I need to bound from query row to a label.text - sql-server

Question

Please look at code below and help me with your experience. I need to pull out company name from query and bound it to the lblCustName.text I tried different method but still I am getting errors. Please help to fix this problem.
public partial class frmMTO : Form
{
static string constring = ConfigurationManager.ConnectionStrings["cfTrack.Properties.Settings.Setting"].ConnectionString;
DataTable mtotbl = new DataTable("tbl");
public frmMTO()
{
InitializeComponent();
}
private void frmMTO_Load(object sender, EventArgs e)
{
btnStart.Enabled = false;
lblCustName.Text = "";
// Binding data to Customers List
SqlConnection con = new SqlConnection(constring);
con.Open();
SqlDataAdapter sda = new SqlDataAdapter("SELECT Quote_No, Company FROM tblRFQ_logs ORDER BY Quote_No DESC", con);
DataTable dt = new System.Data.DataTable();
sda.Fill(dt);
cmRFQ.ValueMember = "id";
cmRFQ.DisplayMember = "Quote_No";
cmRFQ.DataSource = dt;
SqlDataAdapter materiaDA = new SqlDataAdapter("SELECT Grade FROM tblMaterialGrades", con);
DataTable materialDT = new System.Data.DataTable();
materiaDA.Fill(materialDT);
cmMaterial.ValueMember = "Grade_id";
cmMaterial.DisplayMember = "Grade";
cmMaterial.DataSource = materialDT;
// Closing Connection
con.Close();
mtotbl.Columns.Add("ID", typeof(int));
mtotbl.Columns.Add("Material", typeof(string));
mtotbl.Columns.Add("Item Mark", typeof(string));
mtotbl.Columns.Add("Short Code", typeof(string));
mtotbl.Columns.Add("Description", typeof(string));
mtotbl.Columns.Add("Unit", typeof(string));
mtotbl.Columns.Add("QTY.", typeof(string));
mtotbl.Rows.Add(1, "SA-106 B", "N1", "PIP4STD106","4in STD SA-106B, SMLS", "in.", "6");
dataGridView1.DataSource = mtotbl;
}
private void cmRFQ_SelectedValueChanged(object sender, EventArgs e)
{
// here I need to change the label text
lblCustName.Text = "Company" <------ this data comes from query
}
Thanks for your reply

Answer 1

Assuming that you bind the selected index change to this function.
cmRFQ.SelectedIndexChanged += new System.EventHandler(list_SelectedIndexChanged);
I think what you're looking for is this:
protected void list_SelectedIndexChanged(object sender, EventArgs e)
{
DropDownList list = (DropDownList)sender;
string value = (string)list.SelectedValue;
lblCustName.Text = value
}