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Thanks but you could always consider posting this blog under the original question rather than here.
This isn't a question.
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I doubt he is the author of the blog, so sharing in this manner is excellent, he got my 5
Never underestimate the power of human stupidity
RAH
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I am facing problems with binding itemscontrol to a list of values. Below is my code in details:
Model code:
public class Employee
{
public string Name { get; set; }
public string Salary { get; set; }
}
public class Department
{
public string DepartmentName { get; set; }
public List<Employee> EmployeeDetails { get; set; }
}
View Model Code:
public ObservableCollection<Department> Departments { get; set; }
Departments = new ObservableCollection<Department>();
Departments.Add(new Department {DepartmentName = "TECH", EmployeeDetails = new List<Employee> {new Employee {Name = "XYZ", Salary = "10000.00" }}});
XAML:
<ItemsControl ItemsSource="{Binding Departments}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Expander Header="{Binding Path=DepartmentName}" Margin="12,12,12,0" VerticalAlignment="Top">
<Border BorderBrush="Black" BorderThickness="1" x:Name="border1">
<Grid Height="50">
<Grid.RowDefinitions>
<RowDefinition Height="25" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" HorizontalAlignment="Center" VerticalAlignment="Center" Text="{Binding EmployeeDetails.Name}" TextWrapping="Wrap" FontSize="10"/>
<TextBlock Grid.Column="1" HorizontalAlignment="Center" VerticalAlignment="Center" Text="{Binding EmployeeDetails.Salary}" TextWrapping="Wrap" FontSize="10"/>
</Grid>
</Border>
</Expander>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
The data is not displaying with the code.
If the Department class is as below
public class Department
{
public string DepartmentName { get; set; }
public Employee EmployeeDetails { get; set; }
}
Then it works fine. But I need Department class should be as
public class Department
{
public string DepartmentName { get; set; }
public List<Employee> EmployeeDetails { get; set; }
}
And with this the data is not displaying. Please help me out.
Thanks in Advance,
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You are going to have to put EmployeeDetails in another items container, as the way you have it now, it is not binding to the collection. So, instead of
<Grid Height="50">
<Grid.RowDefinitions>
<RowDefinition Height="25" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" HorizontalAlignment="Center"
VerticalAlignment="Center" Text="{Binding EmployeeDetails.Name}"
TextWrapping="Wrap" FontSize="10"/>
<TextBlock Grid.Column="1" HorizontalAlignment="Center"
VerticalAlignment="Center" Text="{Binding EmployeeDetails.Salary}"
TextWrapping="Wrap" FontSize="10"/>
</Grid>
you should have something like this
<ItemsControl ItemsSource="{Binding Path=EmployeeDetails}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" HorizontalAlignment="Center"
VerticalAlignment="Center" Text="{Binding Name}"
TextWrapping="Wrap" FontSize="10" Margin="5"/>
<TextBlock Grid.Column="1" HorizontalAlignment="Center"
VerticalAlignment="Center" Text="{Binding Salary}"
TextWrapping="Wrap" FontSize="10" Margin="5" />
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman
modified 31-Jan-12 6:23am.
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Thanks Eric Allman.
It works now.
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Glad to help. My Name is Wayne Gaylard - Eric Allman is an author I quote in my signature.
When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman
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Thanks
When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman
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hi everyone,
Can anybody give me a solution for focusing on an element in a view from ViewModel by binding?????
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You might want to look at the solution provided by Anvaka here[^].
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It is a good post. The only thing for the OP to be aware of though is that focus in WPF is a tricksy thing. Sometimes what you think you are focusing on isn't what ends up focused.
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Good link! 
When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman
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I thought of writing one myself for the OP, then found this sample. There wasn't a lot I could have done to improve on it, so I thought I'd leave it alone.
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My current project has problems in the login dialogue, focusing on the first text box when it opens - I shall be busy tomorrow morning implementing this to see if it works - again good find - and timing was excellent.
When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman
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Hmm... was kind of envisioning something along the lines of a bindable version of FocusManager.FocusedElement / ElementName binding, but that would mean the VM would be tightly coupled to view control names  . Not too big on having to put an attached property on x controls that I might want to set focus to (and having x public bool properties to boot). Not too sure the VM should be the one deciding focus anyways. Seems like a job for the view. I'm thinking 99% of cases can be handled in XAML with triggers  .
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Do you mean "event" as in raising a real event? If so, the VM raising events to the V is kinda backwards  and not really much different then just exposing public properties in the VM that the V binds to.
On the drive in to work, I thought about this more... I'm now thinking something along the lines of following the .NET control model. I think using the built in VisualStateManager could possibly work. I haven't tried it, so it may be dependent on something  , if so, something very similiar to it. This way, you can handle a bunch of different states (in the XAML) with a single object.
Kinda all the same... 50 public bools vs. 50 events vs. a visual state manager. I'd definitely go with some design that can do multiple things off of one property / event / whatever.
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Wait, I kind of read your response as "I'm going to raise Event1" to signal that something should happen in the view. How are you going to tell the view through Event1 to set focus to 1 of 50 controls? Aren't you going to need one event for every state? What I mean is, are you defining a custom eventargs that contains which control to set focus to? The OP poster wanted to set focus from the VM to any one of those 50 controls.
Where I was headed with the VSM is that they already have a method for "switching" in the XAML based on the state. No code behind.
I think we are both trying to say the same thing in different ways LOL, that you should be able to do different things through a single property, DP, whatever.
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Gotcha.
OP sounded like he wanted to randomly set focus to random controls at random times. Otherwise, why would you need a bindable solution?
'50' as in the sense of multiple controls. If I have a dialog with 3 edit boxes, I thought OP wanted to be able to set focus to any of the 3 edit boxes.
If you wanted to do that, you'd either need a custom eventargs to pass a param, or some other object like VSM.
If you are trying to accomplish something like "hey! you were a douche and you put 24 in an edit box that only allows 50 -> 100, so I'm going to focus the edit box for you!" then I wouldn't use any of these solutions and would do it with validation templates.
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this solution is for frameworkelements but i want to focus on a gridviewcolumn....
is there any solution?????
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gridviewcolumn? as in the standard WPF ListView's GridViewColumn? The GridViewColumnHeader is actually the FrameworkElement, but thats not a focusable control anyways.
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not listview's,i mean gridview's GridViewColumn...
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Would anyone like to chime in on the Comments and Discussions section over here?
WPF Dialog Service via Binding[^]
I'm the author and I strongly disagree with the "vote of 2".
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As I already told you, your technique does not allow for testing the VM. When you hit a block of code in the VM that triggers your MessageBoxHelper.Message property, you display a blocking modal message box that requires somebody sitting at the keyboard to dismiss it. You provide no means to prevent that from happening during testing. Using the ServiceLocator pattern, that functionality is provided. The whole point of the service is to allow for testability. In your application, you register the real IDialogService or whatever, but during automated tests, you register a stubbed out IDummyDialogService. This allows you to substitute a non blocking service.
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How does my technique not allow for testing the VM? While running unit testing there would be no actual blocking model dialog box displayed. As I already told you, my approach is better precisely because no stub is required.
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How do you know when unit testing is going on? I see absolutely nothing in the code that prevents the dialog box from being shown.
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