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見直しキャンペーン中
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`target="_blank"`でも無視して遷移します。
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`teratail`が入っていないURLは規定ブラウザで開きます。
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<a href="/
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<a href="http://leverages.jp/
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using Microsoft.Web.WebView2.
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using
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using System
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using System.
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using System.
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webView2.
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}
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`target="_blank"`でも無視して遷移します。
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`teratail`が入っていないURLは、規定ブラウザで開きます。
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フッターにある↓が確認にいいでしょう。
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```html
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<a href="http://blog.teratail.com/" target="_blank">公式ブログ</a>
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<a href="/report" target="_blank">teratail Report</a>
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<a href="http://leverages.jp/" target="_blank">運営会社</a>
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<a href="http://leverages.jp/privacypolicy/" target="_blank">個人情報保護方針</a>
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```
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```cs
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using Microsoft.Web.WebView2.Core;
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using Microsoft.Web.WebView2.WinForms;
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using System;
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using System.Diagnostics;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace Questions320460
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{
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public partial class Form1 : Form
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{
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private WebView2 webView2;
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public Form1()
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{
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InitializeComponent();
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webView2 = new WebView2
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{
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Source = new Uri("https://teratail.com/questions/320460"),
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Dock = DockStyle.Fill,
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};
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webView2.NavigationStarting += WebView2_NavigationStarting;
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Controls.Add(webView2);
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_ = InitializeAsync();
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}
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private async Task InitializeAsync()
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{
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await webView2.EnsureCoreWebView2Async(null); // CoreWebView2初期化待ち
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webView2.CoreWebView2.NewWindowRequested += CoreWebView2_NewWindowRequested;
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}
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private void WebView2_NavigationStarting(object sender, CoreWebView2NavigationStartingEventArgs e)
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{
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if (!e.Uri.Contains("teratail"))
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{
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e.Cancel = true; // Navigationのキャンセル
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Process.Start(e.Uri);
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return;
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}
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}
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private void CoreWebView2_NewWindowRequested(object sender, CoreWebView2NewWindowRequestedEventArgs e)
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{
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e.Handled = true; // NewWindowのキャンセル
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if (!e.Uri.Contains("teratail"))
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{
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Process.Start(e.Uri);
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return;
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}
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webView2.CoreWebView2.Navigate(e.Uri); // 既存WebView2で遷移
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}
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}
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}
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```
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