字典值的总和 [英] Sum of dictionary value

问题描述

字典<字符串， int  [，] > 矩阵=  new 字典<字符串， int  [，] 
  //  获取数组中字典的值 
  public  < span class =code-keyword> object  [] Tab_Mat（Dictionary< string， int  [，]  >  a）
 {
  object  [] ruleArray =  new   object  [a.Count]; 
  int  num =  0 ; 
  foreach （KeyValuePair< string， int  [，] > 规则 in  a）
 ruleArray [num ++] = rule.Value; 
  return  ruleArray; 
} 
  //  获取字典值的总和 
  public   int  [，] sum_global_Mat（Dictionary< string， int  [，] >  config）
 {
  var  a = Tab_Mat（config）; 
  var  newArray = Array.ConvertAll（a，item = > （ INT  [，]）项）; 
  int  [，] m =  new   int  [newArray [ 0 ]。GetLength（ 0 ），newArray [ 0 ]。GetLength（ 1 ）]; 
  for （ int  i =  0 ; i< a.Length; i ++）
 {
  for （ int  h =  0 ; h <  m.GetLength（ 0 ）; h ++）
  for （ int  j =  0 ; j <  m.GetLength（ 1 ）; j ++）
 
m [h，j] =（ int ）a [i] +（ int ）a [i + 1]; 
} 
  return  m; 
} 

>（）;



我的尝试：



Hello evry one我是C＃中的一个重要人物，

我试着做一本字典值的总和，知道这个值是Matrix，但它给我以下错误：



'System.InvalidCastException'

解决方案

< blockquote>

Quote：

'System.InvalidCastException'

帮助了一下，但知道哪一行会让我们的工作更轻松......



猜测，就是这一行：

 m [h，j] =（int）a [i] +（int）a [i +1]; 
 

，这意味着 a 不包含整数。首先看看Tab_Mat究竟返回了什么，然后使用调试器找出 a [i] 和中的确切内容a [i + 1] 问题发生时。

我们不能为您执行此操作：我们在运行代码时无法访问您的代码！

 Dictionary<string, int[,]> Matrices = new Dictionary<string, int[,]
//Get the values of dictionary in an array
 public object[] Tab_Mat(Dictionary<string, int[,]> a)
        {
            object[] ruleArray = new object[a.Count];
            int num = 0;
            foreach (KeyValuePair<string, int[,]> rule in a)
                ruleArray[num++] = rule.Value;
            return ruleArray;
        }
//Get the sum of the values of the dictionary
public int[,] sum_global_Mat(Dictionary<string, int[,]> config)
        {
            var a = Tab_Mat(config);
            var newArray = Array.ConvertAll(a, item => (int[,])item);
            int[,] m = new int[newArray[0].GetLength(0), newArray[0].GetLength(1)];
            for ( int i=0;i<a.Length;i++)
            {
                for (int h = 0; h < m.GetLength(0); h++)
                    for (int j = 0; j < m.GetLength(1); j++)
                        
                        m[h,j] =(int)a[i]+(int)a[i+1] ;
            }
            return m;
        }

>();

What I have tried:

Hello evry one i am a biginner in C#,
I tried to do the sum of values of a dictionary ,knowing that this values are Matrix,but it give me the following error :

'System.InvalidCastException'

解决方案

Quote:

'System.InvalidCastException'

Helps a bit, but knowing which line would make our job easier...

At a guess, it's this line:

m[h,j] =(int)a[i]+(int)a[i+1] ;

and it implies that a does not contain integers. So start by looking at what exactly Tab_Mat does return, then use the debugger to find out exactly what is in a[i] and a[i + 1] when the problem occurs.
We can't do that for you: we don't have any access to your code while it's running!

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