设置一个 <select> SQL Server数据库表中的动态下拉列表

Question

I'm trying to setup a dropdown list to pull from a table in a SQL Server database. I am using aspx with code behind to submit data to the SQL Server database. Ultimately, what I need to have happen is to display customer names in a drop down list then submit that data to another database table. Using <asp:DropDownList> is an option but I am submitting the data by the name attribute and I cannot set a specific name to the asp webform object. I have not used php in my form as of yet and would like to stay clear if at all possible.

aspx html code:

<select id="customerName" name="custName" class="txtbxList">
 <option></option>
 <option></option>
 <option></option>
</select>

asp DropDownSOurce and List Tags

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString='<%$ ConnectionStrings:csusaCentralConnection %>' SelectCommand="SELECT [customerNameDD] FROM [customerNameList]"></asp:SqlDataSource>
<asp:DropDownList ID="customerName" CssClass="txtbxList" runat="server" DataSourceID="SqlDataSource1" DataTextField="customerNameDD" DataValueField="customerNameDD"></asp:DropDownList>

My code-behind:

string coName = Request.Form["custName"];
string generalInfo = @"INSERT INTO generalInfo(CustomerName)VALUES(@custName);

        SELECT SCOPE_IDENTITY();
        SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["csusaCentralConnection"].ConnectionString);

        SqlCommand cmd = new SqlCommand(generalInfo, conn);

        //NAME of input field in aspx file

        cmd.Parameters.AddWithValue("custName", coName);

        conn.Open();
        string rowIdentity = cmd.ExecuteScalar().ToString();
        conn.Close();

Answer 1

It looks like you are using the designer to setup your dropdown list data source. Here is how you could do it in code:

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!this.IsPostBack)
        {
            MyLinqToSqlDataContext db = new MyLinqToSqlDataContext();
            var result = from c in db.Customers
                         select g;
            customerName.DataSource = result.ToList();
            customerName.DataTextField = "Name";
            customerName.DataValueField = "ID";
            customerName.DataBind();
            ...
        }
   }

Answer 2

By the looks of it you're most of the way there, you should only need to change this line:

string coName = Request.Form["custName"];

To:

string coName = customerName.SelectedValue;