RadGrid Custom Filter
- by Aaron
I'm trying to add a custom filter to my RadGrid. I have a column, vendNum, which I want to allow users to filter on multiple vendNums with a comma-separated list. Basically, I want the same functionality as an "in" statement in SQL (where vendNum in (X,Y,Z)).
I followed the tutorial on this site and came up with the following code to place in my RadGrid1_ItemCommand event.
protected void RadGrid1_ItemCommand(object source, GridCommandEventArgs e)
{
if (e.CommandName == RadGrid.FilterCommandName)
{
Pair filterPair = (Pair)e.CommandArgument;
switch (filterPair.Second.ToString())
{
case "vendNum":
TextBox tbPattern = (e.Item as GridFilteringItem)["vendNum"].Controls[0] as TextBox;
if (tbPattern.Text.Contains(","))
{
string[] values = tbPattern.Text.Split(',');
if (values.Length >= 2)
{
e.Canceled = true;
StringBuilder newFilter = new StringBuilder();
for (int i = 0; i < values.Length; i++)
{
if (i == values.Length - 1)
newFilter.Append("[vendNum] = " + values[i]);
else
newFilter.Append("[vendNum] = " + values[i] + " OR ");
}
if (RadGrid1.MasterTableView.FilterExpression == "")
RadGrid1.MasterTableView.FilterExpression = newFilter.ToString();
else
RadGrid1.MasterTableView.FilterExpression = "((" + RadGrid1.MasterTableView.FilterExpression + ") AND (" + newFilter.ToString() + "))";
RadGrid1.Rebind();
}
}
break;
default:
break;
}
}
}
Doing this, though, keeps giving me an error "Expression Expected" when I try to filter with a comma separated list. I'm still able to filter a single vendNum. My FilterExpression does come out as expected. The code is failing on the RadGrid1.Rebind() statement. Has anyone dealt with this before? Any help is greatly appreciated.
Thanks,
Aaron
