使用linq从lastname +“，” + firstname的组合中搜索名字

Question

i have written a stored procedure which returns me Customer Name in below format

LastName+", "+FirstName

i have assign it to Class of properties like below.

Customer = DbContext.ExecuteStoreQuery<SearchEmployeeCDTO>("exec GetCustomerDetails").AsQueryable().ToList();

now i want to search the lastName like below i have done for Customer companyName

if(CompanyName!=null && LastName==null)
Customer = Customer.Where(c => c.CompName.Contains(CompanyName)).ToList();

please suggest how i can search for the LastName from combination of lastName and FirstName format

thanks,

Answer 1

Maybe this?

if(LastName!=null)
  Customer = Customer.Where(c => c.CustName.StartsWith(LastName)).ToList();

Answer 2

if you try to check the values which another list contains the same or not then you can use this : (if you retrieve these as different properties of the generic list element)

bool b = your1stList.Exists(c=> c.firstName == your2ndList.firstName ,
                               c.middleName == your2ndList.middleName ,
                               c.lastName  == your2ndList.lastName)

if ( b == true) 
{ 
  MessageBox.Show("You already have this Customer"); 
}

this is a good way to retrieve all properties without any concatanation activity..Saves you from some headaches in futural queries ;)

In the other hand, if we continue from your query then you need to get the value of lastname + firstName into a string and use String.Split(",") function to put in a string array then if the word lastName+firstname check the array[0] index for the lastname and array[1] for the firstname .

Choose which way you want..