save the file in 1 min interval if some changes happened in wpf c#

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I have a xml file which i have to load in richtextbox in wpf. if some changes occure in txt file then it will save in different path automatically after a time interval of 1 min. Let the 1st changes happens in 10:11 then all the changes made up to 10:12 will save.File creation time will be 10:12 then again the richtextbox will be modified at 10:50 then the file modified time will be 10:51.The loading and the saving path is different.

private void startSaveTimer()
{
Timer saveTimer = new Timer(60000);
saveTimer.Elapsed += saveTimer_Elapsed;
saveTimer.Start();
}

private void saveTimer_Elapsed(object sender, ElapsedEventArgs e)
{
string filepath = @"C:\mydoc.txt";//file save path
if (File.Exists(filepath))
{
FileStream file = new FileStream(filepath, FileMode.Open);
//geting the content from file and compare with richtextbox data
//if not same then saving it again
}
else
{
//save file
}
}

private void richText_TextChanged(object sender, TextChangedEventArgs e)
{
startSaveTimer();
}
but this code called in each single changed so
FileStream file = new FileStream(filepath, FileMode.Open); is showing error as used by different user. try to keep lock still got the same error.
Thanks in advance

Posted 13-Jun-15 3:29am

Starlene

Updated 14-Jun-15 6:19am

v4

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CHill60 13-Jun-15 9:48am

What have you tried? What is not working in your code?

Starlene 14-Jun-15 12:14pm

added the code and the error

1 solution

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LLLLGGGG · Accepted Answer · 2015-06-13T08:07:00

Hi,

You can use something like a DispatcherTimer and set its interval to 60000 milliseconds, or, if not available, 1000 milliseconds and then count 60 occurrences of the method.

Then you can do this way:

1. Use the event TextChanged of the RichTextBox control and set a bool flag (called, for istance, Saved) to false to indicate that it is not saved and then start the timer if not already started.
2. In the timer handler, if set to 60000 millis, save the richtextbox and disable the timer. This way the document does not get saved if no modifies are made in the next minutes.

Here is the code:

C#

FileStream file = new FileStream(filepath, FileMode.Open);

Timer saveTimer = new Timer(60000);
private void startSaveTimer()
{

saveTimer.Elapsed += saveTimer_Elapsed;
saveTimer.Start();
}
private bool saved=true;
private void saveTimer_Elapsed(object sender, ElapsedEventArgs e)
{
string filepath = @"C:\mydoc.txt";//file save path
if (!saved)
{
//save file
saved=true;
timer.enabled=false;
}
}

private void richText_TextChanged(object sender, TextChangedEventArgs e)
{
saved=false
if(!timer.enabled)
timer.enabled=true;
}

I hope this helps...

PS: I advise you to get the current RichTextBox content and pass it in another thread in order not to block the UI while you are saving... This can save you some troubles :)

LG