. NET program error: BadImageFormatException .... If you are running in 64-bit mode with 32-bit Oracle client components installed

OracleClient Program to connect Oracle database, the following error is indicated:

The data connection is unsuccessful, check that the database is started when attempting to load an Oracle client when BadImageFormatException is raised. This issue occurs if you run in 64-bit mode with the 32-bit Oracle client component installed.

1.When you deploy IIS

Online search, there are various ways to try to install a 64-bit oracle11g client, or not. Later thought of whether IIS is a problem, before configuring IIS as if encountered a 32-bit 64-bit setting, after looking at the previous blog, the application pool has been set as follows

Set the application pool's advanced settings and default settings to enable the 32-bit application to true, which turns out to be false.

After the setup, there is no such error. Baidu found in the results did not mention this, may have met with the problem I have encountered different.

The exact principle of the error is unclear.

2. at the time of development

The main reason for the same problem is that VS2010 (other non-tested) Debugs are based on x86 (? Version issue? ), installing a 64-bit Oracle client segment may cause problems.

So it is necessary to unify the Oracle version, unified x86 can reduce the development problems, can affect performance? Don't feel it, the execution efficiency of the Code on a small project is the key.