Export Dataset to Excel

I use the following script to export dataset to excel

Public Class DataSetToExcel

  Public Shared Sub Convert(ByVal ds As DataSet, ByVal response As HttpResponse)
    'first let's clean up the response.object
    response.Clear()
    response.Charset = ""
    'set the response mime type for excel
    response.ContentType = "application/vnd.ms-excel"
    'create a string writer
    Dim stringWrite As New System.IO.StringWriter
    'create an htmltextwriter which uses the stringwriter
    Dim htmlWrite As New System.Web.UI.HtmlTextWriter(stringWrite)
    'instantiate a datagrid
    Dim dg As New DataGrid
    'set the datagrid datasource to the dataset passed in
    dg.DataSource = ds.Tables(0)
    'bind the datagrid
    dg.DataBind()
    'tell the datagrid to render itself to our htmltextwriter
    dg.RenderControl(htmlWrite)
    'all that's left is to output the html
    response.Write(stringWrite.ToString)
    response.End()
  End Sub
End Class

It has been working fine except now that I move the script to a new SharePoint server, it stops working.  Instead of exporting the dataset to an excel, it displays the XML on the screen.  Help.  

chaochengaAsked:
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ethothsCommented:
Response.Write writes things to the response stream. That usually means it will be displayed on the screen. However, if the client does not know how to handle the fille type it will try to save it. When you installed Sharepoint you probably set IE to recognise xls files so that they could be displayed. If this is the case then changin the line response.ContentType = "application/vnd.ms-excel" will stop it from happening.
 
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chaochengaAuthor Commented:
What do I need to change the line response.ContentType = "application/vnd.ms-excel" to?
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chaochengaAuthor Commented:
I removed the line response.ContentType = "application/vnd.ms-excel" and it is now showing data on the screen.  However, I need the save as dialog to pop up.  Help.
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chaochengaAuthor Commented:
I got it to work with the following

Response.AppendHeader( "content-disposition",  "attachment; filename=" + name )
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