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How to Fill ComboBox with Data inside the DataGridView in C# and MS Access Database

This time, I will teach you how to fill combobox with data in the datagridview in C# and MS Access Database. This is very useful most especially when you are dealing with combo box and datagridview control. In this way, you can manipulate the data inside a combobox easily.

Creating Application

Step 1

Open Microsoft Visual Studio 2015 and create a new windows form application in C#.

Step 2

Do the form just like shown below.

Step 3

Press F7 to open the code editor. In the code editor, add a namespace for OLeDB to access OLeDB libraries.

  1. using System.Data.OleDb;

Step 4

Create a connection between the access database and c#. After that, declare all the classes that are needed.

  1. OleDbConnection con = new OleDbConnection("Provider = Microsoft.ACE.OLEDB.12.0; Data Source =" + Application.StartupPath + "/studentdb.accdb");
  2. OleDbCommand cmd;
  3. OleDbDataAdapter da;
  4. DataTable dt;
  5. string sql;

Step 5

Create a method for adding the comboxbox column with data in the datagridview.

  2. private void fill_combo(string sql)
  3. {
  4. try
  5. {
  6. con.Open();
  8. cmd = new OleDbCommand();
  9. da = new OleDbDataAdapter();
  10. dt = new DataTable();
  11. DataGridViewComboBoxColumn cbo = new DataGridViewComboBoxColumn();
  13. cmd.Connection = con;
  14. cmd.CommandText = sql;
  15. da.SelectCommand = cmd;
  16. da.Fill(dt);
  18. cbo.HeaderText="Name";
  19. cbo.DataSource = dt;
  20. cbo.ValueMember = "ID";
  21. cbo.DisplayMember = "fname";
  23. dataGridView1.Columns.Add(cbo);
  25. }
  26. catch(Exception ex)
  27. {
  28. MessageBox.Show(ex.Message);
  29. }
  30. finally
  31. {
  32. con.Close();
  33. da.Dispose();
  34. }
  35. }

Step 6

Do the following codes to execute the method that you have created in the first load of the form.

  2. private void Form1_Load(object sender, EventArgs e)
  3. {
  4. sql = "Select * From tblstudent";
  5. fill_combo(sql);
  6. }

Download the complete sourcecode and run it on your computer.
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