Dataview Custom Load

unknown

I am trying to get a dataview to run with a custom load and having difficulty. Documentation for it is of course sparce  at best. 

Here is an example, I am trying to return a datatable to load the dataview with. ( Lets see if I can get some formatting to work decently here )

On the IDO I add this with a method to accept an input and output parameters. 

On the dataview I select the IDO and the Source name, and setup the parameter with the operator the Method parameter and a description. Selected the properties in the IDO Setup.

The dataview loads with no error, and also with no data. 

A point in the right direction would be amazing! 

(Code is just an example, property names and such are not correct, but should get the idea)

namespace namespace

{

    [IDOExtensionClass("ue_IdoName")]

    public class PurchasingFlowdowns : ExtensionClassBase

    {

        public override void SetContext(IIDOExtensionClassContext context)

        {

            base.SetContext(context);

        }

        [IDOMethod(MethodFlags.CustomLoad,"infobar")]

        public DataTable IDO_PreloadCollection(string material)

        {

            //create datatable

            DataTable dt = new DataTable();

            dt.Columns.Add("cust_po");

            dt.Columns.Add("LineItem");

            dt.Columns.Add("LineDueDate");

            dt.Columns.Add("CustomerName");

            dt.Columns.Add("CNum");

            dt.Columns.Add("co_num");

            dt.Columns.Add("PAS");

            dt.Columns.Add("material");

            // Load the datatable with the data from the IDO

            try

            {

                DataRow row;

                string filter = $"material = {material}";

                var flowDown = this.Context.Commands.LoadCollection(

                    "ue_IdoName"

                    , "cust_po,LineItem,LineDueDate,CustomerName,CNum,co_num,PAS,material"

                    , $"{filter}"

                    , ""

                    , 0);

                for (int index = 0; index < flowDown.Items.Count; index++)

                {

                    row = dt.NewRow();

                    row["cust_po"] = flowDown[index, "cust_po"].Value;

                    row["LineItem"] = flowDown[index, "LineItem"].Value;

                    row["LineDueDate"] = flowDown[index, "LineDueDate"].Value;

                    row["CustomerName"] = flowDown[index, "CustomerName"].Value;

                    row["CNum"] = flowDown[index, "CNum"].Value;

                    row["co_num"] = flowDown[index, "co_num"].Value;

                    row["PAS"] = flowDown[index, "PAS"].Value;

                    row["material"] = flowDown[index, "material"].Value;

                    dt.Rows.Add(row);

                }

            }

            catch (Exception ex)

            {

                string Infobar = ex.Message;

            }

            return dt;

        }

    }

}

acl

have you tried to setup a normal form with that CLM ? just to see whether it works outside Dataview module