vb.net对象初始化器列表（Of T）已

我一直在寻找一些C＃代码：vb.net对象初始化器列表（Of T）已

List<Employee> Employees = new List<Employee>{ 
    new Employee{firstname="Aamir",lastname="Hasan",age=20}, 
    new Employee{firstname="awais",lastname="Hasan",age=50}, 
    new Employee{firstname="Bill",lastname="Hasan",age=70}, 
    new Employee{firstname="sobia",lastname="khan",age=80}, 
    };

现在，当我将它转换为vb.net

Dim Employees as List(Of Employee) = New List(Of Employee)() With { New Employee() With { _ 
.firstname = "Aamir", _ 
.lastname = "Hasan", _ 
.age = 20 _ 
}, _ 
New Employee() With { _ 
.firstname = "awais", _ 
.lastname = "Hasan", _ 
.age = 50 _ 
}, _ 
New Employee() With { _ 
.firstname = "Bill", _ 
.lastname = "Hasan", _ 
.age = 70 _ 
}, _ 
New Employee() With { _ 
.firstname = "sobia", _ 
.lastname = "khan", _ 
.age = 80 _ 
} _ 
}

我得到的错误“在对象初始值设定项中初始化的字段或属性名称必须以'。'开头。“

现在我可以使用代码员工的数组：

Dim Employees = { New Employee() With { _ 
.FirstName = "Aamir", _ 
.LastName = "Hasan", _ 
.Age = 20}, _ 
New Employee() With { _  
.FirstName = "Awais", _ 
.LastName = "Hasan", _ 
.Age = 50}, _ 
New Employee() With { _ 
.FirstName = "Bill", _ 
.LastName = "Hasan", _ 
.Age = 70 _ 
} _ 
}

但我想一个List(Of Employee)，因为它是缠着我，为什么在vb.net这不工作？

来源

2010-07-15 Tim B James

编辑（2）
正如在评论中指出，VB.NET collection initializers现在已经被引入，并大量以下职位的，应认为是过时的。

编辑
Don't always blindly trust the C# to VB.NET converter
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原来VB.NET doesn't have collection initializers。这意味着不存在

var myList = new List<string>() 
{ 
    "abc", 
    "def" 
};

等价...但它确实有对象初始值。因此，您可以创建一个类的实例并一次性将值分配给其属性，但不能创建列表实例并一次添加项目。

有最接近你可以得到是在上面的链接。您可以创建一个阵列并在一次操作中向其中添加项目，然后您必须为ToList该阵列。

所以这一次，我已经真正编译了自己的代码，它的工作原理。麻烦对不起

Dim EmployeesTemp As Employee() = { _ 
     New Employee() With { _ 
      .firstname = "Aamir", _ 
      .lastname = "Hasan", _ 
      .age = 20 _ 
     }, _ 
     New Employee() With { _ 
      .firstname = "awais", _ 
      .lastname = "Hasan", _ 
      .age = 50 _ 
     }, _ 
     New Employee() With { _ 
      .firstname = "Bill", _ 
      .lastname = "Hasan", _ 
      .age = 70 _ 
     }, _ 
     New Employee() With { _ 
      .firstname = "sobia", _ 
      .lastname = "khan", _ 
      .age = 80 _ 
     } _ 
    } 

    Dim Employees as List(Of Employee) = EmployeesTemp.ToList()

来源

2010-07-15 09:27:24

对不起，这仍然给出了同样的错误。在对象初始值设定项中初始化的字段或属性的名称必须以'。'开头。当我最初转换它时，我使用了那个方便的工具:)总是使用它。 – 2010-07-15 21:04:48

@JimJams：哈！这让我做了一些研究。我会说现在是你加入C＃端的时候了。但是，嘿，看到我更新的答案。 – 2010-07-15 22:11:35

感谢大卫，这是一种享受，是的，现在是我加入C＃的时候了！ – 2010-07-17 15:54:24

收集初始化者为added in VB.NET 2010。这是空码，但这里有：

Dim Employees as List(Of Employee) = New List(Of Employee)() From 
{ 
    New Employee() With { _ 
     .firstname = "Aamir", _ 
     .lastname = "Hasan", _ 
     .age = 20 _ 
    }, _ 
    New Employee() With { _ 
     .firstname = "awais", _ 
     .lastname = "Hasan", _ 
     .age = 50 _ 
    }, _ 
    New Employee() With { _ 
     .firstname = "Bill", _ 
     .lastname = "Hasan", _ 
     .age = 70 _ 
    }, _ 
    New Employee() With { _ 
     .firstname = "sobia", _ 
     .lastname = "khan", _ 
     .age = 80 _ 
    } _ 
}

来源

2011-01-02 02:44:55 MarkJ

VB2010有时也会自动检测行延续，所以可能下划线也是不必要的 – MarkJ 2012-05-04 13:36:58

我以为你总是需要那些？ – Coops 2013-02-01 10:13:56

@codeblend在某些情况下，如果您省略了续行字符，Visual Basic编译器将在下一行代码中隐式继续该语句。 [文档]（http://msdn.microsoft.com/en-us/library/vstudio/ba9sxbw4.aspx） – MarkJ 2013-02-01 14:55:23

这个怎么样？

Dim Employees As List(Of Employee) = { _ 
    New Employee() With { .firstname = "Aamir", .lastname = "Hasan", .age = 20 }, _ 
    New Employee() With { .firstname = "awais", .lastname = "Hasan", .age = 50 }, _ 
    New Employee() With { .firstname = "Bill", .lastname = "Hasan", .age = 70 }, _ 
    New Employee() With { .firstname = "sobia", .lastname = "khan", .age = 80 } _ 
}.ToList()

来源

2017-02-12 00:49:49 Eric

vb.net对象初始化器列表（Of T）已

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