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
![[Winform]CefSharp ——js调用c#方法](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0hNNkx5OXBiV0ZuWlhNeU1ERTFMbU51WW14dlozTXVZMjl0TDJKc2IyY3ZOVEV4TmpFMkx6SXdNVGN3Tmk4MU1URTJNVFl0TWpBeE56QTJNREl4TkRBd01EWTJOalF0TWpBeU1qVXlPREk0TXk1d2JtYz0%3D.jpg?w=700&webp=1 "[Winform]CefSharp ——js调用c#方法")
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。