我想创建一个基于列值的动态对象使用LINQ

Question

基于列的值我试图创建一个具有特定属性值的对象。我如何修改下面的查询来做到这一点？
//对象alertCode具有“code”属性，“description”代码将根据查询返回的alert_type值进行设置。

var medicalcodes = new string[]{"M", "D", "5"}; 
var specialedcodes = new string []{"C", "I"}; 
var personalcommentscodes = new string []{"A"}; 
var academiccodes = new string[]{"R", "E", "S"}; 

List<alertCode alertCollections = (from a in alertinfo 
            select new alertCode{ 
             where medicalcodes.Contains(a.alert_type) 
             code = 'M', 
             where specialcodes.Contains(a.alert_type) 
             code = 'S', 
             where personalcommentscodes.Contains(a.alert_type) 
             code = 'P', 
             where academiccodes.Contains(a.alert_type) 
             code = 'A', 
             desc = a.description 
            }).ToList(); 

Answer 1

我已经搬到码计算，以单独的方法

var query = alertinfo.Select(a => new alertCode() 
         { 
         code = GetCodeFor(a.alert_type), 
         desc = a.description 
         }).ToList(); 

码计算：

private char GetCodeFor(string alertType) 
{ 
    if (medicalcodes.Contains(alertType) 
     return 'M'; 
    if (specialcodes.Contains(alertType) 
     return 'S'; 
    if (personalcommentscodes.Contains(alertType) 
     return 'P'; 
    if (academiccodes.Contains(alertType)) 
     return 'A'; 

    // return default value 
}