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Sort Gridview Inside Update Panel

Posted on 2014-01-06
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Last Modified: 2014-01-06
Hi,

I understand sorting a gridview inside an update panel is not compatible (see http://msdn.microsoft.com/en-us/library/bb386454.aspx)

BUT is there a workaround?

Thank you
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Question by:vstack
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3 Comments
 
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Expert Comment

by:5teveo
ID: 39760538
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LVL 16

Accepted Solution

by:
Kamal Khaleefa earned 2000 total points
ID: 39761204
hi
it is very easy to sort a grid view inside updatapanel

here is my code

In ASPX Page
  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"  
                                                                      Width="100%"
                                                                    AllowPaging="true" PageSize="10">
                                                              
                                                                    
                                                                    <Columns>

 <asp:TemplateField  >
                                                                            <HeaderTemplate>
                                                                        
                                                                                            <asp:LinkButton ID="lnkCameraPermitID"  
                                                                                                Text="Pass ID" runat="server" OnClick="Sort"></asp:LinkButton>
                                                                                         
                                                                            </HeaderTemplate>
                                                                            <ItemTemplate>
                                                                                <asp:LinkButton ID="lnk_CameraPermitID"  runat="server"
                                                                                    CommandName="Select" CommandArgument='<%#DataBinder.eval(container,"Dataitem.CameraPermitID") %>'
                                                                                    Text='<%#DataBinder.eval(container,"Dataitem.CameraPermitID") %>'></asp:LinkButton>
                                                                            </ItemTemplate>
                                                                        </asp:TemplateField>

  </Columns>
  </asp:GridView>

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now when you clik on the header sort will happen.
note that i name the header ID like This "lnk"+Data Base Column name
ID="lnkCameraPermitID"  so CameraPermitID is my database cloumn that we will do the sort according to it

now in your code behind do this
 Sub LoadCameraPermits()
   Dim dt As New DataTable

dt=GetAllDataFromDB()
  If Not ViewState("SortColumn") Is Nothing Then
                dv.Sort = (ViewState("SortColumn").ToString() + ViewState("SortDir").ToString()).ToString()
            End If

 GridView1.DataSource = dv
            GridView1.DataBind()
end sub 


 Sub Sort(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim LinkButton1 As LinkButton = CType(sender, LinkButton)
        ViewState("SortColumn") = LinkButton1.ID.Substring(3).ToString
        ChangeSortDir()

        '  If ViewState("Type") Is Nothing Then ViewState("Type") = 1
        LoadCameraPermits()
    End Sub

    Protected Sub ChangeSortDir()
        If ViewState("SortDir") Is Nothing Then
            ViewState("SortDir") = " ASC"
        Else
            If ViewState("SortDir").ToString() = " ASC" Then
                ViewState("SortDir") = " DESC"
            Else
                ViewState("SortDir") = " ASC"
            End If
        End If

    End Sub

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Author Closing Comment

by:vstack
ID: 39761362
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