Scaffold-DbContext“方法或操作未实现" [英] Scaffold-DbContext "The method or operation is not implemented"
问题描述
玩得不开心.
PM> 命令运行
Scaffold-DbContext "Server=myserver;Database=mysqlserverdb;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -Tables Settings -verbose
错误:
未实现方法或操作.
System.NotImplementedException:方法或操作未实现.在 Microsoft.EntityFrameworkCore.Scaffolding.ProviderCodeGenerator.GenerateUseProvider(String connectionString)在 Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpDbContextGenerator.GenerateOnConfiguring(字符串连接字符串，布尔抑制连接字符串警告)在 Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpDbContextGenerator.GenerateClass(IModel 模型，字符串上下文名称，字符串连接字符串，布尔值 useDataAnnotations，布尔值抑制连接字符串警告)在 Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpDbContextGenerator.WriteCode(IModel 模型，字符串命名空间，字符串上下文名称，字符串连接字符串，布尔 useDataAnnotations，布尔抑制连接字符串警告)在 Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpModelGenerator.GenerateModel(IModel 模型、字符串命名空间、字符串上下文目录、字符串上下文名称、字符串连接字符串、ModelCodeGenerationOptions 选项)在 Microsoft.EntityFrameworkCore.Design.Internal.DatabaseOperations.ScaffoldContext(String provider, String connectionString, String outputDir, String outputContextDir, String dbContextClassName, IEnumerable1 schemas, IEnumerable1 tables, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean使用数据库名称)在 Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContextImpl(String provider, String connectionString, String outputDir, String outputDbContextDir, String dbContextClassName, IEnumerable1 schemaFilters, IEnumerable1 tableFilters, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)在 Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContext.<>c__DisplayClass0_1.<.ctor>b__0()在 Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_01.b__0()在 Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)`
System.NotImplementedException: The method or operation is not implemented.
at Microsoft.EntityFrameworkCore.Scaffolding.ProviderCodeGenerator.GenerateUseProvider(String connectionString)
at Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpDbContextGenerator.GenerateOnConfiguring(String connectionString, Boolean suppressConnectionStringWarning)
at Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpDbContextGenerator.GenerateClass(IModel model, String contextName, String connectionString, Boolean useDataAnnotations, Boolean suppressConnectionStringWarning)
at Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpDbContextGenerator.WriteCode(IModel model, String namespace, String contextName, String connectionString, Boolean useDataAnnotations, Boolean suppressConnectionStringWarning)
at Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpModelGenerator.GenerateModel(IModel model, String namespace, String contextDir, String contextName, String connectionString, ModelCodeGenerationOptions options)
at Microsoft.EntityFrameworkCore.Design.Internal.DatabaseOperations.ScaffoldContext(String provider, String connectionString, String outputDir, String outputContextDir, String dbContextClassName, IEnumerable1 schemas, IEnumerable1 tables, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContextImpl(String provider, String connectionString, String outputDir, String outputDbContextDir, String dbContextClassName, IEnumerable1 schemaFilters, IEnumerable1 tableFilters, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContext.<>c__DisplayClass0_1.<.ctor>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_01.b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)`
推荐答案
在安装 EF power Tools 和 Latest Core 2.2.xx SDK 之间，我现在能够更改我的项目以使用下拉更改到 .net core 2.2(以前只能执行 2.1.
Between installing the EF power Tools and the Latest Core 2.2.x.x SDK I am now able to change my project to use dropdown change to the .net core 2.2 (it was previously only able to do 2.1.
然后通过 Nuget 更新等，它终于可以工作了！
Then with Nuget updates etc.. , it finally works!
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