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This article mainly introduces how to use regional Region in WPF framework Prism. It is very detailed and has a certain reference value. Friends who are interested must finish reading it!

What is a Region?

Before we understand this, we first need to understand that in the most common development patterns, when we design a page, the interface elements are actually fixed at the time of design.

To take a simple example, when we design the following page, it contains Header, Menu, Content content.

So we can design some elements for this page, such as:

1.Menu can place ListBox

2.Content can place a ContentControl

3.Header can put some ToolBar.

Note: in order to demonstrate the needs, the controls in the corresponding area are demonstrated by TextBlock. In actual development, we often use all kinds of controls.

So, back to the Region theme, in Prism, we can no longer display the content of a page regularly, and this concept becomes the concept of Region division.

The area displayed on the page is divided into N Region, and at this point, each Region becomes a dynamically assigned area. It will be responsible for our UI components or controls.

Define Region

You can use XAML or code to create and define Region

RegionManager.RegionName (XAML)

RegionManager.SetRegionName (Code)

RegionManager function

Maintenance area collection

Provide access to the area

Composite view

Area navigation

Define area

Define Region steps

Region example

When we specify a region name (XAML or code) for the elements of the interface, the next step is to set the corresponding region display content through the IRegionManager interface instance.

In this example, we create three modules and register them in the current page, namely Header, Menu, and Content. As follows:

After running, the interface displays a page with three modules, as follows:

Matters needing attention

Careful netizens may have seen that in the above code, the corresponding area is registered for 3 ContentControl, and then 3 custom controls are displayed.

So, is it possible to register Region on other control elements as well?

Yes, in Prism, controls all support registering Region, but some controls need to implement a RegionAdapters (zone adapter) themselves.

What is RegionAdapters?

Suppose you need to display the view we defined in an area of the application, which actually makes use of RegionAdapter.

This class is responsible for passing the view we defined into the specified Region.

Prism provides many built-in RegionAdapter

ContentControlRegionAdapter

ItemsControlRegionAdapter

SelectorRegionAdapter

-ComboBox

-ListBox

-Ribbon

-TabControl

Note: in addition, if you want to implement the control scope Region, you must create your own custom Region, because if you don't, an exception will be thrown.

Create Custom RegionAdapter

First, we create a class here, then inherit it from RegionAdapterBase, and then we create a custom adapter based on StackPanel.

Next, we need to override the CreateRegion method.

The CreateRegion method returns an IRegion interface, where we can create zone types based on the following three types.

SingleActiveRegion

AllActiveRegion

Region

Then, you need to override the Adapt method in it.

Finally, we need to register the custom adapter we created in PrismApplication, as shown below.

The above is all the content of the article "how to use Regional Region in WPF Framework Prism". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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