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I have DataGridViewComboBoxCell and a DataTable. The data in Table I bound with DataGridViewComboBoxCell using DataSource and set ValueMember, and DisplayMember. private void Form1_Load(object sender, EventArgs e) { DataGridViewComboBoxCell comboBoxCell = new DataGridViewComboBoxCell(); dataGridView1.Rows[0].Cells[0] = comboBoxCell; comboBoxCell.DataSource = dataTable; comboBoxCell.ValueMember = "ID"; comboBoxCell.DisplayMember = "Item"; } How can I programmatically set the value in the cell when the form loads? In the simple ComboBox I know a property SelectedIndex. I tried comboBoxCell.Value = ...; but it gives an exception. And tried private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) { e.Value = 1; } It sets a new value in the cell, but I need to select a value. Form loaded and I have empty cell. And some data in the ComboBox. When I put this code dataGridView1.Rows[0].Cells["ComboColumn"].Value = "1"; right after comboBoxCell.DisplayMember = ... (see above), it works fine. The value "1" in the ID column corresponds to the value "Second" in the Items column.So, I get the correct result. Sorry for my English and my newbie code :)

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