Hi

I have a DataGrid with 2 columns and one of them is a ComboBoxColumn. I have
implemented re-ordering of rows as described in
windowsclient.net/samples//Go%20To%20Market/DataGridView/DataGridView%
If I have selected a value in the ComboBoxColumn and then move that row to a
new position then the selected value in the ComboBoxColumn is not shown.
Instead the underlying datatype - System.Data.DataRow - is shown. How can I
fix that ?

LookupTable is a DataTable. The 2 most relevant methods are listed below.

       private void Form1_Load(object sender, EventArgs e)
       {
           this.dataGridView1.RowCount = 3;

           DataColumn col = new DataColumn("ID", typeof(Int32));
           this.LookupTable.Columns.Add(col);
           col = new DataColumn("Name", typeof(string));
           this.LookupTable.Columns.Add(col);
           DataRow row = this.LookupTable.NewRow();
           row[0] = 1;
           row[1] = "aa";
           this.LookupTable.Rows.Add(row);
           row = this.LookupTable.NewRow();
           row[0] = 2;
           row[1] = "bb";
           this.LookupTable.Rows.Add(row);

           DataGridViewComboBoxColumn c = this.dataGridView1.Columns[0] as
DataGridViewComboBoxColumn;
           if (null == c)
               return;
           // bind the DataGridViewComboBoxColumn to the DataTable
           (this.dataGridView1.Columns[0] as
DataGridViewComboBoxColumn).DataSource = this.LookupTable;
           (this.dataGridView1.Columns[0] as
DataGridViewComboBoxColumn).ValueMember = "ID";
           (this.dataGridView1.Columns[0] as
DataGridViewComboBoxColumn).DisplayMember = "Name";

       }

       private void dataGridView1_DragDrop(object sender, DragEventArgs e)
       {
           // The mouse locations are relative to the screen, so they must
be
           // converted to client coordinates.
           Point clientPoint = this.dataGridView1.PointToClient(new
Point(e.X, e.Y));

           // Get the row index of the item the mouse is below.
           rowIndexOfItemUnderMouseToDrop =
               this.dataGridView1.HitTest(clientPoint.X,
clientPoint.Y).RowIndex;

           // If the drag operation was a move then remove and insert the
row.
           if (e.Effect == DragDropEffects.Move)
           {
               DataGridViewRow row =
e.Data.GetData(typeof(DataGridViewRow)) as DataGridViewRow;
               try
               {
                   DataRow rowToMove = this.LookupTable.Rows[row.Index];
                   DataRow newRow = this.LookupTable.NewRow();
                   newRow.ItemArray = rowToMove.ItemArray;

                   this.LookupTable.Rows.RemoveAt(row.Index);
                   this.LookupTable.Rows.InsertAt(newRow,
rowIndexOfItemUnderMouseToDrop);
                   
                   
dataGridView1.Rows.Insert(rowIndexOfItemUnderMouseToDrop, rowToMove);

                   this.dataGridView1.Refresh();
               }
               catch (Exception ex)
               {
                   
System.Diagnostics.Trace.WriteLine("dataGridView1_DragDrop failed: " +
ex.ToString());
               }
           }
       }