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Jan 5, 2006

After some help from the folks in the Security forum, I have some of the answer I need. Hopefully someone here can help me figure out the best method of using that information to find a final solution.

To start, here's a brief synapsis: I'm developing an App in ASP.NET 2.0, using forms-based authentication and the Login Control. I am able to login fine as far as I can tell, since I am able to proceed to the destinationURL without error. From there, I button click to the application in question. Here is where I have the problem.

I want to run a select query on a SQL table where a field = the current user's Username. I cannot find any examples of doing this. I have managed to figure out how to retrieve the current user's username via the Membership.GetUser method, but I can't seem to figure out how to apply that to my SqlDataSource Control and get a valid response.

a snippet of my control's code follows:

<script runat="server"> - This is run inline, not code-behind
Protected memUser As MembershipUser



Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
memUser = Membership.GetUser()
End Sub
</script>

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:SWGToolsetConnectionString %>"
SelectCommand="SELECT [CharacterName] FROM [Characters] WHERE ([UserID] = '<% =Server.HtmlEncode(memUser.Username) %>')">
</asp:SqlDataSource>

If anyone can tell me what I can or should be doing differently, I would appreciate it.

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It appears that the problem is that the value for the Type property of the Parameter (which was generated by the SqlDataSource wizard) is Object which maps to 'sql_variant' rather than to 'timestamp'.
I know that the older way of doing things with SqlDataAdapter, SqlCommand, SqlParameter can handle timestamps because SqlParameter has a SqlDbType property that can have a value of SqlDbType.Timestamp, but I don't see how to do this with the newer SqlDataSource, Parameter classes because the Parameter.Type property (of type TypeCode) doesn't have a Timestamp value.
Has anyone been able to use a 'timestamp' type field with SqlDataSource?
Here's my sample code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MyTestPage.aspx.cs" Inherits="MyTestPage" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"><title>Untitled Page</title></head><body><form id="form1" runat="server"><div><asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"EmptyDataText="There are no data records to display." DataKeyNames="MyID"><Columns><asp:CommandField ShowEditButton="True" /><asp:BoundField DataField="MyID" HeaderText="MyID" InsertVisible="False" ReadOnly="True"SortExpression="MyID" /><asp:BoundField DataField="MyDesc" HeaderText="MyDesc" SortExpression="MyDesc" /></Columns></asp:GridView><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConflictDetection="CompareAllValues"ConnectionString="<%$ ConnectionStrings:CtrlConnectionString1 %>" DeleteCommand="DELETE FROM [MyTest] WHERE [MyID] = @original_MyID AND [MyDesc] = @original_MyDesc AND [timestamp] = @original_timestamp"InsertCommand="INSERT INTO [MyTest] ([MyDesc], [timestamp]) VALUES (@MyDesc, @timestamp)" OldValuesParameterFormatString="original_{0}"ProviderName="<%$ ConnectionStrings:CtrlConnectionString1.ProviderName %>" SelectCommand="SELECT [MyID], [MyDesc], [timestamp] FROM [MyTest]"UpdateCommand="UPDATE [MyTest] SET [MyDesc] = @MyDesc WHERE [MyID] = @original_MyID AND [MyDesc] = @original_MyDesc AND [timestamp] = @original_timestamp"><DeleteParameters><asp:Parameter Name="original_MyID" Type="Int32" /><asp:Parameter Name="original_MyDesc" Type="String" /><asp:Parameter Name="original_timestamp" Type="Object" /></DeleteParameters><UpdateParameters><asp:Parameter Name="MyDesc" Type="String" /><asp:Parameter Name="timestamp" Type="Object" /><asp:Parameter Name="original_MyID" Type="Int32" /><asp:Parameter Name="original_MyDesc" Type="String" /><asp:Parameter Name="original_timestamp" Type="Object" /></UpdateParameters><InsertParameters><asp:Parameter Name="MyDesc" Type="String" /><asp:Parameter Name="timestamp" Type="Object" /></InsertParameters></asp:SqlDataSource></div></form></body></html>

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