Pass path from form on button click

Question

I am using this code to generate the path of a selected file:

       private void LoadNewFile()
{
    OpenFileDialog ofd = new OpenFileDialog();
    string _xmlPath1 = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);
    System.Windows.Forms.DialogResult dr = ofd.ShowDialog();
    if (dr == DialogResult.OK)
    {
        userSelectedFilePath = ofd.FileName;
    }
}

        private void tbFilePath_TextChanged(object sender, EventArgs e)
        {

        }

Before i used this code to pass the data:

 private void btn_compare_Click(object sender, EventArgs e)
        {
            string x1 = System.IO.File.ReadAllText(@"C:\Users", Encoding.UTF8);

How do i modify it that instead of x1 that takes the path manually, i need it to be equal to xmlPath1 , so string x1 = xmlPath1

well, before i just inserted the path of the file manually as you can see, now i take it from a dialog, and i need to assign the x1 variable the path — MAL
– MAL, Commented Sep 4, 2014 at 9:25
I guess he wants to pass _xmlPath1 to btn_compare_Click(...) to use it there — DMAN
– DMAN, Commented Sep 4, 2014 at 9:38
on my btn_compare_Click the string x1 should be equal to the path i selected with the dialog opener — MAL
– MAL, Commented Sep 4, 2014 at 9:38

DMAN · Accepted Answer · 2014-09-04 09:51:18Z

0

Just change _xmlPath1 to a field and you can access it from any method within your class.

Example:

public class MyClass
{
    protected String _xmlPath1;

    ' insert your methods here
}

If your methods are not in the same class you have to widen the scope of _xmlPath1 even more.

EDIT: Changed VB.net syntax to C#

edited Sep 4, 2014 at 9:51

answered Sep 4, 2014 at 9:42

DMAN

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2 Comments

MAL Over a year ago

hmm i'm not understanding where should i insert that code, my methods ar ein the same class

DMAN Over a year ago

MyClass is just a placeholder for your real class name. Just put the line directly beneath your class definition. For further reading on this topic, have a look at this link

George Vovos · Accepted Answer · 2014-09-04 09:54:23Z

1 )If userSelectedFilePath is a private field you can use it in btn_compare_Click
2 )If it is a local variable ,make it a private field and then see 1
3)Make the the method return the file

private string LoadNewFile()
{
   OpenFileDialog ofd = new OpenFileDialog();
   string _xmlPath1 = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);
   System.Windows.Forms.DialogResult dr = ofd.ShowDialog();
   if (dr == DialogResult.OK)
      return  ofd.FileName;
   else
      return null;

}

and use it (you must add validation logic)

private void btn_compare_Click(object sender, EventArgs e)
{
        string x1 = System.IO.File.ReadAllText(LoadNewFile(), Encoding.UTF8);
}

Option 3 is the best way so you can avoid the extra field and make btn_compare_Click independent from the rest of the code.
In that case you should also give it a better name like GetFileToRead()

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