ControlToValidate = editor.TextBoxControl.ID;
           validator.ErrorMessage = "*";
           cell.Controls.Add(validator);
       }

You can also have a look at this documentation on Validation.

Thanks,
Shinu

[Twan]

That C# code is what is causing the bug not the .aspx

[Shinu]

Hi Twan

The C# code was working fine at my end,have you tried the same code.The version im using is 2013.2.611.40.Please try the code in the documentation for the latest version.There are two codes for versions before Q1 2013 and after.So make sure you have used the right code.
If this doesn't help,please provide your full code.

Thanks,
Shinu

[Twan]

Hey,

I have found the problem in our code. In a previous implementation it was recommended to set the id of the column editor in order for the required field validator to work. It was a line like this:

editor.TextBoxControl.ID = "someId";

The same goes for DropDown editor. Removing this line fixed the issue.

Regards,

Twan

[Mohd]

<telerik:GridTemplateColumn HeaderText="Completion Date" UniqueName="CompletionDate"
                                        DataType="System.DateTime" SortExpression="CompletionDate">
                                        <ItemTemplate>
                                            <asp:Label runat="server" ID="CompletionDateLabel"  DataFormatString="{0:d}"  Text='<%# Eval("CompletionDate") %>'>
                                            </asp:Label>
                                        </ItemTemplate>
                                        <EditItemTemplate>
                                            <telerik:RadDatePicker ID="CompletionDatePicker" runat="server" DbSelectedDate='<%# Bind("CompletionDate") %>'>
                                            </telerik:RadDatePicker>
                                            <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="*"
                                                ControlToValidate="CompletionDatePicker"></asp:RequiredFieldValidator>
                                        </EditItemTemplate>
                                    </telerik:GridTemplateColumn>


This works for me

[Mohd]

<telerik:GridTemplateColumn HeaderText="Completion Date" UniqueName="CompletionDate"
                                        DataType="System.DateTime" SortExpression="CompletionDate">
                                        <ItemTemplate>
                                            <asp:Label runat="server" ID="CompletionDateLabel"  DataFormatString="{0:d}"  Text='<%# Eval("CompletionDate") %>'>
                                            </asp:Label>
                                        </ItemTemplate>
                                        <EditItemTemplate>
                                            <telerik:RadDatePicker ID="CompletionDatePicker" runat="server" DbSelectedDate='<%# Bind("CompletionDate") %>'>
                                            </telerik:RadDatePicker>
                                            <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="*"
                                                ControlToValidate="CompletionDatePicker"></asp:RequiredFieldValidator>
                                        </EditItemTemplate>
                                    </telerik:GridTemplateColumn>