CODEWITHSUNDEEP
wpfuser-controlswpf-controlstabitem
samar
samar

Reputation: 5211

set header of tabitem based on content in wpf

Initially I thought that it will be a very trivial functionality but now I am not able to implement it.

My requirement is simple. I am programmatically setting the content of a TabItem. The content will be usercontrols. I want to set the text of the header of the TabItem based on the content.

Content doesn’t have a changed event so I am confused as to on which event should I write code.

Also I’m not able to find any style or anything on the net.

Any suggestions? Please help. Thanks in advance.

PS: Please let me know if you need any further information from my side.

Upvotes: 1

Views: 1056

Answers (4)

Bob.
Bob.

Reputation: 4002

TabControl XAML:

<TabControl Name="myTabControl" >
    <TabItem Header="myHeader" Name="myTabItem">
        <my:customUserControl />
    </TabItem>
</TabControl>

Binding the TabItem Header property in code:

// Bind TabItem Header
// Create a binding to a "Header" property in your ViewModel
Binding myBinding = new Binding("Header"); 
// Set the Source of the binding to your ViewModel
myBinding.Source = myViewModel;
// Assign the Binding to your TabItem Header property
myTabItem.SetBinding(Expander.HeaderProperty, myBinding);

Upvotes: 0

samar
samar

Reputation: 5211

I think i got it. Not sure if this is the optimum solution so if anybody has a better solution than this then it will help me a lot.

I made a custom tabitem and overrided OnContentChanged (Didnt knew that there is an overridable OnContentChanged :)). So my code is like below.


    public class TabItemData : TabItem
    {
        protected override void OnContentChanged(object oldContent, object newContent)
        {
            if (newContent.GetType().Name.ToLower().Contains("mycontrolname"))
                this.Header = "control name";
            else
                this.Header = "old name";

            base.OnContentChanged(oldContent, newContent);
        }
    }

Upvotes: 0

Ramin
Ramin

Reputation: 2133

Updated:
You can also use DependencyPropertyDescriptor.AddValueChanged method. see: system.componentmodel.dependencypropertydescriptor.addvaluechanged.aspx

see: wpf-why-is-there-no-isreadonlychanged-event-on-textbox-controls

also see this link: listening-to-dependencyproperty-changes

My old answer:
Create a custom class and handle OnPropertyChanged event. Sth like this: 

public class MyTabItem : TabItem
{
    public MyTabItem() { }
    protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
    {
        base.OnPropertyChanged(e);
        if (e.Property.ToString() == "Content")
        {
            // here you are sure that ContentPropertyhas changed
        }
    }
}

Upvotes: 1

Arsen Mkrtchyan
Arsen Mkrtchyan

Reputation: 50752

If you are using MVVM(or building tabs by assigning TabControl.ItemsSource) it is simple to do, just define an ItemTemplate:

<TabControl.ItemTemplate>
   <DataTemplate>
      <TextBlock Text={Bindin Name}/>
   </DataTemplate>
</TabControl.ItemTemplate>

Upvotes: 1

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