How to customize combobox and textbox in datagridview

Question

I learn to create form diagnose for expert system. And i design winform like this:

 

Combobox in column 3, and textbox in column 4. 

 

 

 

How to use selectedindex in DataGridViewCheckBoxColumn, get value like (0,2;0,4;0,6;0,8) from combobox and put them to DataGridViewTextBoxColumn one by one in every rows?

 

this my code:

 

private void ShowDBGrid()

{

CONN = new Conn();

SQL = "SELECT * FROM evidence";

try

{

CONN.OpenConn();

MYCMD = new MySqlCommand(SQL);

MYDA = new MySqlDataAdapter(SQL, CONN.MYCONN);

DataSet DS = new DataSet();

MYDA.Fill(DS);

dgvDiagnose.DataSource = DS.Tables[0].DefaultView;

DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();

checkBoxColumn.HeaderText = "";

//checkBoxColumn.Width = 10;

checkBoxColumn.Name = "checkBoxColumn";

dgvDiagnose.Columns.Insert(0, checkBoxColumn);

dgvDiagnose.Columns[1].HeaderText = "";

DataGridViewComboBoxColumn comboBoxColumn = new DataGridViewComboBoxColumn();

comboBoxColumn.HeaderText = "";

//comboBoxColumn.Width = 30;

comboBoxColumn.Name = "comboBoxColumn";

comboBoxColumn.Items.Add("CF User");

comboBoxColumn.Items.Add("Tidak Tahu");

comboBoxColumn.Items.Add("Kemungkinan Besar");

comboBoxColumn.Items.Add("Hampir Pasti");

comboBoxColumn.Items.Add("Pasti");

dgvDiagnose.Columns.Insert(3, comboBoxColumn);

DataGridViewTextBoxColumn textBoxColumn = new DataGridViewTextBoxColumn();

textBoxColumn.HeaderText = "";

textBoxColumn.Width = 30;

textBoxColumn.Name = "textBoxColumn";

dgvDiagnose.Columns.Insert(4, textBoxColumn);

}

catch (Exception)

{

MessageBox.Show("Program error!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);

this.Close();

}

}