Error while searching for a specific record in a list

Question

3.00/5 (1 vote)

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I am searching for a specific record in the list

List<Customer> IService1.get(string str)
       {
         var result = cutomerList.Find(x => x.CustomerName == str);
         return result;
       }

but i am getting an error like below when i return the result

XML

Cannot implicitly convert type 'WCFExample.Customer' to 'System.Collections.Generic.List<WCFExample.Customer

here is my list

C#

public static List<Customer> cutomerList = new List<Customer>()
        {
       new Customer {CustomerID = 1, CustomerName="Sujeet",
       Address="Pune", EmailId="test@yahoo.com" },
       new Customer {CustomerID = 2, CustomerName="Rahul",
       Address="Pune", EmailId="test@yahoo.com" },
       new Customer {CustomerID = 3, CustomerName="Mayur",
       Address="Pune", EmailId="test@yahoo.com"}
        };

Posted 7-Aug-13 2:54am

shacha

Updated 7-Aug-13 2:56am

v2

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4 solutions

Solution 2

This is an easy one if you just read the exception and look at your code.

Your property code is returning a single Customer object and the property definition say it's going to return a List<customer>. The error says that you can't implicitly convert a Customer to a List<customer>. So what do you think you should do to fix that??

If it should be returning a single customer and not a list of them, what do you think you should be changing and to what??

Posted 7-Aug-13 3:01am

Dave Kreskowiak

Solution 3

When i search in the list i have to get the record of that specific person.

I am confused :\

Posted 7-Aug-13 3:08am

shacha

Comments

Fredrik Bornander 8-Aug-13 3:27am

I added a code sample on how to change your get method to my answer. Hope this helps.

Solution 4

The problem is i have customer class like

C#

List<customer> get(string str);</customer>

C#

[DataContract]
   public class Customer
   {
       [DataMember]
       public int CustomerID { get; set; }
       [DataMember]
       public string CustomerName { get; set; }
       [DataMember]
       public string Address { get; set; }
       [DataMember]
       public string EmailId { get; set; }
   }

When i tried as u said i am getting an error like
Cannot implicitly convert type 'WCFExample.Customer' to 'System.Collections.Generic.List<wcfexample.customer>'

any help??

Posted 9-Aug-13 5:21am

shacha

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Fredrik Bornander · Accepted Answer · 2013-08-07T02:59:00

List.Find returns a single item from the list, but your IService1.get has List<Customer> as it's return type.
Change the return type to string;

C#

Customer IService1.get(string str)
{
   var result = cutomerList.Find(x => x.CustomerName == str);
   return result;
}

You're looking for a single item so it makes no sense for the method to return a list of items.

List<T>.Find finds a single item (or none), so your method needs to return the same type.

Hope this helps,
Fredrik

Error while searching for a specific record in a list

4 solutions

Solution 1

Solution 2

Solution 3

Solution 4

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