EF Core 5.0.5 Add-Migration 字符串参数“名称”不能为空

Question

I am having an issue in regards with Add-Migration and gave me an error The string argument 'name' cannot be empty. . I tried executing this command like this: Add-Migration Update_Add_User .

Here is the error:

Build started... Build succeeded. System.ArgumentException: The string argument 'name' cannot be empty. at Microsoft.EntityFrameworkCore.Utilities.Check.NotEmpty(String value, String parameterName) at Microsoft.EntityFrameworkCore.Design.Internal.CSharpHelper.Identifier(String name, ICollection 1 scope) at Microsoft.EntityFrameworkCore.Migrations.Design.CSharpMigrationOperationGenerator.Generate(CreateTableOperation operation, IndentedStringBuilder builder) at Microsoft.EntityFrameworkCore.Migrations.Design.CSharpMigrationOperationGenerator.Generate(String builderName, IReadOnlyList 1 operations, IndentedStringBuilder builder) at Microsoft.EntityFrameworkCore.Migrations.Design.CSharpMigrationsGenerator.GenerateMigration(String migrationNamespace, String migrationName, IReadOnlyList 1 upOperations, IReadOnlyList 1 downOperations) at Microsoft.EntityFrameworkCore.Migrations.Design.MigrationsScaffolder.ScaffoldMigration(String migrationName, String rootNamespace, String subNamespace, String language) at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigration(String n ame, String outputDir, String contextType, String namespace) at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImpl(String name, String outputDir, String contextType, String namespace) at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigration.<>c__DisplayClass0_0.<.ctor>b__0() at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0`1.b__0() at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action) The string argument 'name' cannot be empty.

can anyone tell me how to fix this?

Update: Nuget Packages

Microsoft.EntityFrameworkCore 5.0.5 Microsoft.EntityFrameworkCore.SqlServer 5.0.5 Microsoft.EntityFrameworkCore.Design 5.0.5

Answer 1

Make sure you add the nuget package Microsoft.EntityFrameworkCore.Tools else you won't be able to run EF commands on the Package Manager Console.

Install-Package Microsoft.EntityFrameworkCore.Tools -Version 5.0.5

Do you get the same error if you used dotnet ef add-migration nameOfMigration ?