protected void Grid_ProcessColumnAutoFilter(object sender, ASPxGridViewAutoFilterEventArgs e)
{
if (e.Column.FieldName == "Numbers")
{
switch (e.Kind)
{
case GridViewAutoFilterEventKind.CreateCriteria:
CriteriaOperator co = CriteriaOperator.Parse(Grid.FilterExpression);
if (co is GroupOperator)
{
GroupOperator go = co as GroupOperator;
CriteriaOperator operand = go.Operands.Find(op => op.LegacyToString().Contains("MyNewFunction"));
if (operand is CriteriaOperator)
{
go.Operands.Remove(operand);
}
Grid.FilterExpression = go.LegacyToString();
}
else if (co is CriteriaOperator)
{
string filter = co.LegacyToString();
if (filter.Contains("MyNewFunction"))
{
Grid.FilterExpression = string.Empty;
}
}
if (e.Value.Contains('-'))
{
CriteriaOperator cop = new FunctionOperator(FunctionOperatorType.Custom, "MyNewFunction", e.Value, new OperandProperty("Numbers"));
e.Criteria = cop;
}
break;
case GridViewAutoFilterEventKind.ExtractDisplayText:
default:
break;
}
}
}