Accessing a property of a non-static class without assigning it to a variable-CodePudding

I am writing a custom automation framework using Selenium, C# and Page Object Pattern. I am trying to extract some values from the pages without stopping the statement.

Basically I want to turn this:

    var page = Login()
        .OpenPage();

    page.Remember(page.Title);
    page.MoreActions()
        .MoreNavigation();

into this:

    var page = Login()
        .OpenPage()
        .Remember(???.Title)
        .MoreActions()
        .MoreNavigation();

Not sure if it is possible and how I could access the class at that point.

Notes:

All the methods return pages
Making the classes static and using the class name is not an option as we have our page structure based on inheritance and overloading methods.
Creating RememberTitle methods on all the pages is not an option because I want to remember the value into a Dictionary of parameters and such a parameter cannot be passed by reference.

Update: As per comments I tried implementing a lamda expression:

  .Remember(parameters["Title"], p => p.Title);

public virtual NavPage<T> Remember(TestParameter parameter, Expression<string> value)
        {
            parameter.Value = value.Compile();
            return this;
        }

This does not work as I am not sure who p should be. The question here would be: is there any way (keyword?) to point to the page returned by the previous statement?

CodePudding user response：

The only way to access a non-static variable from a static method is by creating an object of the class the variable belongs to.

CodePudding user response：

What you can do is to write an extension method to achieve your desired result. Let's say the page that you mentioned is of type Page & the Title that you've mentioned is of type string. Then you can have the following extension method:

public static Page Remember(this Page page, Func<Page, string> getTitle)         
{             
    var title = getTitle(page);             
    // Use the title
    page.Remember(page.title);

    // Return page object for further chaining
    return page;         
}

Then you can use this extension method the following way:

 var page = Login()
    .OpenPage()
    .Remember(p => p.Title)
    .MoreActions()
    .MoreNavigation();