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Implementing Manual Sorting on GridView

By James Hippolite, in , posted: 21-May-2008 12:17

  • I have GridViews, powered by ObjectDataSources.
  • I wanted to implement sorting
  • Error: DataSource doesn't implement IEnumerable.
  • Went looking it up: too hard
  • GetData() method accepts two input parameters: SortName and SortOrder
  • Page.Load method (snippet 1)
  • GridView.Sorting method (snippet 2)
  • ObjectDataSource.Selecting method (snippet 3)
Snippet 1:

  If IsPostBack Then

    Exit Sub

  End If

  ViewState("SortName") = "ColumnName"

  ViewState("SortOrder") = WebControls.SortDirection.Ascending

Snippet 2:
  e.Cancel = True 'Cancel the automatic sort, do it manually

  If ViewState("SortName") = e.SortExpression Then

     ViewState("SortOrder") = Not ViewState("SortOrder")


     ViewState("SortName") = e.SortExpression      ViewState("SortOrder") = e.SortDirection

  End If


Snippet 3:

  Dim iod As IOrderedDictionary = e.InputParameters  iod(

"SortName") = ViewState("SortName")

  iod("SortOrder") = ViewState("SortOrder")

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James Hippolite
New Zealand

Welcome to my technical blog. 

Here, I attempt to distill the Microsoft Certified Professional Developer knowledge I have accumulated since first qualifying MCP in 1996.  This blog started on 13 September 2007 as an off-shoot from my mixed up personal blog.  But it took a shot in the arm from Scott Hanselman's talk at TechEd New Zealand 08 "32 Ways To Make Your Blog Suck Less".