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How do I allow only one instance of a WPF application to run?
Thanks.
829
The best way of accomplishing this is using a named mutex. Create the mutex using code such as: bool firstInstance; Mutex mutex = new Mutex(false, "Local\\" + someUniqueName, out firstInstance); // If firstInstance is now true, we're the first instance of the application; // otherwise another instance is running.
Making a singleton application, i.e., preventing users from opening multiple instances of your app, can be easily implemented using a Mutex. A Mutex is similar to a C# lock, except it can work across multiple processes, i.e. it is a computer-wide lock.
A Single Instance application is an application that limits the program to run only one instance at a time. This means that you cannot open the same program twice.
BAML file from assembly resources, parses it, and creates a corresponding WPF visual tree or workflow. Having this format, the content is loadable faster during runtime, because the XAML is enriched by tokens, and lexical analysis is completed.
http://blogs.microsoft.co.il/blogs/arik/archive/2010/05/28/wpf-single-instance-application.aspx
Doesn't require VB.DLL as some other examples advise. Has WPF sample code. Passes any cmd line args to initial instance.
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