如果列表對象爲零，則設置另一個值

Question

我有一個列表，

從這個列表中，當ID爲0然後分配用戶類型=「未知」。

我該怎麼做？

Answer 1

更換

UserType = "Documents Scanned" 

與

UserType = m.UserId != 0 ? "Documents Scanned" : "UnKnown" 

Answer 2

只需選中它設置列表時：

List<Model.UserSetUp> objUserSetUp = objUserSetUp1.Select(m => new Model.UserSetUp() 
     { 
      Id = m.UserId, 
      FirstName = m.FirstName, 
      SurName = m.SurName, 
      Computer_Name = m.Computer_Name, 
      IP_Address = m.IP_Address, 
      LogInTime = m.LogInTime, 
      UserName = Decrypt(m.UserName), 
      Password = Decrypt(m.Password), 
      login_Id = m.login_Id, 
      UserType = m.UserId == 0 ? "Unknown" : "Documents Scanned", 
      countID = m.docCount 
     }).ToList(); 

Answer 3

可以使用inline condition operator：

即

UserType = (m.id != 0) ? "Documents Scanned" : "UnKnown", 

Answer 4

您可以使用三元運算符來實現此目的。的

代替

UserType = "Documents Scanned", 

您可以鍵入

UserType = m.UserId == 0 ? UserType="UnKnown" :"Documents Scanned", 

Answer 5

List<Model.UserSetUp> objUserSetUp = objUserSetUp1.Select(m => new Model.UserSetUp() 
     { 
      Id = m.UserId, 
      FirstName = m.FirstName, 
      SurName = m.SurName, 
      Computer_Name = m.Computer_Name, 
      IP_Address = m.IP_Address, 
      LogInTime = m.LogInTime, 
      UserName = Decrypt(m.UserName), 
      Password = Decrypt(m.Password), 
      login_Id = m.login_Id, 
      UserType = m.UserId == 0 ? "UnKnown" :"Documents Scanned", 
      countID = m.docCount 
     }).ToList();