Message Struct

Definition

Implements a Windows message.

Examples

The following code example demonstrates overriding the WndProc method to handle operating system messages identified in the Message. The WM_ACTIVATEAPP operating system message is handled in this example to know when another application is becoming active. For information about the available Message.Msg, Message.LParam, and Message.WParam values, see the MSG Structure documentation. For information about the actual constant values, see Message Constants.

Remarks

The Message structure wraps messages that Windows sends. You can use this structure to wrap a message and assign it to the window procedure to be dispatched. You can also use this structure to get information about a message the system sends to your application or controls. For more information about Windows messages, see Messages and Message Queues.

You cannot create the Message directly. Instead, use the Create method. For the sake of efficiency, the Message uses its pool of existing Messages instead of instantiating a new one, if possible. However, if a Message is not available in the pool, a new one is instantiated.

Properties

Gets or sets the window handle of the message.

Specifies the LParam field of the message.

Gets or sets the ID number for the message.

Specifies the value that is returned to Windows in response to handling the message.

Gets or sets the WParam field of the message.

Methods

Determines whether the specified object is equal to the current object.

Returns the hash code for this instance.

Gets the LParam value and converts the value to an object.

Returns a String that represents the current Message.

Operators

Determines whether two instances of Message are equal.

Determines whether two instances of Message are not equal.

System. Windows. Forms. Integration Пространство имен

Содержит классы, предназначенные для поддержки взаимодействия элементов управления Windows Forms и WPF. Contains classes that support interoperation of Windows Forms and WPF controls.

Классы

Предоставляет данные для событий ChildChanged и ChildChanged . Provides data for the ChildChanged and ChildChanged events.

Элемент управления Windows Forms, который может использоваться для размещения элемента Windows Presentation Foundation (WPF). A Windows Forms control that can be used to host a Windows Presentation Foundation (WPF) element.

Предоставляет базовый класс для классов EventArgs, поддерживающих необязательный выброс исключений. Provides a base class for EventArgs classes which support optionally raising exceptions.

Предоставляет данные для события LayoutError. Provides data for the LayoutError event.

Предоставляет способ преобразования значений свойств между элементами Windows Forms controls и Windows Presentation Foundation (WPF). Provides a way to translate property values between Windows Forms controls and Windows Presentation Foundation (WPF) elements.

Предоставляет данные для события PropertyMappingError. Provides data for the PropertyMappingError event.

Элемент, который позволяет размещать элемент управления Windows Forms на странице WPF. An element that allows you to host a Windows Forms control on a WPF page.

Делегаты

Предоставляет функцию преобразования для сопоставляемого свойства родительского элемента управления. Provides a translation function for a mapped property of the host control.

Комментарии

System.Windows.Forms.IntegrationПространство имен содержит классы, обеспечивающие взаимодействие между Windows Forms и технологиями WPF. The System.Windows.Forms.Integration namespace contains classes that enable interoperation between the Windows Forms and WPF technologies. При использовании System.Windows.Forms.Integration классов можно размещать элементы управления Windows Forms на страницах WPF, а элементы WPF — в приложениях на основе Windows Forms. When you use System.Windows.Forms.Integration classes, you can host Windows Forms controls on WPF pages, and WPF elements in Windows Forms-based applications.

Двумя ключевыми классами, реализующими возможности взаимодействия, являются WindowsFormsHost и ElementHost . The two key classes that implement interoperation capabilities are WindowsFormsHost and ElementHost. Используемый класс зависит от реализации элемента управления: Which class you use depends on your control implementation:

Используйте WindowsFormsHost класс, если необходимо использовать элемент управления Windows Forms на странице WPF. Use the WindowsFormsHost class when you must use a Windows Forms control on a WPF page.

Используйте ElementHost класс, если необходимо использовать элемент WPF в приложении на основе Windows Forms. Use the ElementHost class when you must use a WPF element in a Windows Forms-based application.

Can’t use System.Windows.Forms

I have tried making (my first) a C# program:

This goes well, but if I try using System.Windows.Forms:

This is the error I get:

Some details: — I am using Visual Studio 2012; — I have installed the .NET Development Kit; — It is a Console Application.

Maybe it’s because on a Console Application can’t use System.Windows.Forms? If so, what program should be? I also have tried with a form, but I was only displaying a window and no code.

8 Answers 8

A console application does not automatically add a reference to System.Windows.Forms.dll.

Right-click your project in Solution Explorer and select Add reference. and then find System.Windows.Forms and add it.

You have to add the reference of the namespace : System.Windows.Forms to your project, because for some reason it is not already added, so you can add New Reference from Visual Studio menu.

Right click on «Reference» ▶ «Add New Reference» ▶ «System.Windows.Forms»

To add the reference to «System.Windows.Forms», it seems to be a little different for Visual Studio Community 2017.

1) Go to solution explorer and select references

2) Right-click and select Add references

How to use System.Windows.Forms in .NET Core class library

I’ve created .NET Core class library and try to build it against net40 framework. I want to use Clipboard class from System.Windows.Forms assembly. How can I do this?

My project.json file:

All my net40 specific code is under NET40 define. Any thoughts?

3 Answers 3

What you need is «frameworkAssemblies» , for example:

Working with Clipboard also requires setting the main thread as STA, so don’t forget to add [STAThread] to Main() in your application.

For VS2019 .NET Core 3.1:

1. right-mouse click on the project and select Unload Project
2. right-mouse click on the project and select «Edit foobar.csproj»
3. Example of using WPF and Winforms in .NET Core 3.1: where I added the UseWPF and UseWindowsForms tags. Also I changed Microsoft.NET.Sdk to Microsoft.NET.Sdk.WindowsDesktop to be able to use also wpf.

1. save and right-mouse click on the project again and select Reload Project

Note: the bellow was for .NET Core

Not the answer you’re looking for? Browse other questions tagged .net .net-core project.json or ask your own question.

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Практическое руководство. Связывание элемента управления с типом в Windows Forms How to: Bind a Windows Forms Control to a Type

При создании элементов управления, взаимодействующих с данными, иногда бывает нужно привязать элемент управления к типу, а не к объекту. When you are building controls that interact with data, you will sometimes find it necessary to bind a control to a type, rather than an object. Такая ситуация особенно часто возникает на этапе разработки, когда данные недоступны, но все равно нужно, чтобы элемент управления отображал данные из открытого интерфейса типа. This situation arises especially at design time, when data may not be available, but your data-bound controls still need to display information from a type’s public interface. Например, вы привязываете элемент управления DataGridView к объекту, предоставляемому веб-службой, и хотите, чтобы во время разработки элемент управления DataGridView помечал свои столбцы именами членов пользовательского типа. For example, you may bind a DataGridView control to an object exposed by a Web service and want the DataGridView control to label its columns at design time with the member names of a custom type.

Элемент управления можно легко привязать к типу с помощью компонента BindingSource. You can easily bind a control to a type with the BindingSource component.

Пример Example

В примере кода ниже показано, как привязать элемент управления DataGridView к пользовательскому типу с помощью компонента BindingSource. The following code example demonstrates how to bind a DataGridView control to a custom type by using a BindingSource component. После запуска примера можно увидеть, что DataGridView пометил столбцы, отражающие свойства объекта Customer , перед заполнением элемента управления данными. When you run the example, you’ll notice the DataGridView has labeled columns that reflect the properties of a Customer object, before the control is populated with data. В примере есть кнопка Add Customer (Добавить клиента) для добавления данных в элемент управления DataGridView. The example has an Add Customer button to add data to the DataGridView control. При нажатии на кнопку новый объект Customer добавляется в BindingSource. When you click the button, a new Customer object is added to the BindingSource. В реальном сценарии данные можно было бы получить путем вызова веб-службы или другого источника данных. In a real-world scenario, the data might be obtained by a call to a Web service or other data source.

Компиляция кода Compiling the Code

Для этого примера требуются: This example requires: