CODEWITHSUNDEEP
c#
user5939530
user5939530

Reputation: 51

How to access variable from multiple button handlers

In my app, the user can browse and select a text file. I'm saving the path like this:

private void nacitanie_Click(object sender, EventArgs e)
    {
        OpenFileDialog dialog = new OpenFileDialog();
        dialog.Title = "Otvoriť Textový súbor.";
        dialog.Filter = "TXT files|*.txt";
        dialog.InitialDirectory = @"C:\";
        if (dialog.ShowDialog() == DialogResult.OK)
        {
            string path = dialog.FileName;
        }
    }

Then I need to work with that path in other buttons. How can I return the path of the text file from the button handler method?

Upvotes: 3

Views: 57

Answers (2)

Roman
Roman

Reputation: 12201

You should create path outside nacitanie_Click:

class SomeClass
{
private string path;
.....
private void nacitanie_Click(object sender, EventArgs e)
    {
        OpenFileDialog dialog = new OpenFileDialog();
        dialog.Title = "Otvoriť Textový súbor.";
        dialog.Filter = "TXT files|*.txt";
        dialog.InitialDirectory = @"C:\";
        if (dialog.ShowDialog() == DialogResult.OK)
        {
            path = dialog.FileName;
        }
    }
....
}

and the use it in another methods/handlers.

Upvotes: 1

Nate Barbettini
Nate Barbettini

Reputation: 53700

You need to declare a variable outside of the button handler method:

private string path = string.Empty;

private void nacitanie_Click(object sender, EventArgs e)
    {
        OpenFileDialog dialog = new OpenFileDialog();
        dialog.Title = "Otvoriť Textový súbor.";
        dialog.Filter = "TXT files|*.txt";
        dialog.InitialDirectory = @"C:\";
        if (dialog.ShowDialog() == DialogResult.OK)
        {
            path = dialog.FileName;
        }
    }

That way, you'll be able to access the variable from other button handlers.

Upvotes: 0

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