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[Winform]CefSharp ——js调用c#方法
摘要
有时我们在winform中嵌入浏览器，需要在页面上读取电脑上的一些信息，这个时候就需要用到CefSharp的RegisterJsObject进行注册方法然后供js进行调用了。
一个例子
我们在winform中嵌入的页面中，显示电脑的信息，电脑信息通过winform进行读取，js调用获取电脑信息的方法，并将最终结果以json字符串的形式传递到js端，js获取到这些信息并在页面上进行显示。
定义一个专门处理js回调的类
/// <summary> /// js c#回调类 /// </summary> class ScriptCallbackManager { /// <summary> /// 查找电脑信息 /// </summary> /// <param name="javascriptCallback"></param> public void FindComputerInfo(IJavascriptCallback javascriptCallback) { Task.Factory.StartNew(async () => { using (javascriptCallback) { Computer computer = new Computer(); string response = JsonConvert.SerializeObject(new { cpu_id = computer.CPU_Id, disk_id = computer.Disk_Id, host_name = computer.HostName, networkcard = computer.NetworkCard, serialNumber = computer.SerialNumber_Manufacturer_Product.Item1, manufacturer = computer.SerialNumber_Manufacturer_Product.Item2, product = computer.SerialNumber_Manufacturer_Product.Item3, }); await javascriptCallback.ExecuteAsync(response); } }); } }
其中computer类为获取电脑信息的操作类
/// <summary> /// 电脑信息类 /// </summary> public class Computer { /// <summary> /// 查找cpu的id /// </summary> /// <returns></returns> public string CPU_Id { get { try { string str = string.Empty; ManagementClass mcCPU = new ManagementClass("win32_Processor"); ManagementObjectCollection mocCPU = mcCPU.GetInstances(); foreach (ManagementObject m in mocCPU) { str = m["Processorid"].ToString().Trim().Substring(0, 8); break; } return str; } catch (Exception) { return string.Empty; } } } public string Disk_Id { get { try { string hdId = string.Empty; ManagementClass hardDisk = new ManagementClass("win32_DiskDrive"); ManagementObjectCollection hardDiskC = hardDisk.GetInstances(); foreach (ManagementObject m in hardDiskC) { hdId = m.Properties["Model"].Value.ToString();//WDC WD800BB-56JKC0 break; } return hdId; } catch (Exception) { return string.Empty; } } } /// <summary> /// 网卡 /// </summary> public string NetworkCard { get { try { string MoAddress = string.Empty; ManagementClass networkAdapter = new ManagementClass("Win32_NetworkAdapterConfiguration"); ManagementObjectCollection adapterC = networkAdapter.GetInstances(); foreach (ManagementObject m in adapterC) { if ((bool)m["IPEnabled"] == true) { MoAddress = m["MacAddress"].ToString().Trim(); m.Dispose(); } } return MoAddress; } catch { return string.Empty; } } } /// <summary> /// 获取序列号，制造商，型号 /// </summary> public Tuple<string, string, string> SerialNumber_Manufacturer_Product { get { try { Tuple<string, string, string> tuple = null; new Tuple<string, string, string>(string.Empty,
string.Empty, string.Empty); ManagementObjectSearcher mos = new ManagementObjectSearcher("select * from Win32_baseboard"); foreach (ManagementObject m in mos.Get()) { tuple = new Tuple<string, string, string>(m["SerialNumber"].ToString(), m["Manufacturer"].ToString(),
m["Product"].ToString()); } return tuple; } catch (Exception) { return null; } } } /// <summary> /// 计算机名称 /// </summary> public string HostName { get { return System.Net.Dns.GetHostName(); } } }
嵌入的页面
<!DOCTYPE html><html lang="en" xmlns="http://www.w3.org/1999/xhtml"><head> <meta charset="utf-8" /> <title></title> <script src="js/jquery.min.js"></script> <script> //设置电脑信息 function callback(data) { data = JSON.parse(data); $("#msg").html(‘‘); $("#msg") .append($("<li>cpu_id:" + data.cpu_id + "</li>")) .append($("<li>disk_id:" + data.disk_id + "</li>")) .append($("<li>host_name:" + data.host_name + "</li>")) .append($("<li>networkcard:" + data.networkcard + "</li>")) .append($("<li>serialNumber:" + data.serialNumber + "</li>")) .append($("<li>manufacturer:" + data.manufacturer + "</li>")) .append($("<li>product:" + data.product + "</li>")); }; function findComputerInfo() { //调用后台C#FindComputerInfo，返回结果回调方法callback googleBrower.FindComputerInfo(callback); }; </script></head><body> <button onclick="findComputerInfo()">获取电脑信息</button> <ul id="msg"></ul></body></html>
单击按钮，在页面上显示当前电脑信息
窗体代码
/// <summary> /// 主窗体 /// </summary> public partial class MainFrm : Form { private CefSharp.CefSettings _settings; CefSharp.WinForms.ChromiumWebBrowser _webView; public MainFrm() { InitializeComponent(); _settings = new CefSharp.CefSettings(); CefSharp.Cef.Initialize(_settings); this.FormClosed += MainFrm_FormClosed; } void MainFrm_FormClosed(object sender, FormClosedEventArgs e) { if (_webView != null) { _webView.Dispose(); } } private void MainFrm_Load(object sender, EventArgs e) { this.WindowState = FormWindowState.Maximized; string url = "file:///E:/xxx/bin/x64/Debug/lenovo/test.html"; LoadPage(url); } /// <summary> /// 加载页面 /// </summary> /// <param name="url"></param> private void LoadPage(string url) { if (_webView == null) { _webView = new CefSharp.WinForms.ChromiumWebBrowser(url); _webView.Dock = DockStyle.Fill; _webView.LifeSpanHandler = new OpenPageSelf(); _webView.RegisterJsObject("googleBrower", new ScriptCallbackManager(),
new CefSharp.BindingOptions { CamelCaseJavascriptNames = false }); this.Controls.Add(_webView); } else { _webView.Load(url); } } }
测试
总结
通过在winform嵌入浏览器，可以很方便处理h5页面的展示，不用再使用winform再开发一个客户端的程序，完全可以嵌入要开发的h5应用，这样完全应用了h5的特点，可以在电脑端，移动端访问，而不是每个终端都写代码。
[Winform]CefSharp ——js调用c#方法
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