Category: .NET 2.0

Shiny new thing to eat up bandwidth!

I’m a solo developer in a corporate environment, so I’m really on my own to learn new things.  As good as blogs and books are, there’s sometimes no substitute for being shown how.  That’s why Microsoft highlights so many videos on its asp.net site.  ASP Alliance also has a growing library of videos.

Enter onto this list one more site–DotNetVideos.net.  Right now there are around 100 videos on a great number of topics.  Apparently there are a couple hundred more in the pipeline.  And, if you sign up now, you get 6 months of ASP.NET Pro magazine for free.  That alone is worth the sign-up.  ASP.NET Pro is one of my favorite trade mags (I have an online subscription, and have for several years).

When you’re Googling for info on whatever you’re working on, don’t forget to check out this site, too, and see if someone is showing you how it’s done.

Full disclosure: I was asked to say something about the new site, and I usually ignore such requests.  But after checking it it, it’s one I’ll be spending some time on, and recommending to others.

(edit – fixed links)

Assuming you don’t actually have both a DataSource and DataSourceId defined on the same control, this may actually be a bug.  My situation is Visual Studio 2008, compiling an application for .NET 2.0.  I tested this with both Enterprise Library 2.0 and Enterprise Library 3.1.  For me, I’m trying to hydrate a RadioButtonList from a dataset, which is created from a stored procedure call with a parameter passed.  If I hardcode some values in the sproc and don’t pass the parameter, it all works fine.  But, if I pass the parameter, I get the error.  I have a workaround in mind, and I’ll post it whenI get it done.

I reported this at http://connect.microsoft.com/, with an issue ID = 323454; the title is “Both DataSource and DataSourceID are defined…”.  If you’re having the same problem, log in and vote for this issue–more votes = higher priority.  The text of my report is below:

I’m using VS 2008 (9.0.21022.8 RTM), compiling for the .NET 2.0 framework.

On a web form, I’ve added a RadioButtonList, as below:

<asp:RadioButtonList ID=”rblShippingPlatform” runat=”server” CssClass=”FormFieldsAjax” />

In code behind, I call a function in a CBO in the same project to hydrate the values:

cPub.fillShippingPlatforms(rblShippingPlatform, cPublic.Segment.Lane)

The function in the CBO makes a call to the DAL, which is a shared library added as a project reference:

    Public Sub fillShippingPlatforms(ByVal rblPlatforms As RadioButtonList, ByVal sSegment As String)
        With rblPlatforms
            .DataSource = cDb.GetShippingPlatforms(sSegment)
            .DataValueField = “ShippingPlatformID”
            .DataTextField = “ShippingPlatform”
            .DataBind()
        End With
    End Sub

The DAL simply executes a stored procedure and returns a dataset:

    Public Function GetShippingPlatforms(ByVal sSegment As String) As DataSet
        dB = DatabaseFactory.CreateDatabase
        cmd = dB.GetStoredProcCommand(“lpGetShippingPlatforms”)

        With dB
            .AddInParameter(cmd, “@Segment”, DbType.String, sSegment)
            Return .ExecuteDataSet(cmd)
        End With

    End Function

There’s nothing fancy here, but when I load the web form, I receive an error stating “Both DataSource and DataSourceID are defined on ‘rblShippingPlatform’. Remove one definition. “.

I can hydrate the RadioButtonList if I adjust the stored procedure and remove the parameter handling.

    Public Function GetShippingPlatforms(ByVal sSegment As String) As DataSet
        dB = DatabaseFactory.CreateDatabase
        Return dB.ExecuteDataSet(CommandType.StoredProcedure, “lpGetShippingPlatforms”)
    End Function

This issue occurs with both the Jan 2006 and May 2007 versions of the Enterprise Library.