unspecified error while upload the excel file

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while uploadiing the excel file ,

System.Data.OleDb.OleDbException: Unspecified errorat System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection) at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup)at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.OleDb.OleDbConnection.Open() at clsOledbClass.opencon()

Posted 29-Apr-13 20:58pm

avinashangel

Updated 29-Apr-13 21:13pm

v3

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VipulAgrawal · Answer 1 · 2013-04-29T21:12:00

Solution 1

Your connectionstring is not correct. Check the connectionstring used to read excel file.

Send the code used to upload execl file.

Posted 29-Apr-13 21:12pm

VipulAgrawal

Comments

avinashangel 30-Apr-13 3:15am

same code is working on last 1 year ,
flupload.PostedFile.SaveAs(targetFileName + StrFileName);
string StrexcelConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + targetFileName + StrFileName + ";Extended Properties='Excel 4.0;HDR=YES;'";
OleDbConnection xlsConn = new OleDbConnection(StrexcelConnectionString);
xlsConn.Open(); // here i got an error

vikas2020 19-Dec-13 2:20am

Hi Avinash, have u got the solution?

VipulAgrawal 30-Apr-13 3:50am

If it is not allowing to open connection.....definetly it is a connectionstring issue.....

vikas2020 19-Dec-13 2:22am

If yes then please share with me, I am also facing the same problem. It works for sometimes and suddenly it starts throwing the exception. In my opinion, it may be because of memory leak. If you have solved the issue then please share with me. Thanks in advance.

avinashangel 30-Apr-13 4:21am

but same code is running from last 1 year ...

Charan_Kumar 4-Mar-14 1:58am

are you closing the connection or not in your code?

Prabhakar Sirna · Answer 2 · 2014-03-03T19:06:00

Hi,

Solution:

This issue can be solved by putting <identity impersonate="false"/> in Configuration file.

Description:

Wehn .net reads an excel file, it creats a temp folder to store the data, and that temp folder can only be access by the ASPNET account. so if you impersonate as another user on the computer / network and tried to use ASPNET to read the data in the excel file, you will not be able to.

Jhone2011 · Answer 3 · 2014-03-03T19:41:00

Solution 3

ur connection string is wrong there is two connection string for xls and xlsx check online,

Posted 3-Mar-14 19:41pm

Jhone2011