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问题描述

限时删除!!

我有一个类:

  public class ClientModelData 
{
public int clientID {get;组; }
public IList< int> LocationIDs {get;组; }
}

当我调用它:

  ClientModelData obj = new ClientModelData(); 
obj.LocationIDs.Add(1);

它会引发异常:

 `((System.Collections.Generic.ICollection< int>)(client.LocationID))'is null` 

解决方案

LocationIDs 未初始化,因此它给你的错误。

  public IList< int> LocationIDs {get;组; } 

您应该在构造函数中创建一个实例

  public ClientModelData()
{
LocationIDs = new List< int>();
}


I have a class:

public class ClientModelData
{
    public int clientID { get; set; }
    public IList<int> LocationIDs { get; set; }
}

When I call it:

ClientModelData obj = new ClientModelData();
obj.LocationIDs.Add(1);

It throws an exception:

`((System.Collections.Generic.ICollection<int>)(client.LocationID))' is null`
解决方案

LocationIDs is not initialized therefore it is giving you the error.

public IList<int> LocationIDs { get; set; }

You should create an instance in the constructor

public ClientModelData()
{
  LocationIDs = new List<int>();
}

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1403页,肝出来的..

09-07 19:13