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windows vs2022 MFC使用webview2嵌入网页

news 来源：原创 2024/9/20 5:34:57

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 WebViewCreateCoreWebView2EnvironmentWithOptions(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 hWndenv->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 settingswil::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 windowRECT bounds;::GetClientRect(hWnd, &bounds);webviewController->put_Bounds(bounds);// Schedule an async task to navigate to Bingwebview->Navigate(L"https://www.bing.com/");// <NavigationEvents>// Step 4 - Navigation events// register an ICoreWebView2NavigationStartingEventHandler to cancel any non-https navigationEventRegistrationToken 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 objectwebview->AddScriptToExecuteOnDocumentCreated(L"Object.freeze(Object);", nullptr);// Schedule an async task to get the document URLwebview->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 contentwebview->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 hostwebview->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());