vb.net dropdownlist looses it's datasource on pageload or postback

Question

I have a problem with dropdownlist when a button is pressed the bounded data will disappear!
I have absolutely no idea why this is like this!
I have other page that has a bound dropdownlist data as well and it works great but this one get disappear bounded content on page load after pressing the button!
As requested here's my full .vb code
As My files are huge I'm giving you the full link to these files
http://www.mediafire.com/view/8v5e5yjkdpg5780/admin_report.aspx.vb
http://www.mediafire.com/view/xlgt7c2v523rsti/admin_report.aspx

thanks in advance

Answer 1

why you set EnableViewState="False" on P tag ? try with removing EnableViewState="False" from P tag.

Answer 2

Try this

 <asp:DropDownList ID="DDL2" runat="server" Style="font-size: 12px;
                color: #0066cc; font-family: Tahoma; direction: rtl;" Width="100px" 
                AppendDataBoundItems="True" >

REMOVE

  AppendDataBoundItems="True" from above 

Answer 3

add ValueField also:

Sub DGDataBind()
    Dim adapter As Data.SqlClient.SqlDataAdapter
    adapter = New Data.SqlClient.SqlDataAdapter("LoadSomething", connection)
    adapter.SelectCommand.CommandType = Data.CommandType.StoredProcedure
    Dim param As New Data.SqlClient.SqlParameter("@something1", Data.SqlDbType.Bit)
    param.Value = 1
    adapter.SelectCommand.Parameters.Add(param)
    param = New Data.SqlClient.SqlParameter("@something2", Data.SqlDbType.Bit)
    param.Value = 0
    adapter.SelectCommand.Parameters.Add(param)
    GlobalVariables.datas.Clear() 'Public Class GlobalVariables Public Shared datas As New Data.DataSet
    adapter.Fill(GlobalVariables.datas)
    DDL1.DataSource = GlobalVariables.datas.Tables(0)
    DDL1.DataTextField = "rptname"
    DDL1.DataValueField = "ColumnName"
    DDL1.DataBind()
    DDL1.Items.Insert(0, New ListItem("empty", "0"))
    DDL1.SelectedIndex = 0
    DDL2.DataSource = GlobalVariables.datas.Tables(0)
    DDL2.DataTextField = "rptname"
    DDL2.DataValueField = "ColumnName"
    DDL2.DataBind()
 End Sub

and page load should be like:

If Not IsPostBack Then
DGDataBind()
End If

Here is the Problem In Your Code: As IsPostBack is Property not a method

and don't use inline style, create a css class then use it. as below:

CSS Code:

<style>
.ddl1
{
    font-size: 12px;
    color: #0066cc; 
    font-family: Tahoma; 
    direction: rtl;
    width=100px;

    }
</style>

and HTML code is:

<asp:DropDownList ID="DDL1" CssClass="ddl1" runat="server">
</asp:DropDownList>

hope this will help you