assign multiple combobox to grid

Question

i want to assign two combobox to grid

i am trying and trying assign multiple combobox to grid 

i want to assign item_name and item_category combobox to grid

please help

 

Code

        public Form1()
        {
            InitializeComponent();

            using (SqlConnection conn = new SqlConnection("Data Source=0000;Initial Catalog=test;User Id = 0;Password = 0;Integrated Security=false;"))
            {
                SqlCommand sqlComm = new SqlCommand("get_ItemDataFill", conn);
                sqlComm.CommandType = CommandType.StoredProcedure;

                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = sqlComm;
                DataTable result = new DataTable();
                da.Fill(result);

                cmbItemName.DataSource = result;
                cmbItemName.ValueMember = "ITEM_CODE";
                cmbItemName.DisplayMember = "ITEM_NAME";

                cmbItemCategory.DataSource = result;
                cmbItemCategory.ValueMember = "ITEM_CATEGORY";
                cmbItemCategory.DisplayMember = "ITEM_CATEGORY";

                //dataGridView1.
                //DataGridViewComboBoxColumn dgvChb = new DataGridViewComboBoxColumn();
                //dgvChb.HeaderText = "ITEM_CODE";
                //dgvChb.Items.Add(result);
                //dataGridView1.Columns.Add(dgvChb);

            }
        }

store procedure

 

CREATE PROCEDURE get_ItemDataFill
AS
BEGIN
    select    ITEM_CODE,
            ITEM_NAME,
            ITEM_CATEGORY
    from ITEM_MASTER
END
GO

output

ITEM_CODE    ITEM_NAME    ITEM_CATEGORY
1                        AAA                    A
2                        BBBB                 B
3                        CCC                   C