使用WinForms的WebView2控件以编程方式指定不同文件类型的下载位置

using Microsoft.Web.WebView2.Core;
using Microsoft.Web.WebView2.WinForms;

// 在窗体的构造函数或加载事件中进行初始化
private async void Form1_Load(object sender, EventArgs e)
{
    // 等待WebView2控件初始化完成
    await webView21.EnsureCoreWebView2Async(null);

    // 获取WebView2控件的CoreWebView2对象
    CoreWebView2 coreWebView2 = webView21.CoreWebView2;

    // 注册下载事件
    coreWebView2.NavigationCompleted += CoreWebView2_NavigationCompleted;
}

// 下载事件处理方法
private void CoreWebView2_NavigationCompleted(object sender, CoreWebView2NavigationCompletedEventArgs e)
{
    // 判断是否是下载请求
    if (e.IsSuccess && e.Uri.StartsWith("https://example.com/download/"))
    {
        // 获取下载的文件类型
        string contentType = e.ResponseHeaders["Content-Type"];

        // 根据文件类型指定下载位置
        string downloadPath = "";
        if (contentType == "application/pdf")
        {
            downloadPath = @"C:\Downloads\PDFs";
        }
        else if (contentType == "image/jpeg" || contentType == "image/png")
        {
            downloadPath = @"C:\Downloads\Images";
        }
        else
        {
            downloadPath = @"C:\Downloads\Others";
        }

        // 设置下载位置
        e.DownloadPath = downloadPath;
    }
}