[Solved] Cancel grid postback client-side

[Polaris431]

In my grid I have a FormTemplate and use an ImageButton for both the Update and Canel:

<asp:ImageButton ID="imgUpdate" runat="server" ImageUrl="~/images/Update.gif" ToolTip="Update Record"
  Style="padding-right: 5px" CommandName="Update" OnClientClick="OnSessionUpdate(this)" />
<asp:ImageButton ID="imgCancel" runat="server" ImageUrl="~/images/Cancel.gif" ToolTip="Cancel Editing"
  CommandName="Cancel" />

I want to implement my own client-side validation mechanism. When the user clicks the Update button I use the OnClientClick event to call a function where I validate various controls within the FormTemplate. If the validation determines that the user must enter some data, I want to cancel the grid calling the ItemCommand event on the server-side. I have not found any means by which I can cancel the grid from calling the ItemCommand event (or any other event for that matter).

How can I cancel the grid from doing a postback?

Thanks
Johann

[Veli]

Hi Polaris431,

You can define your image button's OnClientClick event handler as:

OnClientClick="return OnSessionUpdate(this)"

and if you want to cancel updating simply return false from your javascript function.

Greetings,
Veli
the Telerik team

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