Could not find installable ISAM

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I have tried to use as many connectionstrings as possible but still getting this error ,when working with Excel(.xls) using ADO.NET
Error- "Could not find installable ISAM"

Connection string code used:-

string filename = @"d:\test.xls";
string Connectionstring = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+ filename +";Extended Properties="+"Excel 8.0;HDR=NO;"+"";
OleDbConnection cn = new OleDbConnection(Connectionstring);
cn.Open();//this is the line where am getting error

Posted 24-Sep-13 23:52pm

R K

Updated 25-Sep-13 0:02am

v3

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Alexander Dymshyts 25-Sep-13 5:55am

It means that you cannot establish connection. Check connection string or file existance

R K 25-Sep-13 6:01am

Thanks for responding.
i have the file correctly and not sure whether the connection string is correct ,do am missing something in the connection string?

Alexander Dymshyts 25-Sep-13 6:06am

You can check, if your connection string is right on http://www.connectionstrings.com/excel/
Hope this helped.

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Rick van Woudenberg · Answer 1 · 2013-09-25T00:00:00

Solution 1

You could try :

string cnStr = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Docs\\Book2.xlsx;Extended Properties='Excel 12.0 xml;HDR=YES;'";

you could also try to put single quotes around the datasource :

C#

string co = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + filename + "';Extended Properties="+"Excel 8.0;HDR=NO;"+"";

If the above fails, it could also be a security issue. But we can deal with that if the above fails. Hope this helps.

Posted 25-Sep-13 0:00am

Rick van Woudenberg

Comments

R K 25-Sep-13 6:06am

thanks for the solution
i have tried the second one as am using .xls file ,but still am recieving the same error.
please advise

R K 25-Sep-13 6:09am

I donot have Admin rights on the machine that am working on , is it causing this issue?

Alexander Dymshyts 25-Sep-13 6:11am

It is possible. Try with admin rights.

R K 25-Sep-13 6:47am

i have tried in Admin console too ,no result yet

Alexander Dymshyts 25-Sep-13 8:53am

try to put try-catch on cn.open() and check what error it shows.