using System;

using System.Collections.Generic;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Windows;

using System.Diagnostics;

using System.Data.SqlClient;

namespace wpf

{

    /// <summary>

    /// App.xaml 的交互逻辑

    /// </summary>

    public partial class App : Application

    {

        public static System.Threading.Mutex Run;

        protected override void OnStartup(StartupEventArgs e)

        {

            //注册事件

            Application.Current.DispatcherUnhandledException += Current_DispatcherUnhandledException;

            base.OnStartup(e);

            bool noRun = false;

            try

            {

                //判断是否在运行

                Run = new System.Threading.Mutex(true, Process.GetCurrentProcess().ProcessName, out noRun);

                if (noRun)

                {

                    //获取进程名

                    Process[] localByName = Process.GetProcessesByName(Process.GetCurrentProcess().ProcessName);

                    Run.ReleaseMutex();

                    //项目中配置文件中的信息

                    string path = ConfigurationManager.ConnectionStrings["conn"].ToString();

                    //判断数据的连接

                    SqlConnection con = new SqlConnection(path);

                    try

                    {

                        con.Open();

                        if (con.State == ConnectionState.Open)

                        {

                            new Login().Show();

                        }

                        else

                        {

                            MessageBox.Show("数据库连接失败！", "信息提示", MessageBoxButton.OK, MessageBoxImage.Warning);

                            Application.Current.Shutdown();

                        }

                    }

                    catch (Exception q)

                    {

                        MessageBox.Show("数据库连接失败！", "信息提示", MessageBoxButton.OK, MessageBoxImage.Warning);

                        Application.Current.Shutdown();

                    }

                }

                else

                {

                    MessageBox.Show("程序已在运行！", "信息提示", MessageBoxButton.OK, MessageBoxImage.Information);

                    //Application.Current.Shutdown();

                 //  string proName=  Process.GetCurrentProcess().ProcessName;

                }

            }

            catch (Exception q)

            {

                MessageBox.Show("数据库连接失败！", "信息提示", MessageBoxButton.OK, MessageBoxImage.Warning);

                Application.Current.Shutdown();

            }

        }

        /// <summary>

        /// 程序未知的异常的方法事件

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        void Current_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)

        {

            MessageBox.Show("我们很抱歉，当前应用程序遇到一些问题，该操作已经终止,请重新启动.", "意外的操作", MessageBoxButton.OK, MessageBoxImage.Information);//这里通常需要给用户一些较为友好的提示，并且后续可能的操作

            Application.Current.Shutdown();

            //string proName = Process.GetCurrentProcess().ProcessName;

           // Process[] localByName = Process.GetProcessesByName(proName);//因为可以同时启动多

            e.Handled = true;//使用这一行代码告诉运行时，该异常被处理了，不再作为UnhandledException抛出了。

        }

        /// <summary>

        /// 根据进程名称进行关闭进程

        /// </summary>

        /// <param name="procesName"></param>

        public void killPro(string procesName)

        {

            try

            {

                foreach (System.Diagnostics.Process Pro in System.Diagnostics.Process.GetProcessesByName(procesName))

                {

                    if (!Pro.CloseMainWindow())

                    {

                        Pro.Kill();

                    }

                }

            }

            catch { }

        }

    }

}