public partial class App : Application

    {

        public App()

        {

            this.Startup += (o1, e1)=>{

                string commandLine = Environment.CommandLine;　　

                string appFilePath = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName;

                commandLine = commandLine.Replace(String.Format("\"{0}\" ", appFilePath), ""); 得到命令参数

                MessageBox.Show(string.Format("commandLine:{0}", Environment.CommandLine));

                MessageBox.Show("SpiltResult:" + commandLine);

                if (!string.IsNullOrEmpty(commandLine) && commandLine.ToUpper() == "SA")//启动参数带SA则转到特殊处理页面

                {

                    this.ShutdownMode = ShutdownMode.OnLastWindowClose;

                    this.StartupUri = new Uri("pack://application:,,,/Views/SNPrint/SA_MODE.xaml");　　//

                    MessageBox.Show("Set URI!");

                }
                //正常App.xaml中存在StartupUri如【StartupUri="MasterWindow.xaml"】则可以省略下面代码

                //else

                //{

                //    this.StartupUri = new Uri("pack://application:,,,/MasterWindow.xaml");

                //    MessageBox.Show("MAIN URI!");

                //}

            };

        }

    }