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Multiple ComboBoxes in RadGrid

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ComboBox

This is a migrated thread and some comments may be shown as answers.

towpse asked on 16 Oct 2008, 05:02 PM

Hey folks.

I have a grid that may contain 0 or more combo boxes in one of the coumns of each row.

What I am trying to do is validate the data held by each combo when the form is submitted.

Originally I had this:

    
            <telerik:GridTemplateColumn UniqueName="DataValue" DataField="DataValue" SortExpression="DataValue" HeaderText="<%$ Resources:Default, DATA_VALUE_HEADER_TEXT %>">  
        
            <EditItemTemplate> 
        
            <asp:TextBox    ID="txtDataValue"   
        
            runat="server" Text='<%# DataBinder.Eval(Container,"DataItem.DataValue") %>' 
        
            Width="150px">  
        
            </asp:TextBox> 
        
            <asp:RequiredFieldValidator      
        
            ID="rf_txtDataValue"   
        
            runat="server" 
        
            ErrorMessage = "You must enter a value" 
        
            Text = "*" 
        
            Enabled="false" 
        
            Visible= "true" 
        
            ControlToValidate="txtDataValue" 
        
            Display="Dynamic"/>  
        
            <asp:DropDownList ID="ddlDataValue"   
        
            runat="server"   
        
            Width="155px"></asp:DropDownList>                                         
        
            <asp:RequiredFieldValidator     ID="rf_ddlDataValue"   
        
            runat="server" 
        
            ErrorMessage = "You must select a value" 
        
            Text = "*" 
        
            Enabled="false" 
        
            Visible= "true" 
        
            InitialValue ="<%$ Resources:Default, DEFAULT_LIST_ITEM_VALUE %>" 
        
            ControlToValidate="ddlDataValue" 
        
            Display="Dynamic" /> 
        
            </EditItemTemplate> 
        
            </telerik:GridTemplateColumn>

I want to change the drop down list to a telerik combo box. Items will inserted into the combo box dynamically.
I'd like to validate the selection using some kind of validator. I saw examples of validating telerik combos using custom validators.

If I use custom validators it seems like I could use one validator where the validator method could simply iterate through the grid looking to see if a combo is enabled in the row and then check to see if it has a valid value; if not it could set the text of a label that sits beside the combo, using find control of the row, to a red * or something.

A nicer implementation might be, I would think, if each combo had it's own custom validator where the validator method can get the client side instance of the telerik combo that it is set to validate; or the combo that is in the same grid row as the validator that is doing the validation. That way if it is invalid the validator will simply show itself as a red *. Can the custom validator get a specific instance of a combo? Is this solution possible?

Thanks.

mat.t.

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