The softwaredefined data center SDDC and new trends in cloud and virtualization bring increased agility, automation, and intelligent services and management to all. To apply the same property settings to multiple TreeView controls, use the Style property. You can modify the default ControlTemplate to give the control a unique. Code editor. Expand your Mobirise Mobile Web Builder into a fullscale HTML editor with the Code Editor extension. With it, you gain control of all the snippets of. Tree. View. Item Use Control. Template and Hierarchical. Data. Template together. Im using Hierarchical. Data. Template in my Tree. View, and I wanted to also overwrite the default template for the Tree. Home of the Microsoft ASP. NET development community. Download Visual Studio, post to the forums, read ASP. NET blogs and learn about ASP. NET. View. Item so that when an item is selected, it only highlights the text, not including the icon next to it. Tree. View. Item. Template. Hierarchical. Data. Template Items. SourceBinding Children. In L is for Lookless, I introduce WPFs lookless control model and examine what it means to style and template a control in WPF. I also talk about the. Windows Presentation Foundation WPF data binding provides a simple and consistent way for applications to present and interact with data. Elements can be bound to. This is a Codeguru directory of articles on the C topic of Visual C C. MSDN Magazine Issues and Downloads. Read the magazine online, download a formatted digital version of each issue, or grab sample code and apps. Tree. View. Item StyleStatic. Resource Tree. View. Item. Style HeaderBinding Display. Text. lt Hierarchical. Data. Template. Tree. View. Item. Template. Tree. View. Resources. Style x KeyTree. View. Item. Focus. Visual. Setter PropertyControl. Template. lt Setter. Value. lt Control. Template. lt Rectangle. Control. Template. Setter. Value. Setter. Style. Style x KeyExpand. Collapse. Toggle. Style Target. Typex Type Toggle. Button. lt Setter PropertyFocusable ValueFalse. Setter PropertyWidth Value1. Setter PropertyHeight Value1. Setter PropertyTemplate. Setter. Value. Control. Template Target. Typex Type Toggle. Button. lt Border Width1. Height1. 3 BackgroundTransparent. Border Width9 Height9 Snaps. To. Device. Pixelstrue Border. BrushFF7. 89. 8B5 Border. Thickness1 Corner. Radius1. lt Border. Background. lt Linear. Gradient. Brush End. Point1,1 Start. Point0,0. Gradient. Stop ColorWhite Offset. Gradient. Stop ColorFFC0. B7. A6 Offset1. Linear. Gradient. Brush. lt Border. Background. lt Path x NameExpand. Path FillBlack Margin1,1,1,1 DataM 0 2 L 0 3 L 2 3 L 2 5 L 3 5 L 3 3 L 5 3 L 5 2 L 3 2 L 3 0 L 2 0 L 2 2 Z. Border. lt Border. Control. Template. Triggers. lt Trigger PropertyIs. Checked ValueTrue. Setter PropertyData Target. NameExpand. Path ValueM 0 2 L 0 3 L 5 3 L 5 2 Z. Trigger. lt Control. Template. Triggers. Control. Template. Setter. Value. Setter. Style. Style x Keyx Type Tree. View. Item Target. Typex Type Tree. View. Item. lt Setter PropertyBackground ValueTransparent. Setter PropertyHorizontal. Content. Alignment ValueBinding Horizontal. Content. Alignment, Relative. SourceRelative. Source Ancestor. Typex Type Items. Control. lt Setter PropertyVertical. Content. Alignment ValueBinding Vertical. Content. Alignment, Relative. SourceRelative. Source Ancestor. Typex Type Items. Control. lt Setter PropertyPadding Value1,0,0,0. Setter PropertyForeground ValueDynamic. Resource x Static System. Colors. Control. Text. Brush. Key. Setter PropertyFocus. Visual. Style ValueStatic. Resource Tree. View. Item. Focus. Visual. Setter PropertyTemplate. Setter. Value. Control. Template Target. Typex Type Tree. View. Item. lt Grid. Grid. Column. Definitions. Column. Definition WidthAuto. Column. Definition WidthAuto. Column. Definition Width. Grid. Column. Definitions. Grid. Row. Definitions. Row. Definition HeightAuto. Row. Definition. Grid. Row. Definitions. Toggle. Button x NameExpander StyleStatic. Resource Expand. Collapse. Toggle. Style Click. ModePress Is. CheckedBinding Is. Expanded, Relative. SourceRelative. Source Templated. Parent. lt Stack. Panel OrientationHorizontal Grid. Column1. lt Image Width1. Height1. 6 Margin3,0 SourceBinding PathImage. Source. lt Border x NameBd Snaps. To. Device. Pixelstrue BackgroundTemplate. Binding Background Border. BrushTemplate. Binding Border. Brush Border. ThicknessTemplate. Binding Border. Thickness Margin0 Padding0. Content. Presenter x NamePARTHeader Horizontal. AlignmentTemplate. Binding Horizontal. Content. Alignment Snaps. To. Device. PixelsTemplate. Binding Snaps. To. Device. Pixels Content. SourceHeader. Border. Stack. Panel. lt Items. Presenter x NameItems. Host Grid. Column1 Grid. Column. Span2 Grid. Row1. lt Grid. Control. Template. Triggers. Trigger PropertyIs. Expanded Valuefalse. Setter PropertyVisibility Target. NameItems. Host ValueCollapsed. Trigger. lt Trigger PropertyHas. Items Valuefalse. Setter PropertyVisibility Target. NameExpander ValueHidden. Trigger. lt Trigger PropertyIs. Selected Valuetrue. Setter PropertyBackground Target. NameBd ValueDynamic. Resource x Static System. Colors. Highlight. Brush. Key. Setter PropertyControl. Foreground Target. NameBd ValueDynamic. Resource x Static System. Colors. Highlight. Text. Brush. Key. Trigger. lt Multi. Trigger. lt Multi. Trigger. Conditions. Condition PropertyIs. Selected Valuetrue. Condition PropertyIs. Selection. Active Valuefalse. Multi. Trigger. Conditions. Setter PropertyBackground Target. NameBd ValueDynamic. Resource x Static System. Colors. Control. Brush. Key. lt Setter PropertyControl. Foreground Target. NameBd ValueDynamic. Resource x Static System. Colors. Control. Text. Brush. Key. Multi. Trigger. Trigger PropertyIs. Enabled Valuefalse. Setter PropertyForeground ValueDynamic. Resource x Static System. Colors. Gray. Text. Brush. Key. Trigger. Control. Template. Triggers. Control. Template. Setter. Value. Setter. lt Style. Triggers. lt Trigger PropertyVirtualizing. Stack. Panel. Is. Virtualizing Valuetrue. Setter PropertyItems. Panel. lt Setter. Value. lt Items. Panel. Template. Virtualizing. Stack. Panel. lt Items. Panel. Template. Setter. Value. Setter. lt Trigger. Style. Triggers. Style. Tree. View. Resources. I couldnt find a way to use both the Hierarchical. Data. Template and Control. Template together so I can specify the Items. Source and also change parts of the controls behavior. When I do the above code, it wont select the treeviewitem at all. Dr. WPFAs we continue our series on Items. Control, it probably makes sense to take a small detour and look at WPF controls in general. In this post, we will examine how WPF controls get their visual representation through styles and templates. Then we will look at how these techniques specifically apply to several Items. Control classes. This article is fairly long and covers a lot of really important information, including the following It is definitely worth taking your time to understand these concepts. Feel free to break the article up into more manageable pieces if you are time constrained. I would also encourage you to keep kaxaml up and running as you learn about styles and templates. I think youll find that it makes the content more meaningful when you directly interact with the samples. As such, this article contains a lot of kaxamples, which is my term for kaxaml ready samples. When you see the kaxaml symbol, you know you can cut and paste the included markup snippet directly into kaxaml to interact with it live. Then you are free to tweak the markup and make a few cool new styles and templates of your own The Lookless Control Model. When developers first start learning WPF, they are often very surprised to learn that a WPF control does not include a hardcoded visual representation. Rather, the default visual representation is specified in XAML in a completely separate theme assembly from the class that implements the controls logic. This separation of code based logic from visual representation the controls look and feel is what makes the WPF control model so powerful. We refer to this approach as a lookless control model. Why, you may be asking, is such a model better than the traditional approach of defining the visuals as part of the control Ill give you two big reasons design and reusability. If youve studied WPF or Silverlight much, you have certainly heard about the new developerdesigner workflow that these technologies enable. Namely, developers and designers can work side by side to simultaneously create powerful and visually stunning applications, with each person doing what they do best. A developer can implement an applications logic at the same time that a designer creates the applications look and feel. To a great degree, it is the lookless control model that enables this new workflow. It turns out that left brained developers dont always come up with the most eye pleasing visual designs, as can be seen by looking at the battleship gray user interfaces coming out of the Windows Forms world for the past decade. Now contrast these apps with the vibrant Flash based web applications created in the same timeframe. The big difference is that most of the cool Flash applications were created by right brained designers who take aesthetics very seriously. Yes, Im stereotyping with the whole left brainedright brained thing some stereotypes are just true. By introducing a lookless control model where the visual representation of the control is specified apart from the controls code, we are able to put the visual design into the hands of a qualified UX designer, where it belongs. The second big reason for separating a controls visuals from its code implementation is reusability. In the past, if you wanted to have two buttons with different visual appearances, you had to create two separate button classes with the correct rendering code baked into each class. Both classes contained the same basic button logic. They both provided a click event in response to the appropriate mouse or keyboard user interactions. The only difference between the button classes was in the rendering logic. By moving the visual representation into XAML and out of the control class, we allow a single Button class to be reused wherever we need to support a Click interaction. The button can have whatever visual representation the designer wants to create. The developer no longer needs to be involved in the process of redefining a buttons visual representation. An example of this reusability can be seen in the following image borrowed from my Observable Dictionary Sample depicting a List. View in which each row contains a style name and a button. The only difference between each button is the Style used to define the buttons look and feel. Introduction to Styles. We have already seen an example of how one might style and template an item container via the Item. Container. Style property see I is for Item Container. Now its time to actually dig into the nitty gritty details of control styling and templating. If you are already familiar with styling and templating, you can skip ahead to the section entitled Templating an Items Control. Of course, you might consider continuing on through the following sections as a refresher course and its possible you might even learn something new. PA WPF style consists of a collection of property values that are applied to a framework element either explicitly by setting its Style property or implicitly based on a resource lookup using the elements default style key. These property values are applied using Setter objects. Thus, a style can be thought of as a collection of Setter objects. Here is a very simple example lt Style. Target. Typex Type. Rectangle. lt Setter. PropertyWidth Value5. Setter. PropertyHeight Value5. Style In this case, a style is created for a Rectangle. There are two setters in the style. These set the Width and Height properties of the Rectangle to 5. So how do you actually use the style Typically, you will give it a resource key and add it to a resource dictionary somewhere in your element hierarchy. Then you can use the resource key to apply the style to specific elements in the subtree. Here is a kaxample lt Gridxmlnshttp schemas. Grid. Resources. Stylex KeyMy. Rectangle. Style. Target. Typex Type. Rectangle. lt Setter. PropertyWidth Value5. Setter. PropertyHeight Value5. Style. lt Grid. Resources. Stack. Panel. OrientationHorizontal. Rectangle. StyleStatic. Resource. My. Rectangle. Style FillRed. Rectangle. StyleStatic. Resource. My. Rectangle. Style FillGreen. Rectangle. StyleStatic. Resource. My. Rectangle. Style FillBlue. Rectangle. StyleStatic. Resource. My. Rectangle. Style FillBlack. Stack. Panel. lt Grid In the above example, the style is explicitly applied to each Rectangle because we have set the Style property on the Rectangle elements. If we want the style to be applied implicitly to every Rectangle in the subtree, we can simply remove the x Key attribute from the style declaration and then not specify the Style property on the Rectangle elements, as shown in this kaxample lt Gridxmlnshttp schemas. Grid. Resources. Style. Target. Typex Type. Rectangle. lt Setter. PropertyWidth Value5. Setter. PropertyHeight Value5. Style. lt Grid. Resources. Ford Focus Stereo Wiring Manual For Mth more. Stack. Panel. OrientationHorizontal. Rectangle. FillRed. Rectangle. FillGreen. Rectangle. FillBlue. Rectangle. FillBlack. Stack. Panel. lt Grid You may be curious as to why the above style is applied to all Rectangle elements in the subtree. The answer is hidden in the frameworks parsing routine for resource dictionaries. Each element added to a resource dictionary must have a key. It is noteworthy that the style above is conspicuously missing an x Key attribute.