C#

public class SomeClass()
{
    public int MyProperty  { get ; set ; }
}

public class SomeClass()
{
    public int MyProperty  { get ; private set ; }
}

public class SomeClass()
{
    private int myProperty;

    public int MyProperty
    {
        get {return myProperty;}

        set 
        {
            if ( value <= 0 )
            {
                throw something ;
            }

            myProperty = value;
        }
    }
}

PIEBALDconsult wrote:

you could make it an automatic property instead:

PIEBALDconsult wrote:

some times you need to do more work in a Property

using System;
using System.ComponentModel;

public class PercentageControl : Component
{
    private const int DefaultPercentage = 50;
    public const int MaxPercentage = 100;
    public const int MinPercentage = 0;

    public event EventHandler PercentageChanged;

    private int percentage;

    public PercentageControl()
    {
        percentage = DefaultPercentage;
    }

    [DefaultValue(50)]
    public int Percentage
    {
        get { return percentage; }
        set
        {
            if (value >= MinPercentage && value <= MaxPercentage)
            {
                if (value != percentage)
                {
                    percentage = value;
                    OnPercentageChanged(EventArgs.Empty);
                }
            }
            else
            {
                throw new ArgumentOutOfRangeException(
                    "Percentage",
                    string.Format("Percentage must be between {0} and {1}",
                        MinPercentage, MaxPercentage));
            }
        }
    }

    protected virtual void OnPercentageChanged(EventArgs e)
    {
        EventHandler eh = PercentageChanged;
        if (eh != null)
            eh(this, e);
    }
}

Roger Wright wrote:

how does this construct "know" to associate the public MyProperty with the private myProperty

Roger Wright wrote:

...created all the form data members as private

Richard Blythe wrote:

By the way a property is compiled into two methods. get_Speed() and set_Speed().

Richard Blythe wrote:

so old dogs can learn new tricks!

Roger Wright wrote:

Question About Class Properties

electriac wrote:

the new form will not receive input unless I click on it

electriac wrote:

the compiler is the active form

Form2 dlg = new Form2();
dlg.temp = fname;
if(dlg.ShowDialog()==DialogResult.OK)
{ ...

electriac wrote:

Unfortunatly the new form will not receive input