Styjun

I am developing one C# application which is used to retrieve data from Dynamics CRM Online. To validate the User Name and Password of Dynamics CRM I am using the WhoAmIRequest. It works fine until the below scenario occures.

1)Connect the Dynamics CRM with Valid URL, User Name and Password.

2) Dispose the Organization Service Object.

3) Reconnect the Dynamics CRM with Valid URL, User Name and Invalid Password.

In this scenario also the WhoAmIRequest got executed Successfully. But it should fail.

Below is the code i am using:

private void button6_Click(object sender, EventArgs e)
 
 CrmConnection connection;
 string url = "Url=https://mytest.crm.dynamics.com ;Username=mytest@mytest.onmicrosoft.com; Password=goodpassword;";
 connection = CrmConnection.Parse(url);
 OrganizationService orgService = new OrganizationService(connection);
 Guid userid = ((WhoAmIResponse)orgService.Execute(new WhoAmIRequest())).UserId;
 if (userid == null)
 MessageBox.Show("Login Failed");
 else
 MessageBox.Show("Login Success");
 orgService.Dispose();

 url = "Url=https://mytest.crm.dynamics.com ;Username=mytest@mytest.onmicrosoft.com; Password=badpassword;";
 connection = CrmConnection.Parse(url);
 orgService = new OrganizationService(connection);
 userid = ((WhoAmIResponse)orgService.Execute(new WhoAmIRequest())).UserId;
 if (userid == null)
 MessageBox.Show("Login Failed");
 else
 MessageBox.Show("Login Success");
 orgService.Dispose();

 url = "Url=https://mytest.crm.dynamics.com ;Username=mytest@mytest.onmicrosoft.com; Password=goodpassowrd;";
 connection = CrmConnection.Parse(url);
 orgService = new OrganizationService(connection);
 userid = ((WhoAmIResponse)orgService.Execute(new WhoAmIRequest())).UserId;
 if (userid == null)
 MessageBox.Show("Login Failed");
 else
 MessageBox.Show("Login Success");
 orgService.Dispose();
 

The output of above code shows 3 message box as

Login Success

Login Success

Login Success

But it should show as

Login Success

Login Failed

Login Success

I have also tried the answer suggest by Nicknow in the the Need to validate CRM credentials Question but nothing helps

Any help will be highly appreciated.

Thanks and Regards
Venkatesan

The problem is in your check here:

if (userid == null)

UserId is a Guid, Guid is a struct, a struct is a value type, and a value type will never be null, so that check always returns false.

See here for more information Guid == null should not be allowed by the compiler

I would suggest using the following check instead:

if (userid == Guid.Empty)

You need to change this line because that is a static method:

connection = CrmConnection.Parse(url);

To something like:

connection = new CrmConnection();
connection.ServiceUri = new Uri("https://mytest.crm.dynamics.com");
var clientCredentials = new ClientCredentials();
clientCredentials.UserName.UserName = "mytest@mytest.onmicrosoft.com";
clientCredentials.UserName.Password = "goodpassword";
connection.ClientCredentials = clientCredentials;

I was experiencing the same issue and i found a solution for this! So here is my connection string:

Url=mytestcrm.crm.dynamics.com;Username=myUser@MyDomain.com;Password=MyPassword;authtype=Office365;RequireNewInstance=True

Note the "RequireNewInstance=True" to the end of the connection string, it will do the trick.

Give it a try and it will resolve the issue.