System.BadImageFormatException on oracle connection string

Asked Apr 15 '21 at 18:03

Active Apr 15 '21 at 20:13

Viewed 29 times

I am getting a System.BadImageFormatException exception when I try to connect to Oracle. This string worked 4 years ago, but now it is not. What am I doing wrong?

string conn = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=hosturl)(PORT=1521))(CONNECT_DATA=(SID=DEV)));User Id=username; Password=password;";

edited Apr 15 '21 at 20:13

tmsbrndz

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asked Apr 15 '21 at 18:03

Charlotte Williams

It's not the connection string that's the problem. `BadImageFormatException` means you have an architecture mismatch (usually 32-bit vs. 64-bit) between your application and the native library used by the Oracle ADO.NET provider. Something in your project changed. Maybe it was running as 32-bit and it got redeployed wrong and is 64-bit now? Assuming, it's a web application, check the AppPool. – madreflection Apr 15 '21 at 18:05
thank you. I will. – Charlotte Williams Apr 15 '21 at 18:07
I think that it was using System.Data.OracleClient that caused the progblem. – Charlotte Williams Apr 15 '21 at 19:01
That was it. Thanks! – Charlotte Williams Apr 15 '21 at 19:15

System.BadImageFormatException on oracle connection string

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