How to validate a date filter

[Dexter McCloud]

I have a grid that displays a DateTime field.  The user has the ability to filter this DateTime field. I want to make sure the user enters only valid DateTime values (i.e. 1/1/2010).  So, how can I check the filter?  I wrote the following code in the grid ItemCommand event but I don't know how to complete it.  Can someone tell me which property to check so I can make sure that what the user entered is a valid date?

protected void gridMain_ItemCommand(object sender, GridCommandEventArgs e)
{

  if (e.Item is GridFilteringItem)
  {
      GridFilteringItem FilteringItem = e.Item as GridFilteringItem;

      // what do I do now?
   }

}

[Foenix]

Yes, I can.

protected void gridMain_ItemCommand(object sender, GridCommandEventArgs e)
{
    // Not sure about e.Item is GridFilteringItem, I use usually e.CommandName == "Filter"
    if (e.Item is GridFilteringItem)
    {
        GridFilteringItem FilteringItem = e.Item as GridFilteringItem;

        // what do I do now?
        Pair args = (Pair)e.CommandArgument;

        string columnName = args.Second.ToString();
        GridColumn col = gridMain.MasterTableView.GetColumnSafe(columnName);

        //col.CurrentFilterValue contains user input, so you can validate it
        // Just in case: args.First contains FilteringFunction to be applied
   }
}