c# Dictionary 自定义类型的key 如何判断是否存在
public class DicConfigKey
{
public string ID { get; set; }
public string TypeID { get; set; }
}Dictionary<DicConfigKey, string> dic = new Dictionary<DicConfigKey, string>();
dic.Add(new DicConfigKey { ID = "1", TypeID = "010" }, "test1");
dic.Add(new DicConfigKey { ID = "1", TypeID = "020" }, "test2");
dic.Add(new DicConfigKey { ID = "2", TypeID = "020" }, "test3");
DicConfigKey key = new DicConfigKey() { ID = "2", TypeID = "020" };
//bool flag = dic.Keys.Contains(key);
bool flag = dic.ContainsKey(key);如上代码，Dictionary中自定义类型的键Key，如何判断key是否存在呢，dic.Keys.Contains和dic.ContainsKey都返回false
问题已解决，重写DicConfigKey的Equals和GetHashCode方法即可，代码如下
public class DicConfigKey
{
public string ID { get; set; }
public string TypeID { get; set; }
public override bool Equals(object obj)
{
if (obj == this)
return true;
if (!(obj is DicConfigKey))
return false;
var dicconfikey = (DicConfigKey)obj;
return ID == dicconfikey.ID && TypeID == dicconfikey.TypeID;
}
public override int GetHashCode()
{
return (ID + TypeID).GetHashCode();
}
}
