Question

我有下面的词典：

Dictionary<string, Value> DictFoundExpected = new Dictionary<string, Value>();

        public struct Value
        {
            string code;
            int found;
            int expected;
            public Value(int f,int exp,string code)
            {
                this.found=f;
                this.expected=exp;
                this.code = code;
            }
        }

脚本：

while (sqlreader.Read())
 {
    if (DictFoundExpected.ContainsKey(sqlreader[1].ToString()))
     {
       DictFoundExpected[sqlreader[1].ToString()]=?????// I want to increase Value.expected by 1
     }
     else
     {
       DictFoundExpected.Add(sqlreader[1].ToString(),new Value(0,0,sqlreader[0].ToString()));

     }
                }

我坚持如何增加Value.expected

的值

Answer 1

我坚持如何增加Value.expected
的值

只需在struct value添加一个方法，即增加Value.expected，如：

public struct Value
{
    string code;
    int found;
    int expected;
    public void IncreaseExpected()
    {
        expected++;
    }
    public Value(int f, int exp, string code)
    {
        this.found = f;
        this.expected = exp;
        this.code = code;
    }
}

并使用它（我稍微更改了代码，只读了sqlreader field一次）：

while (sqlreader.Read())
{
    String currentCode = sqlreader[1].ToString();
    if (DictFoundExpected.ContainsKey(currentCode))
    {
       DictFoundExpected[currentCode].IncreaseExpected();
    }
    else
    {
      DictFoundExpected.Add(currentCode,new Value(0,0,currentCode));

    }
}

Answer 2

while (sqlreader.Read())
{
  string key = sqlreader[1].ToString();
  if (DictFoundExpected.ContainsKey(key))
  {
    Value v = DictFoundExpected[key];
    DictFoundExpected[key]= new Value(v.Found, v.Expected + 1, v.Code);
  }
  else {
    DictFoundExpected.Add(key,new Value(0,0,sqlreader[1].ToString()));
  }
}

这假设您的Value结构具有以下属性：

public int Found { get { return found; } }
public int Expected { get { return expected; } }
public string Code { get { return code; } }

将新值附加到Dictionary

2 个答案: