找不到可安装的 ISAM

Question

I have the following code:

string excelConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C:\db\suc.xls; Extended Properties=""Excel 12.0;HDR=YES;""";

// Create Connection to Excel Workbook
using (OleDbConnection connection =
             new OleDbConnection(excelConnectionString))
{
    OleDbCommand command = new OleDbCommand
            ("Select * FROM [Sheet1$]", connection);

    connection.Open();

and i get the following error:

Could not find installable ISAM.

at connection.Open() . Any ideas?

Answer 1

I had the same error, but none of the suggestions above worked. In my case all I had to do was to change my connection string to this:

string connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FilePath + ";Extended Properties='Excel 12.0;IMEX=1;'";

Note the Single Quote around the Extended Properties attribute ('Excel 12.0;IMEX=1;'). Once I added those single quotes the error disappeared!

Answer 2

There's no 64 bit version of the Jet OLEDB drivers, so if you are running this on a 64 bit OS you might need to target x86 in your .NET application and not Any CPU :

Answer 3

I was getting this issue trying to opening an xls file with a more recent provider. I fixed this issue by changing my extended properties from

Extended Properties="Excel 11.0;"

to

Extended Properties="Excel 8.0;"

I guess Excel 11 expects an xlsx style file.

Answer 4

On 64-bit Windows and 64-bit Office (2010, 2013) environments, there are many reports on this error. The fix or workaround is a bit strange but seems to work for most people out there.

The " Microsoft Access Database Engine 2010 Redistributable " installation package seems the natural one to use but several reports says it does not work.

Instead, using the " 2007 Office System Driver: Data Connectivity Components " seems to solve the above problem for most people.

Answer 5

use Extended properties="\excel 8.0;

Answer 6

I had the same kind of problem. I was using an Excel 2010 database. But I had a xlsx file instead of xls. I solved my problem using the connection string as fallows,

Provider=Microsoft.ACE.OLEDB.12.0;Data Source=logbook.xlsx;Extended Properties='Excel 12.0;HDR=YES;IMEX=1;';

What I was missing are, I used OLEDB.4.0 instead of ACE.12.0. I tried using ACE.14.0. But it didn't work either. Then I missed inverted commas ( ' ' ) around Extended Properties.

Sorry if the answer is hard to read, I am uploading this in my phone.

Answer 7

// SET A CONNECTION WITH THE EXCEL FILE.

              OleDbConnection myExcelConn = new OleDbConnection
                  ("Provider=Microsoft.ACE.OLEDB.12.0; " +
                      "Data Source=" + Server.MapPath(".") + "\\" + fileUpload1.FileName +
                      ";Extended Properties='Excel 12.0;HDR=YES'");

Putting Single quote in Extended Properties like Extended Properties ='Excel 12.0:HDR=YES' solved my problem.