hi All,

i have this dropdowlist which brings info from DB 

<asp:DropDownList ID="DropDownList1" runat="server" 
        DataSourceID="SqlDataSource1" DataTextField="description" 
        DataValueField="id" AutoPostBack="true">
    </asp:DropDownList>
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
        ConnectionString="<%$ ConnectionStrings:con%>" 
        SelectCommand="SELECT [Id], [description] FROM [table]">
    </asp:SqlDataSource>

code behind

DropDownList1.DataTextField = "description";
            DropDownList1.DataValueField = "Id";
            DropDownList1.DataBind();

            SqlConnection connection = new SqlConnection(strcon);
            Label1.Text = DropDownList1.SelectedValue;
            SqlCommand command = new SqlCommand("SELECT imagename,Id from [table] where Id=@id", connection);
            command.Parameters.Add("@id", DropDownList1.SelectedValue);
            SqlDataAdapter daimages = new SqlDataAdapter(command);
            DataTable dt = new DataTable();
            daimages.Fill(dt);
            gvImages.DataSource = dt;
            gvImages.DataBind();
            gvImages.Attributes.Add("bordercolor", "black");

now the problem is this part  (Label1.Text = DropDownList1.SelectedValue;)always return the first value which is 1. any help?

Additional info:

if (!IsPostBack)
            {
                BindGridData();
            }