win-service-machine-dll/PrintHtml/PrintFrom.cs

using Microsoft.Web.WebView2.Core;
using Microsoft.Web.WebView2.WinForms;
using System;
using System.IO;
using System.Windows.Forms;

namespace PrintHtml
{
    public partial class PrinFrom : Form
    {
        string html = @"D:\index.html";
        public PrinFrom(string inParams)
        {
            InitializeComponent();
            AwaitCoreWebView2Async(webView21); //设置浏览器参数
            //webView21.Source = new Uri("https://www.baidu.com/");  //加载html
            //webView21.Dock = DockStyle.Fill;
            //this.webView21.CoreWebView2.NavigateToString(html);
            
            webView21.CoreWebView2InitializationCompleted += WebView21_CoreWebView2InitializationCompleted;
            Initialize();
            //var printSettings = this.webView21.CoreWebView2.Environment.CreatePrintSettings();
            /*
            webView.CoreWebView2.NavigationCompleted += async (sender, e) =>
            {
                
                printSettings.ShouldPrintHeaderAndFooter = false;
                printSettings.MarginLeft = 0;
                printSettings.MarginTop = 0;
                printSettings.MarginRight = 0;
                printSettings.MarginBottom = 0;
                //webView.CoreWebView2.ShowPrintUI();
                //await webView.CoreWebView2.PrintAsync(printSettings);
                //window.print();
                //form.Close();
            };
            */
        }
        private void WebView21_CoreWebView2InitializationCompleted(object sender, CoreWebView2InitializationCompletedEventArgs e)
        {
            webView21.CoreWebView2.Navigate("https://www.baidu.com/");
        }
        /// <summary>
        /// WebView2初始化
        /// </summary>
        async void Initialize()
        {
            var result = await CoreWebView2Environment.CreateAsync(null, Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "cache"), null);
            await webView21.EnsureCoreWebView2Async(result);
        }
            private void WebView2_NavigationCompleted(object sender, CoreWebView2NavigationCompletedEventArgs e)
        {
        }
        private void Form1_Load(object sender, EventArgs e)
        {
        }
        private async void AwaitCoreWebView2Async(WebView2 WebView21)
        {
            //string userDataFolder = null;   //"你的缓存文件夹路径";
            //CoreWebView2EnvironmentOptions options = new CoreWebView2EnvironmentOptions($"--lang=zh-CN");
            //var environment = await CoreWebView2Environment.CreateAsync(null, userDataFolder, options);
            // Create a WebView with the specified environment.
            //await WebView21.EnsureCoreWebView2Async(environment);

        }
    }
}