Comments by Thomas Duwe (Top 40 by date)

How do you achive that the border turns red?
A good overview/introduction to validation you can find here:
http://www.codeproject.com/Articles/15239/Validation-in-Windows-Presentation-Foundation

The ListBox cannot perform the binding to TagPriorityOfValue1 because you changed the DataContext of the ListBox to the instance of the Settings class and this class doesn't contain a property TagPriorityOfValue1.

If you want further help then post the class which contains the TagPriorityOfValue1 property and I will show you what to do.

Of course this can't work.
If you set the DataContext of the ListBox to Settings, then the Binding Path=DataContext.Settings....
is wrong and it should be Binding Path=DataContext.band1TextColor.

And your setting of the DataContext of the ListBox was not what I said you should do.

Obviously you need to study a little bit more about DataBinding and XAML/code behind and what the DataContext really is.

As I said, you should define a property public Settings Settings {get; set;} in the object, that is the DataContext of your ListBox.
The DataContext of your ListBox is usually an instance of a class.
Where did you define the property TagValueOfPriority1?
There you should define the property for Settings, because your binding of the ItemsSource of the ListBox is a short version of the binding:
{Binding Path=DataContext.TagValueOfPriority1}.
So whereever you defined the property of TagValueOfPriority1 you should define the property for Settings and assign a valid instance to it.

You don't have to add the Settings to the ListBox. As I said, you need a property named Settings in the DataContext of the ListBox,
where the TagValueOfPriority1 property is defined.

Did you look here?:
http://www.codeproject.com/Articles/23116/WPF-Arrow-and-Custom-Shapes

Did you check the path to msenv100p.dll?
Try to re-register the msenv100p.dll and actxprxy.dll
Does this work?

If this is not working, try to start visual studio in safemode, try to run your website.

Other option is to reinstall Visual Studio

What OS are you running? 32bit or 64bit?
What Visual Studio version are you using?

Glad I could help :-)

If someone would like to look into your code and test it, this someone needs all the referenced classes and structs etc....

You didn't set a targetnamespace in b.xsd, so the targetnamespace from a.xsd is used.
Try to give b.xsd a different targetnamespace than a.xsd and the b.xsd xmlschema should have a different one.

Yes I understand your problem, but as I said, the DataGrid does not deselect a row if you only click with the mouse
on the selected row.
You must have somewhere code that unselects the row if you click the second time.

Ah sorry, how do you select the row twice? Only with left-mouse-click?
If so, then the deselection of the row shouldn't take place, it says selected, thats the default behavior of the DataGrid.
If this isn't the behavior you see, then you must have some code somewhere changing the selected row of the datagrid.

This is for row selection, not column....as you asked in your original question.

Why are you constantly reposting your question?
Look here:
http://www.codeproject.com/Questions/536127/usingplusaplusmissingplusdirectiveplusandplusassem

How about listening to the Selected/Unselected event of the CheckComboBox and if the 'All' item is selected(checked), then
set IsEnabled=false for all other items and optionally remove all other items from the SelectedItems property of the CheckComboBox.
That's really not the best way but it should work.

Thats an exact copy of the constructor of SpanNearQuery.java from the Lucene project.
Perhaps you should look at the Lucene.Net project page: http://lucenenet.apache.org/

I think you have to change the sql command.
Now you send a command with 2 select commands inside. Usually only the results of the second
command are retrieved from the database.

I think your command should be:
select sale.id,sale.name,sale.author,sale.price,bill.invc_id, bill.totalprice from sale, bill

Although this select statement really doesn't make much sense.

DataTrigger can be bound to any property (CLR and dependency property, whereas class containing CLR property needs to implement INotifyPropertyChanged interface)
Trigger can be bound only to Dependency Property.
Do you tried it?

Or try instead of Condition Binding={Binding Path=IsSelected...} -> Property=IsSelected

Please show the PreviewMouseLeftButtonDown code

And where is the problem summing up SalePrice? If you have a DataSet iterate the rows over the appropiate table in it
and get the right columns and build a sum of SalePrice*SolQuantity...?

Have a property (e.g. TotalSale) in MainWindow or somewhere else and bind it to a textbox.

And what's your problem? What have you tried?
Where is the ItemsSource property of the first listbox set?

Show some code....

I don't think this is something that can be done using only inputbindings.
What comes to mind is something like this: if user presses Ctrl+M, save the state and if the user presses again an M, then execute the appropiate command.

What do you mean with callout? What do you want to achieve?

Where is this exception generated/where is the origin of the exception?
Post a stacktrace of the exception.

without code to look at nobody can help you.
what are you doing in the selected event and what specifically is going wrong with the visibility of the groupbox?

Did you search the site for this?
I found:
http://www.codeproject.com/Articles/202464/How-to-use-a-WebCam-in-C-with-the-NET-Framework-4
or
http://www.codeproject.com/Articles/285964/WPF-Webcam-Control

Bye Thomas.

Yeah, I too was against code behind in this case, but I found no other way :-(

I suppose you are creating a Task or background thread in the MyDllClass and from this Task/background thread you access some properties/controls of the UI.

If that's the case then find further information here:
http://www.codeproject.com/Articles/37314/Useful-WPF-Threading-Extension-Method

I think this depends on how your view and viewmodel are created and shown.

Say if you have a view factory with some method ShowCustomDialog(args...)
and you instantiate your viewmodel and view and assigning the datacontext of the view manually in this factory method, there shouldn't be a problem (I think).

see my answer here for the same question:
http://www.codeproject.com/Answers/455040/WPF-How-to-set-focus-to-next-cell-in-datagrid#answer1

No, I see nothing wrong with your bindings, but you have no binding to your MaterialCode property in the grid-xaml.

Then maybe this has something to do with your autocompletebox not updating it's Text property. But without the code for you autocompletebox, I can't do anything further to help you.

You have to be a little more specific.

What datagrid are you using?
How is the list of data bound to the grid?
What's happening in your save method?

Some code would be really helpful, otherwise nobody can help you.

As I told you, if datacontext.selectTable1() returns an instance of DataTable
you could write the above statement.

Without further information what datacontext.selectTable1() returns
I can't help you.