SqlDataSource / LINQ to SQL to DataSet

Question

Hi Everyone,

I have looked at a number of threads from various sites with similar problems. However, any code posted as a solution I have not been able to get working in the context of my Web App.

I'm having trouble taking a query, whether it be via LINQ to SQL or SqlDataSource and then passing/converting it to a DataSet.

The reason it goes to a DataSet is because I have also taken an example of a paging Repeater that uses DataSet but reads an XML. Implementing it would cut down on loading time as there'll be a lot of records in the Repeater thus makes it easier for the end-user.

I'm completely baffled on this, my last attempt, in the code below, I try taking the results from a SQL Query and creating an XML from the them, to which the DataSet.ReadXML() method can read, this is a long inefficient way to do it and even so, it doesnt work at that.

My preferred way would be to take the results from a 'Guestbook.GetModerated()' method I have ready via LINQ to SQL which returns results in the form of a Generic list and pass that through etc. ...something like DataSet items = Guestbook.GetModerated(); That returns a error stating it cannot convert Generic List to DataSet and I dont know how to convert it

Any help is much appreciated.

public void ItemsGet()
{
    DataSet Items = new DataSet();

    string ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\BookingSys.mdf;Integrated Security=True;User Instance=True";
    string QueryString = "SELECT * FROM [tbl_Guestbook] WHERE Moderated = 1 ORDER BY GuestbookID DESC for XML PATH";

    SqlConnection con = new SqlConnection(ConnectionString);
    SqlDataSource SqlDataSource = new SqlDataSource();

    con.Open();
    using (con)
    {
        SqlCommand cmd = con.CreateCommand();
        cmd.CommandText = "SELECT * FROM [tbl_Guestbook] WHERE Moderated = 1 ORDER BY GuestbookID DESC for XML PATH";
        XmlReader r = cmd.ExecuteXmlReader();
        XmlWriterSettings settings = new XmlWriterSettings();
        settings.Indent = true;
        XmlWriter w = XmlWriter.Create(@"\Temp\gkInfoModerated.xml", settings);
        using (w)
        {
            w.WriteStartElement("root");
            while (!r.EOF)
            {
                w.WriteNode(r, true);
            }
            w.WriteEndElement();
        }
    }

    SqlDataSource.ConnectionString = ConnectionString;
    SqlDataSource.SelectCommand = QueryString;

    Items.ReadXml(MapPath(@"\Temp\gkInfoModerated.xml"));

    // Populate the repeater control with the Items DataSet
    PagedDataSource objPds = new PagedDataSource();
    objPds.DataSource = Items.Tables[0].DefaultView;
    objPds.AllowPaging = true;
    objPds.PageSize = 10;

    objPds.CurrentPageIndex = CurrentPage;

    lblCurrentPage.Text = "Page: " + (CurrentPage + 1).ToString() + " of "
        + objPds.PageCount.ToString();

    // Disable Prev or Next buttons if necessary
    cmdPrev.Enabled = !objPds.IsFirstPage;
    cmdNext.Enabled = !objPds.IsLastPage;

    rptGuestbookView.DataSource = objPds;
    rptGuestbookView.DataBind();
}

Regards

Dan