有時候由于某些要求會對Dictionary排序，一般有兩種方法。
1、使用SortedDictionary。
這種自動會對儲存的值進行排序。
static void Main(string[] args)
{
SortedDictionary<int,
object> testDictioary = new SortedDictionary<int,
object>();
int flag = 0;
do
{
Random random = new Random();
int temp = random.Next(100);
if (!testDictioary.ContainsKey(temp))
{
testDictioary.Add(temp, null);
}
flag = testDictioary.Count;
} while (flag < 20);
Console.WriteLine("未排序前:");
foreach (int key
in testDictioary.Keys)
Console.Write(string.Format(@"{0} ", key));
}
結果：
2、自己寫的方法。如下
public static
void Sort(Dictionary<int,
object> dictionary)
{
try
List<int> sortList =
new List<int>();
Dictionary<int,
object> tempDictionary = new Dictionary<int,
foreach (int key
in dictionary.Keys)
sortList.Add(key);
tempDictionary.Add(key, dictionary[key]);
int flag = 1;
int i, j;
int itemCount = sortList.Count;
int itemTemp;
for (i = 1; i < itemCount && flag == 1; i++)
flag = 0;
for (j = 0; j < itemCount - i; j++)
{
int countfore = sortList[j];
int countback = sortList[j + 1];
if (countfore > countback)
{
flag = 1;
itemTemp = sortList[j];
sortList[j] = sortList[j + 1];
sortList[j + 1] = itemTemp;
}
}
dictionary.Clear();
for (int n = 0; n < itemCount; n++)
foreach (int tempKey
in tempDictionary.Keys)
int value = sortList[n];
if (tempKey.Equals(value))
if (!dictionary.ContainsKey(tempKey))
{
dictionary.Add(tempKey, tempDictionary[tempKey]);
}
catch { }
}
調用結果如下：
{
Console.WriteLine("key為數字");
Dictionary<int,
object> testDictioary = new Dictionary<int,
int flag = 0;
do
{
Random random = new Random();
int temp = random.Next(100);
if (!testDictioary.ContainsKey(temp))
{
testDictioary.Add(temp,
null);
}
flag = testDictioary.Count;
} while (flag < 20);
Console.WriteLine("未排序前:");
foreach (int key
Console.Write(string.Format(@"{0} ", key));
}
Console.WriteLine();
CustomMethod.Sort(testDictioary);
Console.WriteLine("排序後:");
Console.ReadLine();
}
那麼這種方法是否是多此一舉呢，因為SortedDictionary完全可以滿足排序了。但是有時key會是這樣的，100+“ssdd”，或100+20，是字元串類型。這樣就能用到上面的方法了。比如以key為100+20這種類型為例。改動一下Sort方法。
void Sort(Dictionary<string,
try
List<int> sortList =
Dictionary<string,
object> tempDictionary = new Dictionary<string,
foreach (string key
int intKey = Convert.ToInt32(key.Substring(0, key.IndexOf("+")));
sortList.Add(intKey);
tempDictionary.Add(key, dictionary[key]);
int flag = 1;
int i, j;
int itemCount = sortList.Count;
int itemTemp;
for (i = 1; i < itemCount && flag == 1; i++)
flag = 0;
for (j = 0; j < itemCount - i; j++)
{
int countfore = sortList[j];
int countback = sortList[j + 1];
if (countfore > countback)
{
flag = 1;
itemTemp = sortList[j];
sortList[j] = sortList[j + 1];
sortList[j + 1] = itemTemp;
}
}
dictionary.Clear();
for (int n = 0; n < itemCount; n++)
foreach (string tempKey
string value = sortList[n].ToString();
if (tempKey.StartsWith(string.Format(@"{0}+", value)))
if (!dictionary.ContainsKey(tempKey))
{
dictionary.Add(tempKey, tempDictionary[tempKey]);
}
catch { }
調用：
static
void Main(string[] args)
Console.WriteLine("key為字元串");
Dictionary<string,
object> testDictioary = new Dictionary<string,
int flag = 0;
do
{
Random random = new Random();
int temp = random.Next(100);
int tempValue = random.Next(100);
string keyString =
string.Format(@"{0}+{1}", temp, tempValue);
if (!testDictioary.ContainsKey(keyString))
{
testDictioary.Add(keyString,
}
flag = testDictioary.Count;
} while (flag < 20);
Console.WriteLine("未排序前:");
foreach (string key
Console.Write(string.Format(@"{0} ", key));
}
Console.WriteLine();
CustomOtherSort.Sort(testDictioary);
Console.WriteLine("排序後:");
Console.ReadLine();
}
結果：