var context = ((IInfrastructure<IServiceProvider>)set).GetService<DbContext>(); 在EF Core 1.0 中会出现如下错误 Unhandled Exception: System.InvalidOperationException: No database provider has been configured for this DbContext. A provider can be configu…
原文链接 This database provider allows Entity Framework Core to be used with SQLite. The provider is maintained as part of the Entity Framework Core project. Supported Database Engines SQLite (3.7 onwards) Supported Platforms .NET Framework (4.5.1 onward…
现在有一个api, 提供图片的下载,如下代码,,调试出现 InvalidOperationException: No file provider has been configured to process the supplied file. 的错误. var rootPath = _hostingEnvironment.ContentRootPath; var photoName= "photo.jpeg"; bitmap.Save($@"{rootPath}\{phot…
原文链接 This can be useful for testing, although the SQLite provider in in-memory mode may be a more appropriate test replacement for relational databases. Supported Database Engines Built-in in-memory database (designed for testing purposes only) Suppo…
之前学习EFCore的时候,都是在VS创建的默认模板里面进行的,按照官方文档,直接就可以搞定. 今天新项目准备上.Net Core,打算先按照国际惯例,进行分层,数据访问层是用EFCore来做,于是就单独把这层放到一个类库里面 1.添加引用 第二个和第三个库是必须要添加的,如果你不用命令迁移除外..... 2.打开程序包管理控制台 Add-Migration intidb 然后就会发现报错了 No database provider has been configured for this Db…
原文:https://codesmith.atlassian.net/wiki/display/Generator/Configuring+and+troubleshooting+a+Schema+Provider The sections below will help guide you through using and configuring various Schema Providers that ship with CodeSmith Generator. Creating a n…
今天遇到了一个关于LINKED SERVER查询报错的案例,链接服务器链接ORACLE数据库,测试没有错误,但是执行脚本的时候,报如下错误: Msg 7399, Level 16, State 1, Line 1 The OLE DB provider "OraOLEDB.Oracle" for linked server "xxxx" reported an error. Access denied. Msg 7301, Level 16, State 2,…
