DataGridViewComboBoxCell Binding - “value is not valid”

Question

I\'m trying to bind separate ComboBox cells within a DataGridView to a custom class, and keep getting an error

DataGridViewComboBoxCell value is not v

Answer 1

I am having the same problem. After populating my ComboBox column in the (unbouod) DataGrid, I solved my problem by setting the ValueMember property of the DataGridViewComboBoxColumn Apparently, just relying on the ToString() property of the objects in the ComboBox is not enough.

Actual code:

/// 

/// Populate the dataGridSplitVolumes data grid with all existing qualifications for the plan.
/// 
/// 
private void PopulateDataGridSplitVolumes(Bonus_Group bonus)
{
  try
  {
    List qualifications = Qualification.Load(this.groupBonus.PlanID, this.ConnectionString);
    foreach (Qualification qual in qualifications)
    {
      DataGridViewComboBoxColumn col = (DataGridViewComboBoxColumn)this.dataGridSplitVolumes.Columns[0];
      col.Items.Add(qual);                    
    }
    SplitVolumeGrid_QualificationColumn.ValueMember = "Name";
  }
  catch (Exception ex)
  {
#if DEBUG
    System.Diagnostics.Debugger.Break();
#endif
    throw ex;
  }
}//PopulateDataGridSplitVolumes