首先我们看下String.Split 方法有6个重载函数：
1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)
2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)
下边我们通过一些实例来说明下怎么使用(以下string words =
"1,2.3,,4";)：
1. public string[] Split(params char[] separator)
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2. public string[] Split(char[] separator, int count)
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3. public string[] Split(char[] separator, StringSplitOptions options)
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4. public string[] Split(string[] separator, StringSplitOptions options)
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5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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个人理解：Split 就是和String.Join相反的一个函数 它的作用是把一个字符串分隔成含有多个字段的数组
1. public string[] Split(params char[] separator)
string[] split = words.Split(new Char[] { \',\'
});//返回:{"1","2.3","","4"}
string[] split = words.Split(new Char[] { \',\', \'.\' });//返回:{"1","2","3","","4"}
string[] split = words.Split(new Char[] { \',\', \'.\' });//返回:{"1","2","3","","4"}
2. public string[] Split(char[] separator, int count)
string[] split = words.Split(new Char[] { \',\', \'.\' },
2);//返回:{"1","2.3,,4"}
string[] split = words.Split(new Char[] { \',\', \'.\' }, 6);//返回:{"1","2","3","","4"}
string[] split = words.Split(new Char[] { \',\', \'.\' }, 6);//返回:{"1","2","3","","4"}
3. public string[] Split(char[] separator, StringSplitOptions options)
string[] split = words.Split(new Char[] { \',\', \'.\' },
StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
string[] split = words.Split(new Char[] { \',\', \'.\' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
string[] split = words.Split(new Char[] { \',\', \'.\' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
4. public string[] Split(string[] separator, StringSplitOptions options)
string[] split = words.Split(new string[] { ",", "." },
StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
5. public string[] Split(char[] separator, int count, StringSplitOptions options)
string[] split = words.Split(new Char[] { \',\', \'.\' }, 2,
StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
string[] split = words.Split(new Char[] { \',\', \'.\' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
string[] split = words.Split(new Char[] { \',\', \'.\' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
6. public string[] Split(string[] separator, int count, StringSplitOptions options)
string[] split = words.Split(new string[] { ",", "." }, 2,
StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
string[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
string[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
个人理解：Split 就是和String.Join相反的一个函数 它的作用是把一个字符串分隔成含有多个字段的数组
我现在只对上面的一种方法进行分析：
string[] split = words.Split(new Char[] { \',\', \'.\' },
6);//返回:{"1","2","3","","4"}
为什么返回的有了个空的“” 呢,自己当时也是不理解
其实它就是以" , " 和“ . " 两个分隔符来拆分 字符串 1,2.3,,4的 当找到 3 后面的第一个”, “
时候说明此处要分开了
但是它后面又是一个分隔符 ”, " 怎么办呢 这是就只能当成 " " 空来处理了 你可以变相的把
1,2.3,,4连续的两个" , "间 认为有个空格符“ “也可以。不对的地方请大家帮指出来 不胜感激 。