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

Question

0.00/5 (No votes)

See more:

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

Add a Solution

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 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;
}

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 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 ?

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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.