Passing CheckBox Values between UserControls

Question

I am trying to pass a CheckBox value from UserControl3 to UserControl1

On UserControl3

public void materialCheckBox1_CheckedChanged(object sender, Ev         


        

Answer 1

Work with delegates!

To read more about that click here! For more check this msdn article out.

Answer 2

There are multiple solutions for communication between controls.

You have seen such functionality in interaction between controls like BindingNavigator and Bindingource where the BindingNavigator has a property of type BindingSource and each time you click on navigation buttons, the BindingNavigator calls methods of BindingSource.

To implemenet it for yourself, for example in UserControl2 you can create a public property exposing the information which you want the UserControl1 be able to check, then in the UserControl1, you should have a property of type of UserControl2. This way when you assign the instance of UserControl2 to the property at design-time or run-time, then you can use exposed information.

For example follow these steps:

1) In your UserControl2, expose the information which you need to use outside of control.

public bool CheckBoxValue 
{
    get { return checkBox1.Checked; }
    set { checkBox1.Checked = value; }
}

2) In your UserControl1, create a property of type UserControl2. So you can use the instance which is assigned to it and find the value of CheckBoxValue property.

public UserControl2 UserControl2Instance { get; set; }

private void button1_Click(object sender, EventArgs e)
{
    if(UserControl2Instance!=null)
    {
        if(UserControl2Instance.CheckBoxValue)
            MessageBox.Show("Checked");
        else
            MessageBox.Show("Unchecked");
    }
}

3) Drop both UserControl1 and UserControl2 on the form and using designer (or at run-time) assign the instance of UserControl2 to UserControl2Instance property of UserControl1. Then when you run the program and click on Button1 of your UserControl1, you can see the value of checkBox1 which is located on UserControl2.