error while converting system.collection.objectmodel.observation to generic list

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C#

void loginfn(object sender, loginCompletedEventArgs e)
  {

      if (e.Result!= null)
      {

          List<customer> c = e.Result;//error arises in this line 

          foreach (customer c1 in c)
          {
            Guid  id=c1.companyrefid;
          }
         
      }
      else
      {
          MessageBox.Show("password not correct ");
      }

  }

through wcf i am getting values
public List<customer> login(string salesmanname, string usercode)

Posted 1-Jun-14 19:03pm

Nandhini Devi

Updated 1-Jun-14 22:01pm

Nelek

v3

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Comments

Karthik_Mahalingam 2-Jun-14 1:24am

what is the Type of e.Result ??

Nandhini Devi 2-Jun-14 1:25am

it contains list which i got from wcf service

Karthik_Mahalingam 2-Jun-14 1:41am

how many items are expected in the list ?
hopefull one ???

Nandhini Devi 2-Jun-14 1:52am

2 items i can see items in e.result but not able to assign

Karthik_Mahalingam 2-Jun-14 1:58am

make sure that the last item in the list has values, because in the looping, the variable will store only the last item in the collection.

Nandhini Devi 2-Jun-14 2:50am

all values are there only but still not able to assign

4 solutions

Solution 3

Try this

C#

System.Collections.ObjectModel.ObservableCollection<customer> temp = e.Result;

           foreach (var item in temp)
           {
               Guid companyrefid = item.companyrefid;
               int id = item.id;
           }

Posted 1-Jun-14 19:55pm

Karthik_Mahalingam

Updated 1-Jun-14 19:56pm

v2

Comments

Nandhini Devi 2-Jun-14 1:58am

no still values not getting assigned in id and companyrefid ... can anyone tell reason why its not getting assigned ?

Solution 2

1. e.Result must be (OR must contain as cached) an object of type:

C#

List<customer>

OR

C#

List<ParentOfCustomerClass>

2. You should use an explicit cast:

C#

<List<customer> c = (List<customer>)e.Result;

Posted 1-Jun-14 19:27pm

Raul Iloc

Updated 2-Jun-14 0:24am

v2

Comments

Nandhini Devi 2-Jun-14 1:34am

i am getting error like this again "error while converting system.collection.objectmodel.observation to generic list"

Raul Iloc 2-Jun-14 6:25am

See my update!

Solution 1

Try not casting :

C#

foreach (customer c1 in e.Result)
...

Posted 1-Jun-14 19:25pm

Mehdi Gholam

Comments

Nandhini Devi 2-Jun-14 1:36am

i used this method but value is not getting assigned in id and company but i can see value in c1 using breakpoint
foreach (customer c1 in e.Result)
{
Guid companyrefid = c1.companyrefid;
int id = c1.id;
}

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Nandhini Devi · Accepted Answer · 2014-06-01T21:15:00

Solution 4

C#

ObservableCollection<customer> temp = new ObservableCollection<customer>(e.Result);

          foreach (var item in temp)
          {
                  companyrefid= item.companyrefid;
                  int id = item.id;
                  //  MessageBox.Show("id:"+id).ToString();
          }

its working fine now

Posted 1-Jun-14 21:15pm

Nandhini Devi

Updated 1-Jun-14 22:01pm

v2

Comments

Karthik_Mahalingam 2-Jun-14 4:11am

mark it as answer and close the post.