Software Development Discussions

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This blog is dedicated to discuss the stones and strip on Software developments i'v gone through!

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  1. Chand PriyankaraFebruary 24, 2010 at 3:23 PM

    I have this scenario where a webservice method I'm consuming in C# returns a Business object, when calling the webservice method with the following code I get the exception "Unable to cast object of type ContactInfo to type ContactInfo" in the reference.cs class of the web reference

    Code:

    ContactInfo contactInfo = new ContactInfo();
    Contact contact = new Contact();

    contactInfo = contact.Load(this.ContactID.Value);
    Any help would be much appreciated.

    ReplyDelete
  2. Chand PriyankaraFebruary 24, 2010 at 3:23 PM

    actually this is not a bug. its a problem with the version changes of your own project! because your final run don't use the original imported references on compile!

    for example,

    i was making a chat server, client. i used a packet structure to transmit data on client project. then imported the same reference to server project. when casting...

    Packet packet = (Packet)binaryFormatter.Deserialize(stream);

    i got the same error.because the actual running reference at server project is not the reference now at client project! because i have rebuilt client project many times after!

    in casting .... =()

    always the new object need to be a newer or same version as the old object!

    so what i did was, i build a separate project to create a dll for the Packet class and imported the dll file to both projects. if i did any change to Packet class, i have to import the reference to both client and server again.

    then the casting wont give above exception!

    regards!

    ReplyDelete

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