Details View Paging

I am trying to implement paging in my detials view which is bound to a data table created at run time from a .txt file the user uploads

when i run the program and click page 2 this is the error i have gotten

'DetailsView1' fired event PageIndexChanging which wasn't handled

I cant seem to determine how to correctly implement this. From what i am reading I thought I could just bind the Details View to the table, which is what i do in my code-behind since it created at run time

This Should help you out..

Thanks that helped a bit

Another problem Ihave is that, I create the table with the fileupload

Code:

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Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles UpLoadFile_btn.Click
        FileName.InnerHtml = FileUpload1.PostedFile.FileName
        FileContent.InnerHtml = FileUpload1.PostedFile.ContentType
        FileSize.InnerHtml = FileUpload1.PostedFile.ContentLength
        UploadDetails.Visible = True

        Dim strFileName As String = FileUpload1.PostedFile.FileName
        Dim c As String = System.IO.Path.GetFileName(strFileName) ' We don't need the path, just the name.

        Try
            FileUpload1.PostedFile.SaveAs("C:\UploadedUserFiles\" + c)
            Span1.InnerHtml = "File Uploaded Sucessfully."

        Catch Exp As Exception
            Span1.InnerHtml = "Some Error occured."
            UploadDetails.Visible = False
        End Try
        Using myReader As New Microsoft.VisualBasic.FileIO.TextFieldParser(strFileName)
            myReader.SetDelimiters(vbTab)
            Dim currentRow As String()
            currentRow = myReader.ReadFields()
            Dim colNameList As New List(Of String)
            Dim colName As String = String.Empty
            For i As Integer = 0 To currentRow.GetUpperBound(0)
                colName = currentRow(i)
                Dim suffix As Integer = 1
                While colNameList.Contains(colName)
                    colName = currentRow(i) & suffix.ToString
                    suffix += 1
                End While
                colNameList.Add(colName)
            Next
            For Each currentField As String In colNameList
                table.Columns.Add(currentField, GetType(System.String))
            Next
            While Not myReader.EndOfData
                Try
                    currentRow = myReader.ReadFields()
                    table.Rows.Add(currentRow)

                Catch ex As Exception
                End Try
            End While
        End Using
        If Table.Columns.Contains("Column1") Then
            Table.Columns.Remove("Column1")
        End If
        dtAll = table
        Me.DetailsView1.AutoGenerateRows = True
        Me.DetailsView1.DataSource = table
        Me.DetailsView1.DataBind()

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So I think on the pageindexchange i need to re-bind?
I am a bit lost here in ASP land

Quote:

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Originally Posted by billboy

So I think on the pageindexchange i need to re-bind?
I am a bit lost here in ASP land

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yes, In Gridview's PageIndexChanging you need to first set the PageIndex property of gridview to e.NewPageIndex and rebind the gridview with underlying datasource

PS:Make sure the gridview's AllowPaging is set to True

I am using DetailsView, so I need to set the page index to e.newpageindex in the pageindexchanging event and rebind to my datatable?

Can somesome show me where i am going wrong??

Code:

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Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles UpLoadFile_btn.Click
        FileName.InnerHtml = FileUpload1.PostedFile.FileName
        FileContent.InnerHtml = FileUpload1.PostedFile.ContentType
        FileSize.InnerHtml = FileUpload1.PostedFile.ContentLength
        UploadDetails.Visible = True
        Dim strFileName As String = FileUpload1.PostedFile.FileName
        Dim c As String = System.IO.Path.GetFileName(strFileName)
        Try
            FileUpload1.PostedFile.SaveAs("C:\UploadedUserFiles\" + c)
            Span1.InnerHtml = "File Uploaded Sucessfully."
        Catch Exp As Exception
            Span1.InnerHtml = "Some Error occured."
            UploadDetails.Visible = False
        End Try
        CreateTable(FileName.InnerHtml)
        binddetailsviewdata(table)
    End Sub

    Private Sub binddetailsviewdata(ByVal table As DataTable)
        Me.DetailsView1.DataSource = table
        Me.DetailsView1.DataBind()
    End Sub

    Protected Sub DetailsView1_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewPageEventArgs) Handles DetailsView1.PageIndexChanging
        Me.DetailsView1.PageIndex = e.NewPageIndex
        binddetailsviewdata(table)
    End Sub

    Private Function CreateTable(ByVal filepath As String) As DataTable
        Using myReader As New Microsoft.VisualBasic.FileIO.TextFieldParser(FileName.InnerHtml)
            myReader.SetDelimiters(vbTab)
            Dim currentRow As String()
            currentRow = myReader.ReadFields()
            Dim colNameList As New List(Of String)
            Dim colName As String = String.Empty
            For i As Integer = 0 To currentRow.GetUpperBound(0)
                colName = currentRow(i)
                Dim suffix As Integer = 1
                While colNameList.Contains(colName)
                    colName = currentRow(i) & suffix.ToString
                    suffix += 1
                End While
                colNameList.Add(colName)
            Next
            For Each currentField As String In colNameList
                table.Columns.Add(currentField, GetType(System.String))
            Next
            While Not myReader.EndOfData
                Try
                    currentRow = myReader.ReadFields()
                    table.Rows.Add(currentRow)
                Catch ex As Exception
                End Try
            End While
        End Using
        If table.Columns.Contains("Column1") Then
            table.Columns.Remove("Column1")
        End If
        Return table

    End Function

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in below code how do you get the value for table is it being recreated on pageload? if not than you have to recreate object before binding it with DetailsView1?

vb Code:

Protected Sub DetailsView1_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewPageEventArgs) Handles DetailsView1.PageIndexChanging
        Me.DetailsView1.PageIndex = e.NewPageIndex
        binddetailsviewdata(table)
    End Sub

I simplified my code a bit, but its basically the same and still having the same problem.
I thought I needed to recreate the table, however when I do that and page I get error that a column in that table already exisits?? So it seems the table is still there. If I reload my file then my details view displays at the selected page. So it must be where the table is being recreated

Code:

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Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles UpLoadFile_btn.Click
        FileName.InnerHtml = FileUpload1.PostedFile.FileName
        FileContent.InnerHtml = FileUpload1.PostedFile.ContentType
        FileSize.InnerHtml = FileUpload1.PostedFile.ContentLength
        UploadDetails.Visible = True
        Dim strFileName As String = FileUpload1.PostedFile.FileName
        Dim c As String = System.IO.Path.GetFileName(strFileName)
        Try
            FileUpload1.PostedFile.SaveAs("C:\UploadedUserFiles\" + c)
            Span1.InnerHtml = "File Uploaded Sucessfully."
        Catch Exp As Exception
            Span1.InnerHtml = "Some Error occured."
            UploadDetails.Visible = False
        End Try
        BindDetailsView()

    End Sub

    Protected Sub BindDetailsView()
        CreateTable()
        Me.DetailsView1.DataSource = table
        Me.DetailsView1.DataBind()
        TextBox1.Text = table.Rows.Count.ToString
    End Sub

    Protected Sub DetailsView1_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewPageEventArgs) Handles DetailsView1.PageIndexChanging
        Me.DetailsView1.PageIndex = e.NewPageIndex
        BindDetailsView()

    End Sub

    Private Function CreateTable() As DataTable
        Using myReader As New Microsoft.VisualBasic.FileIO.TextFieldParser(FileName.InnerHtml)
            myReader.SetDelimiters(vbTab)
            Dim currentRow As String()
            currentRow = myReader.ReadFields()
            Dim colNameList As New List(Of String)
            Dim colName As String = String.Empty
            For i As Integer = 0 To currentRow.GetUpperBound(0)
                colName = currentRow(i)
                Dim suffix As Integer = 1
                While colNameList.Contains(colName)
                    colName = currentRow(i) & suffix.ToString
                    suffix += 1
                End While
                colNameList.Add(colName)
            Next
            For Each currentField As String In colNameList
                table.Columns.Add(currentField, GetType(System.String))
            Next
            While Not myReader.EndOfData
                Try
                    currentRow = myReader.ReadFields()
                    table.Rows.Add(currentRow)
                Catch ex As Exception
                End Try
            End While
        End Using
        If table.Columns.Contains("Column1") Then
            table.Columns.Remove("Column1")
        End If
        Return table

    End Function

    Protected Sub form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles form1.Load
        Dim UpPath As String
        Dim UpName As String
        UpPath = "C:\UploadedUserFiles2008"
        UpName = Dir(UpPath, vbDirectory)
        If UpName = "" Then
            MkDir("C:\UploadedUserFiles2008\")
        End If

    End Sub

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Hello,

It is not clear from your above code, but where exactly are you storing the table? Or are you actually happy to be recreating it from scratch each time?

On each PostBack to the server, are you actually calling CreateTable()? If so, I am surprised that FileName.InnerHtml actually still contains a value. What sort of control is FileName?

Gary