title: Set selectedValue in DataGridViewComboBoxColumn
body: <p>I have two tables: columns and tables (foreign key - Table_ID). I want to show columns in dataGridView with combobox. In combobox to be displayed related table (name tables) and selected item be value that set in columns.</p>
  
  <pre><code>List&lt;columns&gt; columns = DataLoader.GetColumns();
  List&lt;tables&gt; tables = DataLoader.GetTables();
  
  this.editingDataGridView.DataSource = columns; // my dataGridView
  DataGridViewComboBoxColumn comboBoxColumn = new DataGridViewComboBoxColumn();
  
  comboBoxColumn.DisplayMember = "Table_Name";
  comboBoxColumn.ValueMember = "Table_ID";
  comboBoxColumn.DataSource = tables;
  
  //add combobox column in dataGrid
  this.editingDataGridView.Columns.Add(comboBoxColumn);
  
  //AND this i want set value
  int index = this.editingDataGridView.Columns.IndexOf(comboBoxColumn);
  for (int i = 0; i &lt; columns.Count; i++)
  {
     this.editingDataGridView.Rows[i].Cells[index].Value = columns[i].Table_ID;
  }
  </code></pre>
  
  <p>After run, I get gridView with combobox column with dataSource, but without selected default value!
  <img src="https://i.stack.imgur.com/h05Fr.png" alt="enter image description here"></p>