Question

I am trying to display the data from sql into a datagrid as follows:

 try
    {
        SqlConnection xconn = new SqlConnection();
        xconn.ConnectionString = @"Data Source=servername; Trusted_Connection=yes; Database=master";
        xconn.Open();
        string s = "select * from tablename where name=@name";
        SqlCommand ycmd = new SqlCommand(s, xconn);

        ycmd.Parameters.Add("@name", dropdownlistname.SelectedValue);
        SqlDataAdapter da = new SqlDataAdapter(ycmd);

        DataTable dt = new DataTable();
        da.Fill(dt);
        gridview.DataSource = dt;
        gridview.DataBind();
    }
    catch (Exception e2)
    {
        lblresult.Text = e2.Message + "<br />" + e2.StackTrace  ; 
    }

I do not get any exception . However , the grid is not displayed.

Answer 1

try like this….

you can change this depends on your requirement ….

SqlCommand command = new SqlCommand();
command.CommandText = "SELECT * FROM Product WHERE Product.ID=@PROD_ID";
command.Parameters.Add(new SqlParameter("@PROD_ID", 100));

// Execute the SQL Server command...
SqlDataReader reader = command.ExecuteReader();
DataTable tblProducts = new DataTable();
tblProducts.Load(reader);

foreach (DataRow rowProduct in tblProducts.Rows)
{
    // Use the data...
}