How to fill datagridview combobox value in c# .net windows application?

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C#

Hello,

I want to fill datagridview combobox column but This code it's not running properly,
this code generate every rows for every text of combobox value, it's not running properly.

Please help me.

SqlConnection con = new SqlConnection(cnString1);//connection to the your database
                SqlCommand cmd = new SqlCommand("fetchUUSLaminateName", con);//create a SQL command object by passing name of the stored procedure and database connection 
                cmd.CommandType = CommandType.StoredProcedure;//set command object command type to stored procedure type

                SqlDataAdapter adp = new SqlDataAdapter(cmd);//create SQL data adapter with command object
                DataTable dt = new DataTable();//create a data table to hold result of the command
                //DataGridViewComboBoxColumn dgvcmb = new DataGridViewComboBoxColumn();

                if (con.State == ConnectionState.Closed)//check whether connection to database is close or not
                    con.Open();//if connection is close then only open the connection
                adp.Fill(dt);//data table fill with data by calling the fill method of data adapter object
                if (dt.Rows.Count > 0)//check whether data table contain any row or not
                {
                    
                    LamiName.DataSource = dt;
                    LamiName.ValueMember = "UUSLaminateName";
                    LamiName.DisplayMember = "UUSLaminateName";
                    dgvUUSKreationPriceCalculator.DataSource = dt;
                    if (con.State == ConnectionState.Open)
                        con.Close();
                }