Question

I am working with someone else’s code and trying to make some modifications. So what I’m needing to do is take the following:

RemoteFileDP remoteFile = new DPFactory().CreateRemoteFileDP(configData);

And change it so that remoteFile can equal what is in a string variable. To further explain let me give some more of the code:

ConfigDP configData = new ConfigDP();

So the statement above is executed before the remoteFile statement and ConfigDP is has two classes above it (abstract Config and then its base: abstract ConfigBase). DP is also the child of two abstract classes above it (abstract RemoteFile and abstract RemoteFileBase).

From my understanding remoteFile is the result of data extracted from a database query, stored into a list or a Hashtable (sorry just an intern so I’m working through this).

The reason I need remoteFile to accept a string value is because there are MANY methods that utilize the information in remoteFile and I would like to avoid having to create a WHOLE BUNCH of overloaded methods that accept a string value instead of RemoteFileDP remoteFile.

So if I can take a string value like:

string locationDirectory;

which is passed in from another method and then have something similar to the following:

RemoteFileDP remoteFile = locationDirectory;

then all other methods using remoteFile will not have to be overloaded or changed.

Sorry for all the detail but this is my first time posting so I hope I provided enough information. I did look at C# Convert dynamic string to existing Class and C#: Instantiate an object with a runtime-determined type and wrote the following code:

RemoteFilesDP remoteFile = (RemoteFileDP)Activator.CreateInstance(typeof(RemoteFileDP), locationDirectory);

However I keep getting a “MissingMethodException” error that the constructor for RemoteFileDP is not found but I do have the constructor as seen below:

public RemoteFileDP()
    {
    } //end of RemoteFilePlattsDP constructor

Thank you ahead of time for your assistance!

Answer 1

You’re missing a constructor that takes a string as a parameter. Try your code with

public RemoteFileDP(string locationDirectory)
{
    // do stuff with locationDirectory to initialize RemoteFileDP appropriately
}

Of course, if you do that, why not just call the constructor directly?

RemoteFileDP remoteFile = new RemoteFileDP(locationDirectory);