Solved

ASP.net - error trying to view an uploaded spreadsheet

Posted on 2011-03-13
3
341 Views
Last Modified: 2012-05-11
JHi. I am getting the following error in the code below on the line marked XXXX
"External table is not in the expected format"
Protected Sub ButtonUpload_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ButtonUpload.Click
        PanelUpload.Visible = True
        PanelView.Visible = False
        PanelImport.Visible = False
    End Sub

    Protected Sub ButtonUploadFile_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ButtonUploadFile.Click
        If FileUploadExcel.HasFile Then
            Try
                ' alter path for your project
                FileUploadExcel.SaveAs(Server.MapPath("~/ExcelImport.xls"))
                LabelUpload.Text = "Upload File Name: " & _
                    FileUploadExcel.PostedFile.FileName & "<br>" & _
                    "Type: " & _
                    FileUploadExcel.PostedFile.ContentType & _
                    " File Size: " & _
                    FileUploadExcel.PostedFile.ContentLength & " kb<br>"
            Catch ex As Exception
                LabelUpload.Text = "Error: " & ex.Message.ToString
            End Try
        Else
            LabelUpload.Text = "Please select a file to upload."
        End If

    End Sub
    Protected Function ExcelConnection() As OleDbCommand

        ' Connect to the Excel Spreadsheet
        Dim xConnStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
              "Data Source=" & Server.MapPath("ExcelImport.xls") & ";" & _
              "Extended Properties=Excel 8.0;"

        ' create your excel connection object using the connection string
        Dim objXConn As New OleDbConnection(xConnStr)
        objXConn.Open() 'XXXX
        ' use a SQL Select command to retrieve the data from the Excel Spreadsheet
        ' the "table name" is the name of the worksheet within the spreadsheet
        ' in this case, the worksheet name is "Members" and is expressed as: [Members$]
        Dim objCommand As New OleDbCommand("SELECT * FROM [Members$]", objXConn)
        Return objCommand

    End Function



    Protected Sub ButtonView_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ButtonView.Click

        'The ButtonView_Click event handler starts by hiding the PanelUpload and PanelImport Panels,
        ' while showing the PanelView interface (which is where the GridView is located). 
        PanelUpload.Visible = False
        PanelView.Visible = True
        PanelImport.Visible = False
        'Next, a new OleDbDataAdapter object is created and its SelectCommand is assigned the OleDbCommand object returned by the ExcelConnection function. 
        ' Create a new Adapter
        Dim objDataAdapter As New OleDbDataAdapter()

        ' retrieve the Select command for the Spreadsheet
        objDataAdapter.SelectCommand = ExcelConnection()
        'The purpose of this OleDbDataAdapter object is to populate a DataSet with the contents of the Excel query; this DataSet is then bound to the GridView.
        ' Create a DataSet
        Dim objDataSet As New DataSet()

        ' Populate the DataSet with the spreadsheet worksheet data
        objDataAdapter.Fill(objDataSet)

        ' Bind the data to the GridView
        GridViewExcel.DataSource = objDataSet.Tables(0).DefaultView
        GridViewExcel.DataBind()
    End Sub

Open in new window

0
Comment
Question by:murbro
  • 2
3 Comments
 
LVL 18

Accepted Solution

by:
Gary Davis earned 500 total points
ID: 35121644
The problem is the connection string or the file (perhaps wrong Excel version).

See these for formats and options that may be included on the connection string:

http://www.connectionstrings.com/excel
http://www.connectionstrings.com/excel-2007

Gary Davis
Webguild
0
 

Author Comment

by:murbro
ID: 35122283
Hi. Could I include code to detect the Excel version. What code would I use for that?
0
 

Author Closing Comment

by:murbro
ID: 35166615
thanks very much
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Gridview selected row 9 50
IIS redirect 1 77
ASP.NET MVC identity 6 30
reading excel file in .net 2 19
Today is the age of broadband.  More and more people are going this route determined to experience the web and it’s multitude of services as quickly and painlessly as possible. Coupled with the move to broadband, people are experiencing the web via …
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project

820 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question