Add event handlers on editors

[Lorenzo]

Hello,


I am looking for a way to control when a cell is edited in a GanttViewTextViewCellElement. If certain conditions are met, the old value should be reset. How and when should I add handlers?

I am thinking on the editors of each cellElement but I dont know how to reach them in a way like in Gridview where the CellBeginEdit event is handy for it.

Thanks,
Lorenzo.

[Lorenzo]

Hello again.

I forgot to say that I haven't found an event that appears in the documentation for GanttView controls: "EditorRequired". I suppose that it wold be a nice place to attach an event handler.

Regards,
Lorenzo

[Dess | Tech Support Engineer, Principal]

Hello Lorenzo,

Thank you for writing.

It is possible to perform validation of the editor's valueбъ subscribing to the ValueChanging event for the respective editor. Here is a sample code snippet, demonstrating how to use the GanttViewElement.EditorInitialized event and subscribe to the GanttViewDateTimeEditor.ValueChanging event, which can be canceled when the new value is not valid:

private void GanttViewElement_EditorInitialized(object sender, GanttViewItemEditorInitializedEventArgs e)
{
    GanttViewDateTimeEditor dtEditor = e.Editor as GanttViewDateTimeEditor;
    if (dtEditor != null)
    {
        dtEditor.ValueChanging-=dtEditor_ValueChanging;
        dtEditor.ValueChanging+=dtEditor_ValueChanging;
    }
}

private void dtEditor_ValueChanging(object sender, ValueChangingEventArgs e)
{
    if ("New value is not valid")
    {
           e.Cancel = true;
    }
}

I hope this information helps. Should you have further questions, I would be glad to help.

Regards,
Desislava
Telerik