Gridview sorting - No datasource, parameters passed from main page, dynamic sql

Hi All,

 This is not a question but I had to share something I was finally able to figure out and thought it may be helpful to others as well. With the help from Ryan Olshan's website I was able to take what he had and make it work for my needs. The difficulty I had was that I need to dynamically build my SQL statement based on the users selections from the main page. Also because it's Oracle and I don't have access to create stored procedures. Hope this helpful and I signed up because I felt the need to give back to those who helped me via countless Google searches. Note, I commented out the paging code because it is not necessary for my project.




<asp:GridView ID="gvResults" runat="server"

                      EmptyDataText="No data exists for this query."







                      OnSorting = "gvResults_Sorting">


<asp:BoundField HeaderText="Sender" DataField="SENDING_BIC8" SortExpression="SENDING_BIC8">

                    <HeaderStyle Wrap="False" />

                    <ItemStyle Wrap="False" />


<asp:BoundField HeaderText="Receiver" DataField="RECEIVING_BIC8" SortExpression="RECEIVING_BIC8">

                    <HeaderStyle Wrap="False" />

                    <ItemStyle Wrap="False" />






            <RowStyle BorderStyle="Solid" />

            <EmptyDataRowStyle HorizontalAlign="Center" />






Imports System.Data

Imports System.Data.Odbc


Partial Class results

    Inherits System.Web.UI.Page


    Protected Sub form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles form1.Load

        If Not Page.IsPostBack Then

            Dim vd1 = Page.Request.Form("txtVDFrom").ToString()

            If vd1 = "" Then

                Dim dtDate As Date = Today.Date()

                Dim strMonth As String = dtDate.Month.ToString()

                Dim strDay As String = dtDate.Day.ToString()

                Dim strYear As String = dtDate.Year.ToString()


                If Len(strMonth) < 2 Then

                    strMonth = "0" & strMonth

                End If

                If Len(strDay) < 2 Then

                    strDay = "0" & strDay

                End If


                Dim strInDate As String = strMonth & "/" & strDay & "/" & strYear

                vd1 = strInDate

            End If

            Dim vd2 = Page.Request.Form("txtVDTo").ToString()

            Dim amt1 = Page.Request.Form("txtAmt1").ToString()

            Dim amt2 = Page.Request.Form("txtAmt2").ToString()

            Dim rbic = Page.Request.Form("txtRcv").ToString()

            Dim ccy = Page.Request.Form("cmbCCY").ToString()

            Dim mtype = Page.Request.Form("cmbMT").ToString()

            Dim str72 = Page.Request.Form("txt72").ToString()

           'Store fields in Session variables so we don't lose them on sorting

            Session.Add("vd1", vd1)

            Session.Add("vd2", vd2)

            Session.Add("amt1", amt1)

            Session.Add("amt2", amt2)

            Session.Add("rbic", rbic)

            Session.Add("ccy", ccy)

            Session.Add("mtype", mtype)

            Session.Add("str72", str72)

        End If

BindData(Session("vd1"), Session("vd2"), Session("rbic"), Session("ccy"), Session("mtype"), Session("str72"), Session("amt1"), Session("amt2"))


    End Sub


    Sub BindData(ByVal vd1 As String, ByVal vd2 As String, ByVal rbic As String, _

                    ByVal ccy As String, ByVal mtype As String, ByVal str72 As String, _

                        ByVal amt1 As String, ByVal amt2 As String)


        Dim strWhere As String = ""

        Dim strSelect As String = "Select SENDING_BIC8, RECEIVING_BIC8, RECEIVING_BRANCH_CODE,

        NVL(AMT, 0) AMT, UPD_DT, UNID, REPLACE(Fld72, 'NULL', '') Fld72 "

        Dim strFrom As String = "From TABLE_NAME "

        If vd2 <> "" Then

            strWhere = " Where VALUE_DT Between TO_DATE('" & vd1 & " 00:00:00', 'mm/dd/yyyy hh24:mi:ss') And TO_DATE('" & vd2 & " 23:59:59', 'mm/dd/yyyy hh24:mi:ss')"


            strWhere = " Where VALUE_DT Between TO_DATE('" & vd1 & " 00:00:00', 'mm/dd/yyyy hh24:mi:ss') And TO_DATE('" & vd1 & " 23:59:59', 'mm/dd/yyyy hh24:mi:ss')"

        End If

        If rbic <> "" Then

            strWhere = strWhere & " And Fld20 = '" & rbic & "'"

        End If

        If ccy <> "" Then

            strWhere = strWhere & " And CCY = '" & ccy & "'"

        End If

        If mtype <> "" Then

            strWhere = strWhere & " And MESSAGE_TYPE = '" & mtype & "'"

        End If

        If str72 <> "" Then

            strWhere = strWhere & " And Fld72 LIKE ('%" & str72 & "%')"

        End If

        If amt1 <> "" And amt2 = "" Then

            strWhere = strWhere & " And AMT = " & CDbl(amt1)

        End If

        If amt1 <> "" And amt2 <> "" Then

            strWhere = strWhere & " And AMT Between " & CDbl(amt1) & " And " & CDbl(amt2)

        End If

        Dim strOrder As String = "Order By UPD_DT DESC"


        Dim sql As String = strSelect & strFrom & strWhere & strOrder


Dim oCN As New  OdbcConnection(ConfigurationManager.ConnectionStrings("NAME").ConnectionString)



        Dim oDA As New OdbcDataAdapter(sql, oCN)

        Dim oDS As New DataTable




        gvResults.DataSource = oDS






    End Sub












Thank you Ryan.


    Private Property GridViewSortDirection() As String




            Return IIf(ViewState("SortDirection") = Nothing, "ASC", ViewState("SortDirection"))


        End Get


        Set(ByVal value As String)


            ViewState("SortDirection") = value


        End Set


    End Property




    Private Property GridViewSortBLOCKED EXPRESSION As String




            Return IIf(ViewState("SortBLOCKED EXPRESSION = Nothing, String.Empty, ViewState("SortBLOCKED EXPRESSION)


        End Get


        Set(ByVal value As String)


            ViewState("SortBLOCKED EXPRESSION = value


        End Set


    End Property




    Private Function GetSortDirection() As String


        Select Case GridViewSortDirection


            Case "ASC"


                GridViewSortDirection = "DESC"




            Case "DESC"


                GridViewSortDirection = "ASC"


        End Select




        Return GridViewSortDirection


    End Function




    Protected Sub gvresults_PageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs)


        gvResults.DataSource = SortDataTable(gvResults.DataSource, True)


        gvResults.PageIndex = e.NewPageIndex




    End Sub




    Protected Function SortDataTable(ByVal dataTable As DataTable, ByVal isPageIndexChanging As Boolean) As DataView


        If Not dataTable Is Nothing Then


            Dim dataView As New DataView(dataTable)


            If GridViewSortExpression <> String.Empty Then


                If isPageIndexChanging Then


                    dataView.Sort = String.Format("{0} {1}", GridViewSortExpression, GridViewSortDirection)




                    dataView.Sort = String.Format("{0} {1}", GridViewSortExpression, GetSortDirection())


                End If


            End If


            Return dataView




            Return New DataView()


        End If


    End Function




    Protected Sub gvresults_Sorting(ByVal sender As Object, ByVal e As GridViewSortEventArgs)


        GridViewSortExpression = e.SortExpression


        'Dim pageIndex As Integer = gvResults.PageIndex


        gvResults.DataSource = SortDataTable(gvResults.DataSource, False)




        'gvResults.PageIndex = pageIndex


    End Sub


End Class

Thank you and, by all means, if you see something that I could be doing better, please let me know. I am very new to .NET so any advice is always appreciated.

Kind regards,

6/13/2008 7:12:42 PM 72751 articles. 3 followers. Follow

4 Replies

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[PageSpeed] 38


   Exactly what I was looking for! Any possible way to clean up the post to make it more copy friendly?



6/13/2008 7:23:28 PM

I realized as soon as I posted it was garbled. It should look better now.

Thank you,

6/13/2008 7:28:12 PM

Much better thanks ;)


6/13/2008 7:30:12 PM

I forgot to add this code in case you want to hide the post back information from the status bar.

Protected Sub SetWebUICtrlStsBarMsg(ByVal Message As String, ByVal mSrcControl As Control)

Dim SrcControl As WebControls.WebControl = mSrcControl

Dim mMouseDownOver As String = "self.status='" + Message + "';return true;"

Dim mMouseOutUp As String = "self.status='';return true;"

SrcControl.Attributes.Add("onmouseout", mMouseOutUp)

SrcControl.Attributes.Add("onmouseup", mMouseOutUp)

SrcControl.Attributes.Add("onMouseover", mMouseDownOver)

SrcControl.Attributes.Add("onMousedown", mMouseDownOver)

SrcControl.Attributes.Add("onClick", mMouseDownOver)

End Sub

Protected Sub gvResults_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles gvResults.RowDataBound

If e.Row.RowType = DataControlRowType.Header Then

SetWebUICtrlStsBarMsg("Order By Sender", e.Row.Controls(0).Controls(0))

SetWebUICtrlStsBarMsg("Order By Branch", e.Row.Controls(1).Controls(0))

SetWebUICtrlStsBarMsg("Order By Receiver", e.Row.Controls(2).Controls(0))

SetWebUICtrlStsBarMsg("Order By Branch", e.Row.Controls(3).Controls(0))

SetWebUICtrlStsBarMsg("Order By Type", e.Row.Controls(4).Controls(0))

SetWebUICtrlStsBarMsg("Order By Value Date", e.Row.Controls(5).Controls(0))

SetWebUICtrlStsBarMsg("Order By ISO CCY", e.Row.Controls(6).Controls(0))

SetWebUICtrlStsBarMsg("Order By Amount", e.Row.Controls(7).Controls(0))

SetWebUICtrlStsBarMsg("Order By Field 20", e.Row.Controls(8).Controls(0))

SetWebUICtrlStsBarMsg("Order By Field 72", e.Row.Controls(9).Controls(0))

End If

End Sub

6/13/2008 8:13:40 PM

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