New Zealand's new Copyright Law presumes 'Guilt Upon Accusation' and will Cut Off Internet Connections without a trial. CreativeFreedom.org.nz is against this unjust law - help us


A Space for All Things .NET Related


Implementing Manual Sorting on GridView

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

Problem:
  • I have GridViews, powered by ObjectDataSources.
  • I wanted to implement sorting
  • Error: DataSource doesn't implement IEnumerable.
  • Went looking it up: too hard
Solution:
  • 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")

  Else

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

  End If

  GridView1.DataBind()

Snippet 3:

  Dim iod As IOrderedDictionary = e.InputParameters  iod(

"SortName") = ViewState("SortName")

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



Other related posts:
Geek Post Monthly Newsletter Volume 2 Issue 6
Exam 70-300 Objective 3
COALESCE T-SQL Function






Add a comment

Please note: comments that are inappropriate or promotional in nature will be deleted. E-mail addresses are not displayed, but you must enter a valid e-mail address to confirm your comments.

Are you a registered Geekzone user? Login to have the fields below automatically filled in for you and to enable links in comments. If you have (or qualify to have) a Geekzone Blog then your comment will be automatically confirmed and shown in this blog post.

Your name:

Your e-mail:

Your webpage:

JamesHip's profile

James Hippolite
Wellington
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".