System.Data.OleDb.OleDbException: Could not find installable ISAM

Question

I have scoured the net, and found many people asking this, yet none have fixed my answer.

I have a Connection Class, and a Method that uses that Class in a page.

Answer 1

If you use more than 1 extended property then the value tokens must be quoted, otherwise there is no way for the driver to distinguish them from the other non-extended properties in the connection string;

...Extended Properties=""Excel 8.0;IMEX=1"""

modify your connection string

String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=pricelist.xlsx;Extended Properties=""Excel 12.0 Xml;HDR=YES""");

reference: Could not find installable ISAM

Answer 2

please "Extended Properties" put it in ' '.

That is, like the following statement:

string connStr = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=pricelist.xlsx;Extended Properties='Excel 12.0 Xml;HDR=YES'")

Answer 3

If you had installed LibreOffice look for cli_basetypes.dll, cli_cppuhelper.dll, cli_oootypes.dll, cli_uno.dll, cli_ure.dll, cli_uretypes.dll then add references to your project (to work with LibreOffice API's), I also installed "Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint File Formats" and "Microsoft Access Database Engine 2010 Redistributable" (to get ACE.OLEDB.12.O connection without complete Office installation). This is a part of VB Sample in which I got the connection to oledb to create some queries.

    OpenFileDialog.Filter = "Spreadsheets (*.xls*)|*.xls*"
    OpenFileDialog.Multiselect = False
    Try
        If (OpenFileDialog.ShowDialog() = System.Windows.Forms.DialogResult.OK) Then
            objOffice = CreateObject("com.sun.star.ServiceManager") 'preparar instancia libreOffice (prepare libreOffice instance)
            instOffice = objOffice.createInstance("com.sun.star.frame.Desktop")
            Dim obj(-1) As Object
            Dim myDoc = instOffice.loadComponentFromURL("file:///" & OpenFileDialog.FileName.Replace("\", "/"), "_default", 0, obj)
            Dim hojas = myDoc.getSheets().getElementNames() 'Obtener nombres de las hojas de calculo (get Spreadsheet names)
            System.Threading.Thread.Sleep(1000) 'Esperar a que termine la instancia Office (await libreOffice thread)
            myDoc.Close(True)

            Dim MyConnection As System.Data.OleDb.OleDbConnection 'Preparar conexión para realizar consulta tipo sql (preparing connection)
            Dim DtSet As System.Data.DataSet
            Dim MyCommand As System.Data.OleDb.OleDbDataAdapter

            If OpenFileDialog.FileName.ToUpper.Contains(".XLSX") Then
                MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.ACE.OLEDB.12.0;Data Source='" & OpenFileDialog.FileName & "';Extended Properties='Excel 12.0 Xml;HDR=YES;IMEX=1;'")
            Else
                MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.ACE.OLEDB.12.0;Data Source='" & OpenFileDialog.FileName & "';Extended Properties='Excel 12.0;HDR=YES;IMEX=1'")
            End If