Custom Paging .Net 2.0 to .Net 3.0

 I have a web app written in VS 2005 that uses griviews with custom paging and sorting done as follows.

 <asp:GridView  ID="GridView1" runat="server" AutoGenerateColumns="False"
DataKeyNames="rec_id" BorderColor="White" BackColor="White" BorderStyle="Ridge" BorderWidth="2px" CellPadding="3" CellSpacing="1" GridLines="None"
AllowPaging="True" AllowSorting="True" PageSize="20" OnSorting="Gvemp_sort" OnPageIndexChanging="gvemp_page"
EmptyDataText="There are no classes listed at this time." CssClass="Grid">
<asp:CommandField SelectText="Sessions" ShowDeleteButton="True" ShowEditButton="True" ShowSelectButton="True" ControlStyle-CssClass="GridA"/>
<asp:BoundField DataField="classtitle" HeaderText="Class Title" SortExpression="classtitle asc" />
<asp:BoundField DataField="classdesc" HeaderText="Description" />
<asp:ButtonField DataTextField="required" SortExpression="required asc" CommandName="empsel" HeaderText="Required" ControlStyle-CssClass="GridA"/>
<asp:BoundField DataField="test" HeaderText="Test" SortExpression="test asc" />
<asp:BoundField DataField="display" HeaderText="Display" SortExpression="display asc"/>
<asp:BoundField DataField="location" HeaderText="Plant" SortExpression="location asc"/>
<asp:BoundField DataField="type" HeaderText="Type" SortExpression="type asc"/>
<asp:BoundField DataField="acnt" HeaderText="Att Cnt" />
<asp:BoundField DataField="ts" HeaderText="Created By" />
<RowStyle CssClass="GridRow" />
<SelectedRowStyle CssClass="GridSelRow" />
<PagerStyle CssClass="GridPager" />
<HeaderStyle CssClass="GridHead" />
<PagerSettings Mode="NumericFirstLast" />
<EmptyDataRowStyle CssClass="GridEmpty" />
Function SortOrder(ByVal Feild As String) As String
Feild = ViewState("SortOrder").ToString() Then
SortOrder = Replace(Feild, "asc", "desc")
SortOrder = Replace(Feild, "desc", "asc")
End If
End Function

Gvemp_page(ByVal sender As Object, ByVal e As GridViewPageEventArgs)
GridView1.PageIndex = e.NewPageIndex
End Sub

Gvemp_sort(ByVal sender As Object, ByVal e As GridViewSortEventArgs)
GridView1.PageIndex = 0
End Sub
Sub GetDataReader(ByVal ColumnOrder As String)
'Assign ColumnOrder to viewstate
ViewState("SortOrder") = ColumnOrder

Dim fe As Encryption64 = New Encryption64
Dim strConn As String = fe.DecryptFromBase64String(AppSettings("ConnString"), "*******")
Dim conn1 As New SqlClient.SqlConnection(strConn)

Dim cmdLoadData As New SqlClient.SqlCommand("********", conn1)
cmdLoadData.CommandType = CommandType.StoredProcedure

With cmdLoadData
.Parameters.Add(New SqlClient.SqlParameter("@sb", SqlDbType.VarChar = 20))
.Parameters("@sb").Value = Trim(ColumnOrder)
End With

'Creat datatable
Dim DataReaderTable As New DataTable
Dim dc0 As New DataColumn("Rec_id", GetType(Object))
Dim dc1 As New DataColumn("Classtitle", GetType(String))
Dim dc2 As New DataColumn("ClassDesc", GetType(String))
Dim dc3 As New DataColumn("Required", GetType(String))
Dim dc4 As New DataColumn("TS", GetType(String))
Dim dc5 As New DataColumn("Display", GetType(String))
Dim dc6 As New DataColumn("Type", GetType(String))
Dim dc7 As New DataColumn("Location", GetType(String))
Dim dc8 As New DataColumn("Test", GetType(String))
Dim dc9 As New DataColumn("ACnt", GetType(String))
With DataReaderTable
End With

Dim datareader As SqlClient.SqlDataReader
datareader = cmdLoadData.ExecuteReader
While datareader.Read
Dim dr As DataRow = DataReaderTable.NewRow
With dr
dr(0) = datareader(0)
dr(1) = datareader(1)
dr(2) = datareader(2)
dr(3) = datareader(3)
dr(4) = datareader(4)
dr(5) = datareader(5)
dr(6) = datareader(6)
dr(7) = datareader(7)
dr(8) = datareader(8)
dr(9) = datareader(9)
End With
End While
'Close datareader
'Close connection
Dim source As DataView = DataReaderTable.DefaultView
source.Sort = ColumnOrder
'Bind datagrid from arraylist
GridView1.DataSource = source
        Catch ex As Exception
lblError.Text = "GetDataReader " & ex.ToString
End Try
End Sub
 This works perfectly in VS 05. I do the same thing in VS 08 but it does not work. No errors but it just doesn't function. Any ideas as to any differences between VS 05 and VS 08?
6/26/2008 10:44:04 PM 72751 articles. 3 followers. Follow

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 Any ideas as to why this would work in .net 2.0 and not work in .net 3.0?

6/30/2008 7:15:56 PM

Hi melvincureton,

Try to use breakpoint to find the problem. Here is another sample for sorting and paging in GridView:

protected void Page_Load(object sender, EventArgs e)
        if (!IsPostBack)
            GridView1.DataSource = GetStudent("select * from student").Tables[0];

    public DataSet GetStudent(string query)
        SqlConnection conn = new SqlConnection(@"Server=(local)\SQLEXPRESS;Integrated Security=SSPI;Database=test;Persist Security Info=True");
        SqlCommand cmd = new SqlCommand(query, conn);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        return ds;

    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
           GridView1.DataSource = SortDataTable(GetStudent("select * from student").Tables[0] as DataTable, true);
           GridView1.PageIndex = e.NewPageIndex;
     private string GridViewSortDirection
           get { return ViewState["SortDirection"] as string ?? "ASC"; }
           set { ViewState["SortDirection"] = value; }

      private string GridViewSortExpression
          get { return ViewState["SortExpression"] as string ?? string.Empty; }
          set { ViewState["SortExpression"] = value; }
      private string GetSortDirection()
          switch (GridViewSortDirection)
              case "ASC":
                  GridViewSortDirection = "DESC";
              case "DESC":
                  GridViewSortDirection = "ASC";
          return GridViewSortDirection;
      protected DataView SortDataTable(DataTable dataTable, bool isPageIndexChanging)
          if (dataTable != null)
              DataView dataView = new DataView(dataTable);
              if (GridViewSortExpression != string.Empty)
                  if (isPageIndexChanging)
                      dataView.Sort = string.Format("{0} {1}", GridViewSortExpression, GridViewSortDirection);
                      dataView.Sort = string.Format("{0} {1}", GridViewSortExpression, GetSortDirection());
              return dataView;
              return new DataView();
      protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
          GridViewSortExpression = e.SortExpression;
          int pageIndex = GridView1.PageIndex;
          GridView1.DataSource = SortDataTable(GetStudent("select * from student").Tables[0] as DataTable, false);
          GridView1.PageIndex = pageIndex;

    protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
        DetailsView1.DataSource = GetStudent("select * from student where ID=" + GridView1.DataKeys[e.NewSelectedIndex].Value).Tables[0];


Qin Dian Tang
Microsoft Online Community Support

Please remember to mark the replies as answers if they help and unmark them if they provide no help.
7/1/2008 9:29:35 AM

 Hope this will guide you for the Paging in the GridView..

Paging in GridView 

"A conclusion is where you got tired of thinking.
Be different. Think "

Remember to click “Mark as Answer” on the post If you get answer from my post(s) !

Thanks Guys
7/1/2008 9:36:07 AM

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