我希望能够在linq表达式中重构出OrderBy子句。重构OrderBy表达式
这里是其中子句的
前一重构的一个示例:
results = ctx.ActiveUsers
.Where(u => u.CompanyID != 1 &&
(u.LastName.ToLower().Contains(searchString)
|| u.Email.ToLower().Contains(searchString)
|| u.Company.Name.ToLower().Contains(searchString)))
.OrderBy(u => u.LastName).ThenBy(u => u.FirstName)
.Select(u => new Employee {
ID = u.ID
, FirstName = u.FirstName
, LastName = u.LastName
, Email = u.Email
, CompanyName = u.Company.Name
, CompanyID = u.CompanyID.ToString() });
后:
results = ctx.ActiveUsers
.Where(Employee.GetExpression(searchString))
.OrderBy(u => u.LastName).ThenBy(u => u.FirstName)
.Select(u => new Employee {
ID = u.ID
, FirstName = u.FirstName
, LastName = u.LastName
, Email = u.Email
, CompanyName = u.Company.Name
, CompanyID = u.CompanyID.ToString() });
private static Expression<Func<User, bool>> GetExpression(string searchString)
{
Expression<Func<User, bool>> p = (u => u.CompanyID != 1 &&
(u.LastName.ToLower().Contains(searchString)
|| u.Email.ToLower().Contains(searchString)
|| u.Company.Name.ToLower().Contains(searchString)));
return p;
}
我在想,除非我想重构Orderby表达式,否则我想知道是否可以使用相同类型的东西。
预先感谢您
你需要给你想要什么样的重构的一个例子。我可以看到你为一个searchString做了什么,但是一个排序并不是那样的...... – 2008-12-17 16:00:52