在.net core 3.1项目中使用Sqlite
由于项目需要使用Sqlite, 所以安装了一些Sqlite库。
刚开始用的是 Microsoft.Data.Sqlite.Core 6.0.0 ,但在new SqliteConnection 时抛出异常。
Unhandled exception. System.TypeInitializationException: The type initializer for 'Microsoft.Data.Sqlite.SqliteConnection' threw an exception.
---> System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Data.Sqlite.Utilities.ApplicationDataHelper.GetFolderPath(String propertyName)
at Microsoft.Data.Sqlite.Utilities.ApplicationDataHelper.get_LocalFolderPath()
at Microsoft.Data.Sqlite.Utilities.BundleInitializer.Initialize()
at Microsoft.Data.Sqlite.SqliteConnection..cctor()
不知道怎么解决,google了一下有人说用旧版没问题。于是,换成了上一个版本:5.0.12
//使用 Microsoft.Data.Sqlite.Core 5.0.12,在new 的时候不异常,但open()时异常:
System.Exception: 'You need to call SQLitePCL.raw.SetProvider(). If you are using a bundle package, this is done by calling SQLitePCL.Batteries.Init().'
还缺了个库,再安装 SQLitePCLRaw.bundle_e_sqlite3 就好了,问题解决。
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另外,记得五年前,直接使用C编译的sqlite3.dll, 外加一个C#接口层,只需要两个dll.
现在使用这些包,硬盘就非常遭罪了,随便都超过3个dll!
//microsoft: SqliteConnection
Microsoft.Data.Sqlite.dll
SQLitePCLRaw.batteries_v2.dll
SQLitePCLRaw.core.dll
SQLitePCLRaw.provider.e_sqlite3.dll
runtimes目录
├─alpine-x64
│ └─native
├─linux-arm
│ └─native
├─linux-arm64
│ └─native
├─linux-armel
│ └─native
├─linux-mips64
│ └─native
├─linux-musl-x64
│ └─native
├─linux-s390x
│ └─native
├─linux-x64
│ └─native
├─linux-x86
│ └─native
├─osx-arm64
│ └─native
├─osx-x64
│ └─native
├─win-arm
│ └─native
├─win-arm64
│ └─native
├─win-x64
│ └─native
└─win-x86
└─native
//官方: SQLiteConnection
//官方依赖:
EntityFramework.dll
EntityFramework.SqlServer.dll
Microsoft.Win32.SystemEvents.dll
System.CodeDom.dll
System.Configuration.ConfigurationManager.dll
System.Data.SqlClient.dll
System.Data.SQLite.dll
System.Data.SQLite.EF6.dll
System.Drawing.Common.dll
System.Security.Cryptography.ProtectedData.dll
System.Security.Permissions.dll
System.Windows.Extensions.dll
runtimes目录
├─linux-x64
│ └─native
├─osx-x64
│ └─native
├─unix
│ └─lib
│ ├─netcoreapp2.1
│ └─netcoreapp3.0
├─win
│ └─lib
│ ├─netcoreapp2.1
│ ├─netcoreapp3.0
│ └─netstandard2.0
├─win-arm64
│ └─native
├─win-x64
│ └─native
└─win-x86
└─native