Is there a way to share variables or properties between two classes?

For example, I have a Blazor web app with 2 pages and 2 partial classes. How can I share the variable A from class 1 with class 2?

Is there a way to do this?

I would be very grateful for an answer.

CodePudding user response：

You could transfer the property through the parameter of the constructor. So for instance you are in Form1 and want to transfer variable_A to Form2 then you simply put variable_A in the constructor of Form2.

The code in Form1:

 private void GoToSecondForm_Click(object sender,eventarg e)
 {
   Form2 f = new Form2(variable_A);
   this.Hide();
   f.ShowDialog();
 }

Code in the constructor of Form2:

 {dataType} variable_A;
 public Form2({dataType} variable_A)
 {
   InitailizedComponent();
   this.variable_A = variable_A;
 }

If you do this then you will be able to use a variable in another form.

CodePudding user response：

If you have a class with a member variable that you want to be accessed in another class, you will want to include accessor/mutator (getter/setter) methods in the first class. For example, if you had two classes A and B, and A had a variable x that you wanted to access, you would do something like this:

public class A {
  private int _x = 0;

  public int getX() {
    return this._x;
  }
  public void setX(int x) {
    this._x = x;
  }
}


public class B {
  A a = new A();

  public int returnX() {
    a.setX(8);
    return a.getX();
  }
}

The returnX function would return 8 in this case. If we didn't set _x to 8, it would return 0, as that is what _x is initialized to when new A() is called. You can make _x a public variable and access it by writing something like a._x in B, but this is generally considered bad practice.