Microsoft Edge WebView2 控件允许在本机应用中嵌入 web 技术(HTML、CSS 以及 JavaScript)。 WebView2 控件使用 Microsoft Edge 作为绘制引擎,以在本机应用中显示 web 内容。
一、通过菜单“项目”-“管理NuGet程序包”,下载相关包
二、安装 Microsoft.Web.WebView2
在“浏览”分页的左上角的搜索栏中,键入 Microsoft.Web.WebView2,选择对应的版本,然后点击按钮安装
三、安装Microsoft.Windows.ImplementationLibrary
在“浏览”分页的左上角的搜索栏中,键入 Microsoft.Windows.ImplementationLibrary,选择对应的版本,然后点击按钮安装
四、添加界面消息映射
在对话框界面右击,选择“类向导”
添加WM_CREATE和WM_SIZE消息:
五、添加代码
在MFCApplication1Dlg.h头文件中添加:
#include <iostream>
#include <wrl.h>
#include <wil/com.h>
#include "WebView2.h"
#include <string>
#include <vector>
using namespace std;
using namespace Microsoft::WRL;
// Pointer to WebViewController
static wil::com_ptr<ICoreWebView2Controller> webviewController = nullptr;
// Pointer to WebView window
static wil::com_ptr<ICoreWebView2> webview = nullptr;
在构造函数中添加:
CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
在析构函数中添加:
CoUninitialize();
在OnSize函数中添加:
if (webviewController != nullptr) {
RECT bounds;
GetClientRect(&bounds);
webviewController->put_Bounds(bounds);
};
在OnCreate函数中添加:
HWND hWnd = this->m_hWnd;
// TODO: 在此添加您专用的创建代码
// <-- WebView2 sample code starts here -->
// Step 3 - Create a single WebView within the parent window
// Locate the browser and set up the environment for WebView
CreateCoreWebView2EnvironmentWithOptions(nullptr, nullptr, nullptr,
Callback<ICoreWebView2CreateCoreWebView2EnvironmentCompletedHandler>(
[hWnd](HRESULT result, ICoreWebView2Environment* env) -> HRESULT {
// Create a CoreWebView2Controller and get the associated CoreWebView2 whose parent is the main window hWnd
env->CreateCoreWebView2Controller(hWnd, Callback<ICoreWebView2CreateCoreWebView2ControllerCompletedHandler>(
[hWnd](HRESULT result, ICoreWebView2Controller* controller) -> HRESULT {
if (controller != nullptr) {
webviewController = controller;
webviewController->get_CoreWebView2(&webview);
}
// Add a few settings for the webview
// The demo step is redundant since the values are the default settings
wil::com_ptr<ICoreWebView2Settings> settings;
webview->get_Settings(&settings);
settings->put_IsScriptEnabled(TRUE);
settings->put_AreDefaultScriptDialogsEnabled(TRUE);
settings->put_IsWebMessageEnabled(TRUE);
// Resize WebView to fit the bounds of the parent window
RECT bounds;
::GetClientRect(hWnd, &bounds);
webviewController->put_Bounds(bounds);
// Schedule an async task to navigate to Bing
webview->Navigate(L"https://www.bing.com/");
// <NavigationEvents>
// Step 4 - Navigation events
// register an ICoreWebView2NavigationStartingEventHandler to cancel any non-https navigation
EventRegistrationToken token;
webview->add_NavigationStarting(Callback<ICoreWebView2NavigationStartingEventHandler>(
[](ICoreWebView2* webview, ICoreWebView2NavigationStartingEventArgs* args) -> HRESULT {
wil::unique_cotaskmem_string uri;
args->get_Uri(&uri);
std::wstring source(uri.get());
if (source.substr(0, 5) != L"https") {
args->put_Cancel(true);
}
return S_OK;
}).Get(), &token);
// </NavigationEvents>
// <Scripting>
// Step 5 - Scripting
// Schedule an async task to add initialization script that freezes the Object object
webview->AddScriptToExecuteOnDocumentCreated(L"Object.freeze(Object);", nullptr);
// Schedule an async task to get the document URL
webview->ExecuteScript(L"window.document.URL;", Callback<ICoreWebView2ExecuteScriptCompletedHandler>(
[](HRESULT errorCode, LPCWSTR resultObjectAsJson) -> HRESULT {
LPCWSTR URL = resultObjectAsJson;
//doSomethingWithURL(URL);
return S_OK;
}).Get());
// </Scripting>
// <CommunicationHostWeb>
// Step 6 - Communication between host and web content
// Set an event handler for the host to return received message back to the web content
webview->add_WebMessageReceived(Callback<ICoreWebView2WebMessageReceivedEventHandler>(
[](ICoreWebView2* webview, ICoreWebView2WebMessageReceivedEventArgs* args) -> HRESULT {
wil::unique_cotaskmem_string message;
args->TryGetWebMessageAsString(&message);
// processMessage(&message);
webview->PostWebMessageAsString(message.get());
return S_OK;
}).Get(), &token);
// Schedule an async task to add initialization script that
// 1) Add an listener to print message from the host
// 2) Post document URL to the host
webview->AddScriptToExecuteOnDocumentCreated(
L"window.chrome.webview.addEventListener(\'message\', event => alert(event.data));" \
L"window.chrome.webview.postMessage(window.document.URL);",
nullptr);
// </CommunicationHostWeb>
return S_OK;
}).Get());
return S_OK;
}).Get());
六、截图
头文件:
构造函数和析构函数:
OnSize函数:
OnCreate函数:
运行截图:
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