RadGrid Custom Filter

Question

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

Forgot to Edit This

I solved this problem weeks ago...I had to set the "EnableLinqExpressions" property to false under the RadGrid.

Answer 1

I saw this as a fix for this question somewhere.

Try adding: RadGrid1.EnableLinqExpressions = false;