Mar 28, 2010 i recently needed to style a wpf expander control for a prototype project. Wpf bind commands on expander events, expander is defined. Mar 28, 2010 styling a wpf expander control is easy, once you understand data templates. For more information, see create a template for a control expander parts. If you need to change only the icon that is used to expand an item, you can use the expanderstyle property of the radtreeview. You can modify the default controltemplate to give the control a unique appearance. Apr 28, 2020 download a precompiled demo from the releases page.
And here we take a textblock to show the content and set its textwrapping property. Styling a wpf expander control is easy, once you understand data templates. The wpf expander represents a control with an expanded view where the contents of the expanded area can be. It allows its children to be hidden or displayed with a single click. Inside the togglebutton s template, we will use wpf shapes to draw our icon and another contentpresenter to be the header, which are then laid out using a grid. The icon is a togglebutton, so any style that can be applied to a togglebutton can be applied to the icon too this tutorial will walk you through the common task of styling an. The default wpf expander is functional but is ugly. The twelfth part of the windows presentation foundation fundamentals tutorial continues the examination of the wpf layout controls. In this wpf video, the developer, will demonstrate and talk about the various problems, encountered while styling the expander control in wpf. This is probably the third time ive needed to do this and each time looking at pages and pages of all that style code.
This book explains how wpf works from the ground up. Jan 11, 2017 in this wpf video, the developer, will demonstrate and talk about the various problems, encountered while styling the expander control in wpf. Aug 21, 2012 wpf expander example with style for header. The property is an enumeration of type clickmode that exposes the following. Wpf is a native xamlbased reporting component designed to view reports created in sharpshooter reports in windows presentation foundation applications. Expander allows you to hide or show any content that is inside of it. This article describes how to control the mouse action that triggers an expand. In this lecture ill reveal the list of topics you are going to learn.
It derives from headeredcontentcontrol so it has a header property to set the header content, and a content property for the expandable content it has a isexpanded property to get and set if the expander is in expanded or. Heres a contrived example to demonstrate the problem and the solution. Rapidly develop enterpriseclass line of business applications with a comprehensive set of features like controls, data. To prevent this, set the lastchildfill property on the dockpanel to false, or make sure that the expander is not the last element in a dockpanel. So to solve this problem you can animate the expand collapse events that get fired to smoothly open and close. Our teams ux designer came up with a nice visual design. I hope you will get amazed by the possibilities of this fascinating technology. Jan 20, 2017 how to use the expander control element in wpf. Although i can change the control template to give a new look and feel, i thought it will be quicker to create a custom one.
Sep 08, 20 the first step is to create a controltemplate for the togglebutton expander s button. Wpf treeview styling the expander telerik ui for wpf. This powerful report tool is able to create reports of any complexity including group, cross tab, subreport, table reports from multiple. It is a powerful framework for building windows applications. Apr 04, 2011 for todays wpf tutorial we are going to be talking about the expander control in wpf. Creating expander control xaml expander can be created by using expander element.
Jul 20, 2015 wpf, how to, help, visual basic, tutorial, article if you have limited screen space and a lot of content to display about one particular thing, then the wpf expander might be just what you need. The code examples in this tutorial demonstrate how to use an expander control in a wpf app. For todays wpf tutorial we are going to be talking about the expander control in wpf. An expander control provides a way to provide content in an expandable area that resembles a window and includes a header creating a simple expander. It has a isexpanded property to get and set if the expander is in the expanded or collapsed state.
When an expander control is the last element in a dockpanel, the expander is sized to fill the remaining area of the dockpanel. Now letas come back to this article, expander control is used to wrap or expand the content of items. Jan 28, 20 nextwave software wpf suite with wpf chart and gauge is a component suite that helps you to visualize your data in windows presentation foundation applications. Download the source and run the demo more information. With only a little more effort the controls entire visual tree can be replaced using templates without affecting the underlying behavior of the control itself. The property is an enumeration of type clickmode that exposes the following members. I modified the header attribute of the expander element. To prevent this default behavior, set the lastchildfill property on the dockpanel object to false, or make sure that the expander is not the last element in a. This code builds with the release candidate version of visual studio 2010.
This topic describes the styles and templates for the expander control. Wpf expander how to change the action trigering an. To easily customize the appearance of the expander control, you can set expander properties such as. If you have a lot of content to display when an expander is expanded and you want to delay loading of the content until the user actually opens the expander, you can use the expanders expanded event. This property is an enumeration which exposes four values. Wpf, how to, help, visual basic, tutorial, article if you have limited screen space and a lot of content to display about one particular thing, then the wpf expander might be just what you need. This allows you to host rich content inside your expander, from text and images to a listview or any other wpf control. Header expander now we write the code for the content part of the expander control. In the expanded state, it takes the size of header and content together. Dec 18, 2008 restyling the wpf expander control published december 18, 2008 wpf, xaml 3 comments with minimal effort any of the supplied windows presentation foundation wpf controls can be visually restyled to suit an applications needs. Expander borderbrushdarkgray margin0,5 headerexpand to see something.
The expander control is like a groupbox but with the additional feature to collapse and expand its content. At designtime, the expander element of xaml is used to create an expander control. Today ill show you how to use expander with datagrid and how to apply a style to expander s header. They are using it for all kind of selections like color, fonttype or fontsize. Wpf bind commands on expander events, expander is defined in. It derives from headeredcontentcontrol so it has a header property to set the header content, and a content property for the expandable content it has a isexpanded property to get and set if the expander is in expanded or collapsed state. The expander by default displays only its header content. So, i began to build my prototype and match his visual style mocked up in visio in wpf. I would like to have something like a resizable expander. The expander defines the isexpanded property and expandedcollapsed events. Wpf bind commands on expander events, expander is defined in controltemplate for groupitem gist. Wpf only want one expander open at a time in grouped listbox. This would usually be a piece of text, but thanks to the flexibility of wpf, it can be used for any type of mixed content like texts, images and even other wpf controls. It follows on from the author s previous and highly successful books, covering windows forms wpfs predecessor technology and earlier versions of wpf.
A simple expander with a title and a few lines of text contained. Windows presentation foundation wpf is the codename of the presentation userinterfaces sub system in windows vista programming model and is used to create user interfaces. The tutorials will show you how to create the next generation user experience. To load the source project you will need visual studio 2019. Wpf expander how to change the action trigering an expand. The radexpander control exposes a clickmode property to allow you to determine when the content of the control should be expanded. Next, we can add elements inside the expanderthese will be hidden or shown by the expander arrow. Expander control in wpf part 1 of 2 videos youtube. I recently found myself wishing the the toggle button on the.
Wpf expander headertemplates dont forget the binding. Or is there another way to make the expander resizable. This example creates an expander that looks like the previous illustration. In the example below, we use an image for the header of the expander and then a groupbox for its content. Change value of all textboxes nested inside expanders in a stackpanel. Every time i customize an expander in wpf using a headertemplate, i make a critical mistake. Windows presentation foundation wpf and xaml combine into a rich presentation system for building windows desktop applications with visually stunning user experiences that incorporate ui, media, and complex business models. Your contribution will go a long way in helping us serve.
Welcome to the course learn enterpeise wpf with xaml from scratch. It was not in the expander but in a parent control of the expander. Combine expander and grid resizable expander ask question asked 9 years ago. Stack overflow for teams is a private, secure spot for you and your coworkers to find and share information. Notice that when you use an expander and expand collapse it that there is a jerkiness depending on the number of elements that you have in it. The expander here shows a description when it is clicked.
At designtime, the element of xaml is used to create an expander control. The expander control will provide you with the ability to hideshow a piece of content. For more information, see create a template for a control. It derives from headeredcontentcontrol so it has a header property to set the header content, and a content property for the expandable content. This post shows you how to use a control template, styles and a data templates to fully control the appearance of the header in a wpf expander control. It follows on from the author s previous and highly successful books, covering windows forms wpf s predecessor technology and earlier versions of wpf. With minimal effort any of the supplied windows presentation foundation wpf controls can be visually restyled to suit an applications needs. When an expander control is the last element in a dockpanel, windows presentation foundation wpf automatically sets the expander dimensions to equal the remaining area of the dockpanel.
If you wish to further customize the expander control, you can apply a custom controltemplate. The expanddirection property gets or sets the direction in which the content would expand. If you have a lot of content to display when an expander is expanded and you want to delay loading of the content until the user actually opens the expander, you can use the expander s expanded event. The suite contains more than 40 2d3d charts, such as area, bar, column, line, pie, doughnut, pyramid, funnel, scatter, bubble, stock bars, candlesticks and radar charts and circular gauge, linear gauge, digital labels, analog rolling. Github materialdesigninxamlmaterialdesigninxamltoolkit.
Sep 30, 20 the header property of an expander control doesnt have to be a string. Customizing wpf expander with controltemplate codeproject. This is probably the third time ive needed to do this and each time looking at pages and pages of all that style code leaves me queasy. The following example shows how to create a simple expander control. Download a precompiled demo from the releases page. It does not have a style, only the itemspanel has a template. In the example below, the expander contains a textblock, which we only load in the handler for the expanded event. Mar 04, 2012 every time i customize an expander in wpf using a headertemplate, i make a critical mistake. Welcome to my website about the windows presentation foundation. It enables you to control the direction to which the expansion happens with an expanddirection property. You can set it to any object and that object will be displayed at the top of the expander, whether the expander is collapsed or expanded.
In collapsed state, the expander takes only the space needed by the header. Net programming modern flat gradient side menu tabs with bunifu ui 1. Background, foreground, padding, borderbrush, and borderthickness. Below you will find a sample style and controltemplate for the expander control. This tutorial explains the features that you need to understand to build wpf applications and how it brings a fundamental change in windows applications. Please drag an expander control to your wpf window.
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