Orderby 使用 C# LINQ

Question

我想在 LINQ

中转换以下 SQL 查询

Select * from EmpCode order by Left(EmpCode,4) Right(EmpCode4)

是否可以像这样进行 LINQ 查询？

Answer 1

如果我能正确读出你的错别字

var result = listOfEmpCode.Orderby(x => x.SubString(4))
                          .ThenBy(x => x.SubString(x.Length-4))
                          .ToList();

注意：这不会检查有效的字符串长度.. 添加胡椒粉和盐调味

Enumerable.OrderBy Method (IEnumerable, Func)

Sorts the elements of a sequence in ascending order according to a key.

Enumerable.ThenBy Method (IOrderedEnumerable, Func)

Performs a subsequent ordering of the elements in a sequence in ascending order according to a key.

String.Substring Method (Int32, Int32)

Retrieves a substring from this instance. The substring starts at a specified character position and has a specified length.

Getting Started with LINQ in C#

而这一篇要彻底

https://whosebug.com/help/how-to-ask

Orderby 使用 C# LINQ

Orderby using C# LINQ

c#

linq

sql-order-by