Program.cs
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using log4net;
using log4net.Config;
using OnlineStore.Common;
using OnlineStore.DoubleLineClient;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace OnlineStore.DoubleLineClient
{
static class Program
{
#region 方法四：使用的Win32函数的声明
/// <summary>
/// 找到某个窗口与给出的类别名和窗口名相同窗口
/// </summary>
/// <param name="lpClassName">类别名</param>
/// <param name="lpWindowName">窗口名</param>
/// <returns>成功找到返回窗口句柄,否则返回null</returns>
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
/// <summary>
/// 切换到窗口并把窗口设入前台,类似 SetForegroundWindow方法的功能
/// </summary>
/// <param name="hWnd">窗口句柄</param>
/// <param name="fAltTab">True代表窗口正在通过Alt/Ctrl +Tab被切换</param>
[DllImport("user32.dll ", SetLastError = true)]
static extern void SwitchToThisWindow(IntPtr hWnd, bool fAltTab);
/// <summary>
/// 设置窗口的显示状态
/// </summary>
/// <param name="hWnd">窗口句柄</param>
/// <param name="cmdShow">指示窗口如何被显示</param>
/// <returns>如果窗体之前是可见，返回值为非零；如果窗体之前被隐藏，返回值为零</returns>
[DllImport("user32.dll", EntryPoint = "ShowWindow", CharSet = CharSet.Auto)]
public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);
public const int SW_RESTORE = 9;
public static IntPtr formhwnd;
public static readonly ILog LOGGER = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main(string[] Args)
{
Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
// 因为方法三只能是最小化的窗体显示出来，如果隐藏到托盘中则不能把运行的程序显示出来
Process currentproc = Process.GetCurrentProcess();
Process[] processcollection = Process.GetProcessesByName(currentproc.ProcessName.Replace(".vshost", string.Empty));
// 该程序已经运行，
bool isShow = false;
if (processcollection.Length >= 1)
{
foreach (Process process in processcollection)
{
if (process.Id != currentproc.Id)
{
// 如果进程的句柄为0，即代表没有找到该窗体，即该窗体隐藏的情况时
if (process.MainWindowHandle.ToInt32().Equals(0))
{
string formTitle = ConfigAppSettings.GetValue(Setting_Init.App_Title);
// 获得窗体句柄
formhwnd = FindWindow(null, formTitle);
// 重新显示该窗体并切换到带入到前台
ShowWindow(formhwnd, SW_RESTORE);
SwitchToThisWindow(formhwnd, true);
isShow = true;
break;
}
else
{
// 如果窗体没有隐藏，就直接切换到该窗体并带入到前台
// 因为窗体除了隐藏到托盘，还可以最小化
SwitchToThisWindow(process.MainWindowHandle, true);
isShow = true;
break;
}
}
}
}
if (!isShow)
{
log4net.Config.XmlConfigurator.Configure();
// XmlConfigurator.Configure();
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new FrmVMIClient());
}
}
static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
{
string errorMsg = GetExceptionMsg(e.ExceptionObject as Exception, e.ToString());
MessageBox.Show(errorMsg, "系统错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
LogUnhandledException(errorMsg);
}
static void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
{
string errorMsg = GetExceptionMsg(e.Exception as Exception, e.ToString());
MessageBox.Show(errorMsg, "系统错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
LogUnhandledException(errorMsg);
}
static void LogUnhandledException(string errorMsg)
{
//这里可以进一步地写日志
LogUtil.error(errorMsg);
}
/// <summary>
/// 生成自定义异常消息
/// </summary>
/// <param name="ex">异常对象</param>
/// <param name="backStr">备用异常消息：当ex为null时有效</param>
/// <returns>异常字符串文本</returns>
static string GetExceptionMsg(Exception ex, string backStr)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine("****************************异常文本****************************");
sb.AppendLine("【出现时间】：" + DateTime.Now.ToString());
if (ex != null)
{
sb.AppendLine("【异常类型】：" + ex.GetType().Name);
sb.AppendLine("【异常信息】：" + ex.Message);
sb.AppendLine("【堆栈调用】：" + ex.StackTrace);
}
else
{
sb.AppendLine("【未处理异常】：" + backStr);
}
sb.AppendLine("***************************************************************");
return sb.ToString();
}
}
}