如何检查程序是否第一次运行？

Question

My program sets its display based on if the program is running for the first time or not. In order to determine if the program is running for the first time I am currently using a

//this boolean exists within my programs settings
Setting boolean FirstRun = True;

When the program runs it calls a method that checks the state of that bool value and acts accordingly:

if(Properties.Settings.FirstRun == true)
{ lblGreetings.Text = "Welcome New User";
  //Change the value since the program has run once now
  Properties.Settings.FirstRun = false;
  Properties.Settings.Save(); }
else
{ lblGreetings.Text = "Welcome Back User"; }

It seems to work pretty effectively, however if the .exe file is moved and launched from a new location it considers it a first run, and I'm concerned that I'm doing this in a messy fashion and perhaps there exists a more efficient manner to test for the programs first run. Is there a better way to do this?

Answer 1

Seems that your problem is actually that if you move executable to another location/folder on the same pc, it loses somehow the information about the fact that it was already run at least once.

Using UserSettings , on Properties.Settings.Default.FirstRun should resolve your problem.

Something like this, a pseudocode :

if(Properties.Settings.Default.FirstRun == true)
{ lblGreetings.Text = "Welcome New User";
  //Change the value since the program has run once now
  Properties.Settings.Default.FirstRun = false;
  Properties.Settings.Default.Save(); }
else
{ lblGreetings.Text = "Welcome Back User"; }

Look on this sample how to achieve that in more detailed way.

Answer 2

Since your question appears to be concerned about each user that launches the application, then you should design a per-user solution.

Using Properties.Settings will actually work and be efficient as long as the setting in question is user-specific.

However, if this is not desired or appropriate for your application, you could also write a user-specific entry to the registry.

For example:

        const string REGISTRY_KEY = @"HKEY_CURRENT_USER\MyApplication";
        const string REGISTY_VALUE = "FirstRun";
        if (Convert.ToInt32(Microsoft.Win32.Registry.GetValue(REGISTRY_KEY, REGISTY_VALUE, 0)) == 0)
        {
            lblGreetings.Text = "Welcome New User";
            //Change the value since the program has run once now
            Microsoft.Win32.Registry.SetValue(REGISTRY_KEY, REGISTY_VALUE, 1, Microsoft.Win32.RegistryValueKind.DWord);
        }
        else
        {
            lblGreetings.Text = "Welcome Back User";
        }

Answer 3

Hard to guess what is messy if you don't post or describe it. An obvious approach is to have a setting named "ExePath". If you get null or a string that doesn't match Assembly.GetEntryAssembly().Location then it got either just installed or moved.