为什么要安装Microsoft Visual C ++ 2010 Redistributable Package x86来使用SQLite？

Question

I wrote windows application with C# and SQLite. When Microsoft Visual C++ 2010 Redistributable Package x86 was installed on a PC application runs correctly but if Microsoft Visual C++ 2010 Redistributable Package x86 not install, application doesn't run. Why?
Is SQLite depend on Microsoft Visual C++ 2010 Redistributable Package x86 ?

Answer 1

SQLite的版本由VS2010编译，并且取决于C运行时库，因此需要Visual C ++ 2010可再发行组件包x86。

Answer 2

Yes. SQLite is probably written in C++. It's compiled with /MD option which means it needs the msvcrt#.dlls at runtime. The Restributable Package installs this without which it cannot run

Answer 3

Because SQLite obviously developed the SQLite.Interop.dll in C++, and because they say so:

Either the named dynamic link library (DLL) cannot be located or it cannot be loaded due to missing dependencies. Make sure the named dynamic link library is located in the application directory or a directory along the system PATH and try again.

Emphasis mine on that last part. You need the static binaries from the system.data.sqlite download page in order to NOT need the C++ runtime. On that same page, where the binaries are provided, those that do require it will tell you it is - for example, the Visual C++ 2010 SP1 runtime for x64 is required for 4.0, and Update 4 of that is needed for .NET 4.5, according to the page. I've used the 2015 version, Update 3, with the .NET 4.0 versions with no issues.

Note - you might not be aware, but if you try hosting an application that uses the SQLite DLLs on a file share and connect to that application across the network from a workstation, that workstation will still need the C++ runtime because it is running the application in its memory.

Reference: http://system.data.sqlite.org/index.html/doc/trunk/www/faq.wiki#q11

Link to Microsoft Visual C++ 2015 Redistributable Update 3 , which I know works with the 64-bit, .NET 4.0 versions of the SQLite binaries: https://www.microsoft.com/en-us/download/details.aspx?id=53840

Answer 4

SQLite depends on the Visual C++ runtime, but you don't need to install it on the client machine. The system.data.sqlite download page contains several "static" packages that already contain the runtime.

All the "static" packages contain either native or mixed-mode assembly binaries linked statically to the appropriate version of the Visual C++ runtime. Typically, these packages are used in cases where customer machines may not have the necessary version of the Visual C++ runtime installed and it cannot be installed due to limited privileges.

For example, on my machine I am running Windows 8.1 x64 so I went under Precompiled Statically-Linked Binaries for 64-bit Windows (.NET Framework 4.0) and downloaded sqlite-netFx40-static-binary-x64-2010-1.0.90.0.zip .

This binary package contains all the binaries for the x64 version of the System.Data.SQLite 1.0.90.0 (3.8.2) package. The Visual C++ 2010 SP1 runtime for x64 is statically linked. The .NET Framework 4.0 is required.

I then unzipped the package and ran test.exe to make sure everything works. Zero installation required.