求 字符串中相同字符的个数。。。。。
假设随便输入字符串  adfdfkeaaaldcleidlfadtuduu
判断出 有多少个a 多少个d 等等
在C#中怎么写?
------解决方案--------------------string s = "adfdfkeaaaldcleidlfadtuduu";
Dictionary <char,int> dic = new Dictionary <char,int>();
for(int i=0;i<s.length;i++)
{
 if(dic.Contains(s[i]))
 {
   dic[s[i]]= dic[s[i]]+1;
 }
 else
 {
  dic.Add(s[i],1);
 }
}
------解决方案--------------------不会LINQ 好象LINQ一行就可以了
给你个循环的把
  private void button2_Click(object sender, EventArgs e)
       {           
           Dictionary<char, int> _Value = GetTextCount("adfdfkeaaaldcleidlfadtuduu");
       }
       public Dictionary<char, int> GetTextCount(string p_Text)
       {
           Dictionary<char, int> _Re = new Dictionary<char, int>();
           while (true)
           {
               int _Value =p_Text.Length;
               char _CharKey = p_Text[0];
               p_Text = p_Text.Replace(_CharKey.ToString(), "");
               _Re.Add(_CharKey, _Value - p_Text.Length);
               if (p_Text.Length == 0) return _Re;
           }        
       }
------解决方案--------------------思路:
1.取字符串长度1,
2.取第一个字符x,
3.将字串中的x全部替换成空,将值赋给原串
4.再取字串长度2
5.两个长度之差就是x的个数
6.循环,直到字串为空.
------解决方案--------------------修改了string s = "adfdfkeaaaldcleidlfadtuduu";  
Dictionary <char,int> dic = new Dictionary <char,int>();  
for(int i=0;i <s.length;i++)  
{  
 if(dic.ContainsKey(s[i]))  
 {  
   dic[s[i]]= dic[s[i]]+1;  
 }  
 else  
 {  
 dic.Add(s[i],1);  
 }  
}  
------解决方案--------------------正则表达式。。判断匹配次数。。。汗
------解决方案--------------------
------解决方案--------------------C# code
 string str = "adfdfkeaaaldcleidlfadtuduu ";
            Regex re = new Regex(@"a");
            MatchCollection mac = re.Matches(str);
             int a =0;
            foreach (Match m in mac)
            {
               a = Regex.Matches(str, m.Value).Count;
                //Console.WriteLine(m.Value);
            }
            Console.WriteLine(a);
------解决方案--------------------
不是很了解C#,学习中,不过我觉得这个应该很容易实现
------解决方案--------------------
C# code
string str = "adfdfkeaaaldcleidlfadtuduu ";
Regex reg = new Regex(@"a", RegexOptions.Singleline);
Console.WriteLine(reg.Matches(str).Count);
------解决方案--------------------
using System;
using System.Collections;
class SetArray
{
   static public Hashtable TestStr(string str)
   {
       char[] a = str.ToCharArray();
       Hashtable table = new Hashtable();
       for (int i = 0; i < a.Length; i++)
       {
           if (str.Substring(0, i).IndexOf(a[i]) == -1)
           {
               int count = 0;
               foreach (char x in a)
               {
                   if (x == a[i])
                   {
                       count++;
                   }
               }