Implicit operation! Help please

[RohanWest]

Hi people!

I have created a class that contains a single DateTime property, called Date.

Like this

class MyDate
{
	private DateTime _date;

	public MyDate(DateTime defaultValue)
	{
		_date = defaultValue;
	}

	public DateTime Date
	{
		get{return _date;}
		set{_date = value;}
	}
}

I have also created another class that has an Instance of MyDate stored inside

public class MyOtherClass
{
	private MyDate _myDate;
	
	public MyOtherClass
	{
		_myDate = new MyDate(DateTime.Now);
	}

	public MyDate MyDate
	{
		get{return _myDate;}
		set{_myDate = value;}
	}
}

Its all quite simple... What i want to do is bind the property MyDate in the MyOtherClass to the Text property of a TextBox

this.TextBox1.DataBindings.Add("Text",anInstanceOfMyOtherObject,"MyDate")

This is fine, when the code executes the ToString method of MyDate is called and the current date is displayed... Oh... the ToString method is not shown above...

Now when i change the value in the text box i want to update the value in anInstanceOfMyOtherObject.MyDate.Date

I have tried writting implicit conversions for converting string to MyDate objects but this isn't working. Any suggestions?

Thanks Rohan

[sevenhalo]

The reason you're getting an implicit conversion is because you're attempting to bind it to a reference type property instead of a data type. If you want to use that second layer down the nest, you need to do something like this:

		private MyOtherClass anInstanceOfMyOtherObject;
		
		private void Form1_Load(object sender, System.EventArgs e)
		{
			anInstanceOfMyOtherObject = new MyOtherClass();
			this.textBox1.DataBindings.Add("Text", anInstanceOfMyOtherObject.MyDateProperty, "Date");
		}

		public class MyDate
		{
			private DateTime _date;

			public MyDate(DateTime defaultValue)
			{
				_date = defaultValue;
			}

			public DateTime Date
			{
				get{return _date;}
				set{_date = value;}
			}
		}

		public class MyOtherClass
		{
			private MyDate _myDate;
	
			public MyOtherClass()
			{
				_myDate = new MyDate(DateTime.Now);
			}

			public MyDate MyDateProperty
			{
				get{return _myDate;}
				set{_myDate = value;}
			}
		}

[RohanWest]

This is exactly what I was trying to not to do. I dont want to specify the Date property in the data bindings, i want the text in the textbox to be implicitly converted to MyDate object

[mendhak]

Then either let your MyDate property be a string which you validate whenever it is assigned, or inherit the textbox, make your own and let its text property/custom property return a date.

OR

Use a datetime picker.

OR

Create your own custom control for this purpose, such as three comboboxes.