linq 排序
linq 排序一、linq 排序用到的方法
| 方法名 | 说明 | C# 查询表达式语法 |
|---|---|---|
| OrderBy | 按升序对值进行排序。 | orderby |
| OrderByDescending | 按降序对值进行排序。 | orderby … descending |
| ThenBy | 按升序执行次要排序。 | orderby …, … |
| ThenByDescending | 按降序执行次要排序。 | orderby …, … descending |
二、linq 排序实例
1、 主要升序排序
string[] words = { "the", "quick", "brown", "fox", "jumps" };
IEnumerable<string> query = from word in words orderby word.Length select word;
foreach (string str in query) Console.WriteLine(str);
2、 主要降序排序
string[] words = { "the", "quick", "brown", "fox", "jumps" };
IEnumerable<string> query = from word in words orderby word.Substring(0, 1) descending select word;
foreach (string str in query) Console.WriteLine(str);
3、次要升序排序
string[] words = { "the", "quick", "brown", "fox", "jumps" };
IEnumerable<string> query = from word in words orderby word.Length, word.Substring(0, 1) select word;
foreach (string str in query) Console.WriteLine(str);
4、次要降序排序
string[] words = { "the", "quick", "brown", "fox", "jumps" };
IEnumerable<string> query = from word in words orderby word.Length, word.Substring(0, 1) descending select word;
foreach (string str in query) Console.WriteLine(str);