Json与数组
今天趁着看源代码的同时,记录学习的小知识。
一、String.Split 方法有6个重载函数:
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)
返回值:
类型:System.String[]
separator.‘
data-guid="7b28a9466989f487697b9306b7388e52">一个数组,其元素包含此实例中的子字符串,这些子字符串由 separator 中的一个或多个字符分隔。 有关更多信息,请参见“备注”一节。
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[] { ‘,‘, ‘.‘ }, 6);//返回:{"1","2","3","","4"}
3. public string[] Split(char[] separator,
StringSplitOptions options)
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.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[] { ‘,‘, ‘.‘ }, 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[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
需要注意的是没有重载函数public string[] Split(string[]
separator),所以我们不能像VB.NET那样使用words.Split(","),而只能使用words.Split(‘,‘)!很多人都很奇怪为什么把双引号改为单引号就可以了?看了上边的重载函数该知道答案了吧^_^
二、JSON.stringify 函数
将 JavaScript 转换为 JavaScript 对象表示法 (JSON) 字符串。
JSON.stringify(value [, replacer] [, space])
Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
Parameters:
Example:
var contact = new Object(); contact.firstname = "Jesper"; contact.surname = "Aaberg"; contact.phone = ["555-0100", "555-0120"]; var memberfilter = new Array(); memberfilter[0] = "surname"; memberfilter[1] = "phone"; var jsonText = JSON.stringify(contact, memberfilter, "\t"); document.write(jsonText); // Output: // { "surname": "Aaberg", "phone": [ "555-0100", "555-0120" ] }
三、DeserializeObject 方法
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