我正在计数数组中每个元素的出现,但出现错误“Value can not be null”这对我来说没有意义,因为arr1完全填充了除最后5元素是null。计算数组中出现的次数
这是我的代码。我第一次使用字典,所以我可能会在某处出现逻辑错误。我正在阅读文本文件。
string[] arr1 = new string[200];
StreamReader sr = new StreamReader("newWorkSheet.txt");
string Templine1 = "";
int counter = 0;
while (Templine1 != null)
{
Templine1 = sr.ReadLine();
arr1[counter] = Templine1;
counter += 1;
}
sr.Close();
// Dictionary, key is number from the list and the associated value is the number of times the key is found
Dictionary<string, int> occurrences = new Dictionary<string, int>();
// Loop test data
foreach (string value in arr1)
{
if (occurrences.ContainsKey(value)) // Check if we have found this key before
{
// Key exists. Add number of occurrences for this key by one
occurrences[value]++;
}
else
{
// This is a new key so add it. Number 1 indicates that this key has been found one time
occurrences.Add(value, 1);
}
}
// Dump result
System.IO.StreamWriter sr2 = new System.IO.StreamWriter("OrganizedVersion.txt");
foreach (string key in occurrences.Keys)
{
sr2.WriteLine("Integer " + key.ToString() + " was found " + occurrences[key].ToString() + " times");
}
sr2.Close();
Console.ReadLine();
编辑:我把所有的代码放在这里包括声明。
显示'arr1'和'counter'的声明和初始化。 – 2013-05-13 17:50:35