Question

在Tasky应用程序的核心之后，我创建了业务和数据库层，但是在尝试编译时我得到了这个错误：

Error CS0119: Expression denotes a 'value', where a 'method group' was expected (CS0119) (assales.core)

问题在于没有行编号或文件引用与编译错误通常会发生的错误一致。这让我想到项目选项可能存在问题，但这只是猜测而且有很多选择。我需要做些什么才能找到错误或获取有关此错误的更多信息。

完整构建输出：

Building: assales.core (Debug)
Performing main compilation...
/Library/Frameworks/Mono.framework/Versions/2.10.12/bin/dmcs /noconfig "/out:/Users/sb/assales/assales.core/bin/Debug/assales.core.dll" "/r:/Library/Frameworks/Mono.framework/Versions/2.10.12/lib/mono/4.0/System.dll" "/r:/Library/Frameworks/Mono.framework/Versions/2.10.12/lib/mono/4.0/System.Data.dll" "/r:/Library/Frameworks/Mono.framework/Versions/2.10.12/lib/mono/4.0/Mono.Data.Sqlite.dll" "/r:/Library/Frameworks/Mono.framework/Versions/2.10.12/lib/mono/4.0/System.Data.Linq.dll" "/r:/Library/Frameworks/Mono.framework/Versions/2.10.12/lib/mono/4.0/System.Xml.Linq.dll" "/r:/Library/Frameworks/Mono.framework/Versions/2.10.12/lib/mono/4.0/System.Core.dll" /nologo /warn:4 /debug:full /optimize- /codepage:utf8 "/define:DEBUG"  /t:library "/Users/sb/assales/assales.core/AssemblyInfo.cs" "/Users/sb/assales/assales.core/DL/SqlLite.cs" "/Users/sb/assales/assales.core/DL/AlcSalesDatabase.cs" "/Users/sb/assales/assales.core/BusinessLayer/Contracts/BusinessEntityBase.cs" "/Users/sb/assales/assales.core/BusinessLayer/Contracts/IBusinessEntity.cs" "/Users/sb/assales/assales.core/BusinessLayer/Location.cs" "/Users/sb/assales/assales.core/BusinessLayer/Managers/LocationManager.cs" "/Users/sb/assales/assales.core/DAL/LocationRepository.cs" 
Compilation failed: 1 error(s), 0 warnings

error CS0119: Expression denotes a `value', where a `method group' was expected


Build complete -- 1 error, 0 warnings

---------------------- Done ----------------------

Build: 1 error, 0 warnings

Answer 1

我认为这是单声道编译器的问题。如果我在使用var：

的语句中省略了“new”关键字

// "var" version
public class App {
   public static void Main() {
      //missing keyword "new"
      var bitArray = System.Collections.BitArray(); 
   }
}

编译器不指示行号或文件名：

$ mcs App.cs
error CS0119: Expression denotes a `type', where a `variable', `value' or `method group' was expected

如果我明确声明了bitArray（不使用“var”）：

public class App {
   public static void Main() {
      //missing keyword "new"
      System.Collections.BitArray bitArray = System.Collections.BitArray(); 
   }
}

编译器效果很好：

$ mcs App.cs
App.cs(3,27): error CS0119: Expression denotes a `type', where a `variable', `value' or `method group' was expected
was expected

我的mcs版本是：

$mcs --version
Mono C# compiler version 3.2.3.0

顺便说一句，Microsoft编译器也适用于App.cs的“var version”

/cygdrive/c/WINDOWS/Microsoft.NET/Framework/v4.0.30319/csc.exe App.cs
Microsoft (R) Visual C# 2010 Compiler version 4.0.30319.1
Copyright (C) Microsoft Corporation. All rights reserved.

App.cs(4,23): error CS0119: 'System.Collections.BitArray' is a 'type', which is not valid in the given context

MonoDevelop / MonoTouch - 表达式表示一个“值”，其中一个“方法组”＆＃39;预计 - 无法找到错误信息

1 个答案: