this.dataGridView1[1, 1] = new DataGridViewComboBoxCell();
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
DataGridViewComboBoxCell dgv_cbcell=new DataGridViewComboBoxCell(); dgv_cbcell.Value = null; dataGridView1.Rows[e.RowIndex].Cells[2] = dgv_cbcell; dataGridView1.Rows[e.RowIndex].Cells[2].ValueType = dgv_cbcell.ValueType;
DataGridViewComboBoxCell value is not valid
var
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