MVVM Architecture When Using Web Services For Database Interaction - Part Two

This article is in continuation of my previous article MVVM Architecture When Using Webservices For Database Interaction. Let's see how to use the events and commands described in the previous article.

So, let's define the Guid variable _token in CompanyDetail View and ViewModel.

Let's create a helper class to send a request and get a response for View navigation.

Let's start by taking an example.

We will be creating a View (Window) for company details and then, we need to match if those details occur in our database. Let's do it step by step.

Step 1

Create the architecture as discussed in previous article, MVVM Architecture When Using Webservices For Database Interaction.

Step 2

Add a window under View section in main project. I named it as CompanyDetails.

Step 3

On cs page of the above View, let's define a property GUID _token, to differentiate the requests received from Views.

Then, as we know the password will be a secured string, to get the value of the passwordBox, we cannot use the direct bindings as we have used in case of other textboxes. Please see the XAML provided above. Password is yet not bound to any property of ViewModel.

So, we need to implement an interface to the View which will be used to access the password string. So, this interface will help the View to get secure password string and that can be converted back to insecure string in View Model.

Binding for commands is done on Buttons.

Let's create an interface to the CommonClasses for above purpose, which will contain the below code.

Now, for getting the response as we have discussed earlier, we will be receiving the message at the end of each command. So, let's create a Message class as a helper. Keep it separate from the above architecture and add Helper project to the existing solution.

As you can see from the above screenshot, we need to create a class ‘Message’ containing the message properties.