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

Submitted by janobe on Monday, April 29, 2019 - 21:23.

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#. psq1

Step 2

Do the form just like shown below. ps2

Step 3

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

using System.Data.OleDb;

Step 4

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

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

Step 5

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

 
        private void fill_combo(string sql)
        {
            try
            {
                con.Open();
 
                cmd = new OleDbCommand();
                da = new OleDbDataAdapter();
                dt = new DataTable();
                DataGridViewComboBoxColumn cbo = new DataGridViewComboBoxColumn();
 
                cmd.Connection = con;
                cmd.CommandText = sql;
                da.SelectCommand = cmd;
                da.Fill(dt); 
 
                cbo.HeaderText="Name";
                cbo.DataSource = dt;
                cbo.ValueMember = "ID";
                cbo.DisplayMember = "fname";
 
                dataGridView1.Columns.Add(cbo);
 
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                con.Close();
                da.Dispose();
            } 
        }

Step 6

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

 
        private void Form1_Load(object sender, EventArgs e)
        {
            sql = "Select * From tblstudent";
            fill_combo(sql);
        }

Download the complete sourcecode and run it on your computer. For any questions about this article. You can contact me @ Email – [email protected] Mobile No. – 09305235027 – TNT Or feel free to comment below

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