winforms: Bind int to a control

[SteveK]

I have a text box and I simply want to bind it to an int variable. I'm
testing how all this stuff works and I wanted to test if I increment the
int, will the textbox update automatically, however I didn't get far cause I
can't get binding to work with an int OR I should say it wants an object and
a member..

Any tips or heads-ups?

Thanks-
Steve

[Nicholas Paldino [.NET/C# MVP]]

Steve,

You won't be able to do this. You will need an object that stores the
int, and exposes it as a property, also firing an event when it changes. An
int is a value type, and doesn't have any mechanism to indicate when the
value changes.

Your only choice would be to create an object with a property that
exposes this, and an event that fires (named correctly <property
name>Changed of type EventHandler) when the property changes.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"SteveK" <as***@asdfasdfsd.com> wrote in message
news:%2******************@TK2MSFTNGP10.phx.gbl...

I have a text box and I simply want to bind it to an int variable. I'm
testing how all this stuff works and I wanted to test if I increment the
int, will the textbox update automatically, however I didn't get far cause
I
can't get binding to work with an int OR I should say it wants an object
and
a member..

Any tips or heads-ups?

Thanks-
Steve

[SteveK]

Thanks Nicholas,

I switched over to just use a DataTable, I figure it's all built in and for
testing purposes it would be easier ;)

Thanks for the quick response though!.
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.com> wrote in
message news:%2****************@TK2MSFTNGP09.phx.gbl...

Steve,

You won't be able to do this. You will need an object that stores the
int, and exposes it as a property, also firing an event when it changes. An int is a value type, and doesn't have any mechanism to indicate when the
value changes.

Your only choice would be to create an object with a property that
exposes this, and an event that fires (named correctly <property
name>Changed of type EventHandler) when the property changes.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"SteveK" <as***@asdfasdfsd.com> wrote in message
news:%2******************@TK2MSFTNGP10.phx.gbl...

I have a text box and I simply want to bind it to an int variable. I'm
testing how all this stuff works and I wanted to test if I increment the
int, will the textbox update automatically, however I didn't get far cause I
can't get binding to work with an int OR I should say it wants an object
and
a member..

Any tips or heads-ups?

Thanks-
Steve

[Morten Wennevik]

Hi Steve,

You can bind it to a property that reflects an int

private int myint = 0;
public int Val
{
get { return myint; }
set { myint = value; }
}
textBox1.DataBindings.Add("Text", this, "Val");

This will initially update the textbox and any later changes to the textbox will be stored in the int. However, if you change the int internally it will not update the textbox. If you do that, you need to update the textbox by calling ReadValue on the databinding

textBox1.DataBindings["Text"].ReadValue();
--
Happy Coding!
Morten Wennevik [C# MVP]