CODEWITHSUNDEEP
c#winformsrichtextbox
Toby
Toby

Reputation: 377

Why is the "IndexOutOfRangeException" occurring

I am following this tutorial on how to allow my program to open files using the "Open With" method found in Windows. However, as soon as the program loads, it crashes with the error "IndexOutOfRangeException".

My code is as follows.

public static void Main(string[] args)
    {
        if(args[0] != null)
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Basic_Word_Processor());
            Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.LoadFile(@args.ToString());
        }
        else
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Basic_Word_Processor());
        }

What is causing this exception to occur?

Upvotes: 0

Views: 320

Answers (1)

gzaxx
gzaxx

Reputation: 17600

this: args[0] because when args are null you are trying to access first element of array that does not exists.

So to fix you program you have to check if args is not null:

if(args != null && args.Length > 0)
{
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Basic_Word_Processor());
            Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.LoadFile(args[0].ToString());
}
else
{
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Basic_Word_Processor());
}

Upvotes: 5

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