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Help Sorting Dataset

Posted on 2006-04-21
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Last Modified: 2008-02-07
I need some help with this....I am trying to write a function that takes my dataset, and returns a dataset sorted by Name.


Here is What I have so far...

 Public Function SortData(ByRef ds As DataSet) As DataSet
  Dim dv As New DataView
        dv.DataViewManager.DataSet = ds
        dv.Table = ds.Tables(0)
        dv.Sort = "NAME"
        Dim NewDs As DataSet
        NewDs.Tables(0).DefaultView.DataViewManager.DataSet = dv.DataViewManager.DataSet




        Return NewDs
end function

but I get the following error:
Server Error in '/bookstore' Application.
--------------------------------------------------------------------------------

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


Line 349:    Public Function SortData(ByRef ds As DataSet) As DataSet
Line 350:        Dim dv As New DataView
Line 351:        dv.DataViewManager.DataSet = ds
Line 352:        dv.Table = ds.Tables(0)
Line 353:        dv.Sort = "NAME"
 

Source File: c:\inetpub\wwwroot\bookstore\ssl\Management\Controls\n_FeaturedProductAdmin.ascx.vb    Line: 351

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   StoreFront.StoreFront.n_FeaturedProductAdmin.SortData(DataSet& ds) in c:\inetpub\wwwroot\bookstore\ssl\Management\Controls\n_FeaturedProductAdmin.ascx.vb:351
   StoreFront.StoreFront.n_FeaturedProductAdmin.BindData(Int32 val) in c:\inetpub\wwwroot\bookstore\ssl\Management\Controls\n_FeaturedProductAdmin.ascx.vb:318
   StoreFront.StoreFront.n_FeaturedProductAdmin.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\bookstore\ssl\Management\Controls\n_FeaturedProductAdmin.ascx.vb:64
   System.Web.UI.Control.OnLoad(EventArgs e)
   System.Web.UI.Control.LoadRecursive()
   System.Web.UI.Control.LoadRecursive()
   System.Web.UI.Control.LoadRecursive()
   System.Web.UI.Page.ProcessRequestMain()

 
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Question by:peterdidow
1 Comment
 
LVL 35

Accepted Solution

by:
YZlat earned 2000 total points
ID: 16511428
Public Function SortData(ByRef ds As DataSet) As DataSet
  Dim dv As New DataView(ds.Tables(0))
        dv.Sort = "NAME"
        Dim NewDs As DataSet
        NewDs=dv.DataViewManager.DataSet.Copy
      return NewDS
End Function
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