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Bind string value to AccessDataSource Parameter

Posted on 2010-11-16
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701 Views
Last Modified: 2012-05-10
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
     Dim sUserID As String = User.Identity.Name
     PermittedAccessList_DS.SelectParameters(0).DefaultValue = sUserID
End Sub

Why doesn't Drop Down List show values based on the Parameter?
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Question by:DLockwood
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8 Comments
 
LVL 21

Expert Comment

by:MogalManic
ID: 34156081
Try calling Databind() on the Dropdown control after setting the parameter.
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Author Comment

by:DLockwood
ID: 34159752
Doesn't fix anything.

Still doesn't work.
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LVL 21

Expert Comment

by:MogalManic
ID: 34159808
Can you post some more snippets of the code?  Specifically the accessdatasource and the droplist.
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Author Comment

by:DLockwood
ID: 34159873
Sure, gimme a second.

Funny thing is that I read I should put my Code Behind into the DDL_Selecting Event. I do not even get that option.
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Author Comment

by:DLockwood
ID: 34159910
DDL:
        <asp:DropDownList ID="DDLTables" runat="server"
            AutoPostBack="True"
            DataSourceID="PermittedAccessList_DS"
            DataTextField="TableSecurity"
            DataValueField="TableSecurity"
            AppendDataBoundItems="True"
            style="text-align:
            center" Width="250px">
            <asp:ListItem Text="Select a Program to Access" Value="" />
        </asp:DropDownList>

DataSource:
<asp:AccessDataSource ID="PermittedAccessList_DS" runat="server"
        DataFile="~/App_Data/OutcomesDB.mdb"
        SelectCommand="SELECT tlkp_TableSecurity.TableSecurity FROM (tlkp_TableSecurity INNER JOIN tlkp_UserSecurity ON tlkp_TableSecurity.ID = tlkp_UserSecurity.TABLE) WHERE (Username = ?) ORDER BY tlkp_TableSecurity.TableSecurity">
        <SelectParameters>
            <asp:Parameter Name="UserName" Type="string"  />
        </SelectParameters>
    </asp:AccessDataSource>

Code Behind:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim sUserID As String = "David"
        PermittedAccessList_DS.SelectParameters(0).DefaultValue = sUserID
        DDLTables.DataBind()
End Sub

DOESN'T WORK
0
 

Author Comment

by:DLockwood
ID: 34159927
OK - So the DDL doesn't have the SELECTING event, it is the data source. Duh!

But, even when I put the code like this, it doesn't work.....

    Private Sub PermittedAccessList_DS_Selecting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceSelectingEventArgs) Handles PermittedAccessList_DS.Selecting
        Dim sUserID As String = "David"
        PermittedAccessList_DS.SelectParameters(0).DefaultValue = sUserID
    End Sub
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Accepted Solution

by:
DLockwood earned 0 total points
ID: 34160049
WOW - I figuredout the problem.

How stupid is this?

Cannot use a complex query with a join. When I change the Select Command Query to be a simple statement "Select [Table], [Username] from [tlkp_UserSecurity] WHERE (Username = ?) ORDER BY t[Table]" then everything works fine.

No error message. No nothing. Just didn't work. What a waste of time.
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Author Closing Comment

by:DLockwood
ID: 34186464
Answered it myself.
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