In this example, I will show on how to Dynamically Dropdown Bind Using C#
if (con.State == ConnectionState.Open)
{
con.Close();
}
con.Open();
SqlCommand cmd = new SqlCommand("SELECT Email_Id, Id FROM Admin_Deposit WHERE Status = '" + 1 +"'", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
DropDownList1.DataTextField = "Email_Id";
DropDownList1.DataValueField = "Id";
DropDownList1.DataSource = ds;
DropDownList1.DataBind();