MVVM pattern in WPF

Question

Hi,

I want to start learning MVVM pattern in WPF. What is MVVM pattern and how to start..? Please help....

Thank You...

Answer 1

Dear this is For 15 days you can change as per your requirment




Please try thic Procedure put this om main for load event
its also restrict of date change itvery use full

let me know


  private DateTime RegDate;
  private DateTime todayDate;
  private void CheckLicenceAgreement()
  {
  try
  {
  //If Not Exist The Add Date Firet Time
  if (Convert.ToString(Application.UserAppDataRegistry.GetValue("RegDate")) == "")
  {
  RegDate = DateTime.Now;
  RegDate  = RegDate.AddDays(15);

  Application.UserAppDataRegistry.SetValue("RegDate", RegDate.ToString("yyyyMMdd"));
  Application.UserAppDataRegistry.SetValue("ApplicationStart", "1");
  }
  else
  {
  //Check It

  Int32 Regdt;
  Int32 todt;
  Regdt = Convert.ToInt32(Application.UserAppDataRegistry.GetValue("RegDate"));
  todt = Convert.ToInt32(System.DateTime.Now.ToString("yyyyMMdd"));

  if ((todt > Regdt) || (Convert.ToString(Application.UserAppDataRegistry.GetValue("ApplicationStart")))=="0")
  {
  Application.UserAppDataRegistry.SetValue("ApplicationStart", "0");
  Application.Exit(); 
  }
  }
  }
  catch (Exception ex)
  {
  Application.Exit(); 
  } 
  }