Implicit operation! Help please

Hi people!

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

Like this

Code:

---

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

Code:

---

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

Code:

---

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 :afrog:

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:

Code:

---

                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;}
                        }
                }

---

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

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.