2

我的 DevExpress xtragrid 中的一列不是排序、分组或过滤。对类似问题的回答表明我需要实现 IComparable，但是当我这样做时，它根本不再显示在列中。

public class Flow : System.IComparable<Flow>
{
  public Flow(int id, string name, string description)
  {
    this.ID = id;
    this.Name = name;
    this.Description = description;
  }

  public int ID { get; private set; }

  public string Name { get; private set; }

  public string Description { get; private set; }

  public override string ToString()
  {
    return Name;
  }

  public override bool Equals(object obj)
  {
    Flow flow = obj as Flow;
    if (flow == null) return false;
    return this.ID == flow.ID;
  }

  public static bool operator ==(Flow flow1, Flow flow2)
  {
    if (object.ReferenceEquals(null, flow1))
      return object.ReferenceEquals(null, flow2);
    return flow1.Equals(flow2);
  }

  public static bool operator !=(Flow flow1, Flow flow2)
  {
    return !(flow1 == flow2);
  }

  public override int GetHashCode()
  {
    return ID;
  }

  public int CompareTo(Flow other)
  {
    return this.Name.CompareTo(other.Name);
  }
}

我做错了什么？

更新：

在DevExpress上询问...

4

2 回答 2

2

消失的内容是一个不相关的问题 - 一个红鲱鱼。一旦我实施，该列就允许排序，IComparable而不是IComparable<Flow>

public int CompareTo(object obj)
{
  if (object.ReferenceEquals(null, obj))
    return 1;
  Flow flow = obj as Flow;
  if (flow == null)
    throw new ArgumentException("Object is not of type Flow");
  return this.Name.CompareTo(flow.Name);
}

来自Method的 MSDN 文档IComparable.CompareTo

于 2013-01-25T09:21:52.847 回答
0

看起来您的 CompareTo 方法是错误的。尝试将以下内容添加到 CompareTo() 方法中，看看它是否有效：

    public int CompareTo(Flow other)
    {
      // Alphabetic sort if name is equal.
      if this.Name == other.Name
      {
        return this.Name.CompareTo(other.Name);
      }
     //Default sort.
     return other.Name.CompareTo(this.Name);
    }

让我知道它是否解决了您的问题。

于 2013-01-25T08:32:54.380 回答