Hi to all,
I have problem with detecting null values in datagrid cell
here is the example code i get i get runtime error when i'm trying to
convert datagrid cell to string if it have null value  and i want to

If I bind multiple properties of a single control to different sources,
only the first one ever works. For example, I subclass a TextBox and
add an IsLocked property. I then add bindings for the Text property and
my new IsLocked property, but only the first property will ever be

I have a datagrid with some columns that cause recalculation of values
in controls elsewhere on my form.  These recalculations need to occur
when these datagrid cells have changed (I tied to the Validated event).
This is also true for the AddNew row.

I assumed that the CurrencyManager's ItemChanged event could be used to
identify that some part of a row has changed and allow for the opportunity to
ask the user if they want to keep the change (or not) prior to changing the
CurrencyManager's position.

I have a textbox which has a read-only proprety. which it's text can be
selected and copied but not edited.
but i didn't find readonly property for a combobox. setting enabled property
to false will make it disabled. the text can't be selected or copied.

I would like for WinForms Datagrid cells whose value has changed to
stand out in some way - background color, font etc. I know that I can
override the paint event to change cell appearance, but paint is not
useful to me for detecting when cell contents have changed. I also know

I have a textbox which has a read-only proprety. which it's text can be
selected and copied but not edited.
but i didn't find readonly property for a combobox. setting enabled property
to false will make it disabled. the text can't be selected or copied.

i'm a complete newby to the adonet stuff. so i'm facing beginner problems.
i have a DataGrid bound to a table called data
    dataGrid.DataSource = data;
data gets filled by a DataAdapter da

I am using Visual C# Express (.net 2.0) and I am wondering if there is
a way to reset a form.  I come from asp.net and I am used to binding
the data in code during the page load event.  Winforms offers
databinding more like ms access, where you can bind the form directly

I have Custom Collection with Custom Object which has Guid as Id - I bind
DataGridView into it and it works BUT if I make one Column as
DataGridViewComboBoxColumn the trouble becomes.
If the DataGridViewComboBoxColumn ValueMember property type is Guid I get

I'm currently reading on .NET data binding and I'm trying to do one of the
sample programs in the book. There is a text box bound to a property of an
array, and a previous/next button. The book mentions that if there are many
controls bound to the same element I do not have to take ...

Situation:
----------
1) I've created DataAdapters to about a dozen tables in msAccess (1  
adapter per table)

I have created a class BoundList<T> class that implements IBindingList that
wraps a List<T>.
I create a List<T> and add four objects to it
I set a BindingSource's DataSource property to an instance of this

I'm trying to do some very simple databinding, with a buttons enabled
property and a custom class and i'm a bit confused.
I have this:
class Model

   I have 2 questions regarding this issue:
   1st. Why this code gives me the lenght of the string instead the string
itself?
Dim a As New ArrayList