Just for the sake of it..

Grouping ran.. not sure what it was that it caused problems on my side ..

But here is a sample of how to add grouping based on VWG 6.4 B1c 

DataTable mTable = new DataTable();

            mTable.Columns.Add("Col1");

            mTable.Columns.Add("GroupName");

            //add a serie of groups

            for (int i = 0; i < 10; i++)

            {

                listView1.Groups.Add(i.ToString(),i.ToString());

            }

            //add a serie of itemes per group to a table.

            foreach (ListViewGroup mG in listView1.Groups)

            {

                for (int i = 0; i < 10; i++)

                {

                    DataRow mr = mTable.NewRow();

                    mr[0] = "row " + i.ToString();

                    mr[1] = mG.Name;

                    mTable.Rows.Add(mr);

                }

            }

 //set the datasource 

            listView1.DataSource = mTable;

            //set the group for each listviewitem

            foreach (ListViewItem mitem in listView1.Items)

            {

                mitem.Group = listView1.Groups[((mitem.Tag) as DataRowView)[2].ToString()];

            }

            

Version : 6.1 beta1c

 But a problem resides ..

Hi Michael,

I hope I understand your comment correctly when I assume that all is ok with this sample code right now ?

Anyway, I tested it on both 6.4.0Beta1b and Beta2 and found it to run fine, except for a minor correction on the last line of your code, where you should replace the "[2]" with a "[1]" to get the group. Otherwise you'll get a runtime error as there are only two columns.

Palli