Validate field outside from grid

[Kien Lim]

I need some help for the scenario below:

I have a telerik grid with GridTemplateColumn. This GridTemplateColumn contains telerik combox called "radTravelType" in the EditItemTemplate. This combobox has 3 RadComboBoxItem which are "Taxi", "Car" and "Public Transport". When I select "car" option, a field called "Vehicle No." should be validated(cannot be empty). however this vehicle no. field is not a field within the grid. How can I achieve this?

[Shinu]

Hello,

I am not quite sure about your aspx and I assume that  the ComboBox is inside EditItemTemplate and the VehicleNo is a TextBox which should not be empty if the ComboBox selected item is car and you want to validate when submitting the page.

If that is the case, there are many approaches to achieve the same. One approach is to use the CustomValidator and declare a global variable say "flag" .Attach the OnClientSelectedIndexChanged event to the ComboBox and set the flag value if the ComboBox selected item is "car".

Javascript:

var flag=0;
function OnClientSelectedIndexChanged(sender, args)

{

if(args.get_item().get_text()=="car")

{

flag=1//set the flag value

}

}

function ClientValidationFunction(sender,args)

{

//checks for the flag value

   if(flag==1)

   {

     //access the text box and set the args.IsValid accordingly.

    }

}

Thanks,
Shinu.

[Kien Lim]

Hi Shinu,

Thanks for your help, I opt for Custom validator and validate at code-behind. It is working fine as well.

I was also looking for some client -side calculation in grid cell. For example: when I key in price per unit and quantity in edititemtemplate, it should calculate the total within the grid. Can you show me some sample code?

Many thanks

[Tsvetina]

Hello Kien Lim,

You can try modifying the approach demonstrated in the following help article in order to fit your needs:
RadNumericTextBox for Footer Totals

Greetings,
Tsvetina
the Telerik team