I want to write a program where I can load files into, for example XML.
When the file is uploaded, I want to use the data that is in the file.
can someone help me please.


There is no problem with showing the files (list of files), the problem is when you want to show file`s content. There is a big difference if file is xml, txt or some oteher type.
So what can it be?

I hope xlm, txt,... .But if I can open a txt then i'm happy.
When that works, I can change the program myself.

Ok, I did an example code, how to upload files and show then in the list (listBox control). Then I added a richTextBox control on the form which is meant to show the file`s content (text usually).

NOTE: Dont forget to add a new namespace on top of the class when using FileInfo and StreamReader classes. This namespace its called System.IO;
So here it is:

//add a namespace on top here:
using  System.IO;
//among other namespases...

    public partial class Form1 : Form
        List<FileInfo> listFiles;
        public Form1()

        private void button1_Click(object sender, EventArgs e)
            OpenFileDialog open = new OpenFileDialog();
            open.Filter = "text files (*.txt)|*.txt|xml files (*.xml)|*.xml";
            open.Multiselect = true;
            open.InitialDirectory = @"C:\";
            if (open.ShowDialog() == DialogResult.OK)
                listFiles = new List<FileInfo>();
                FileInfo fi;
                for (int i = 0; i < open.FileNames.Length; i++)
                    fi = new FileInfo(open.FileNames[i]);

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
            if (listBox1.SelectedIndex > -1)
                richTextBox1.Text = "";
                string fileName = listBox1.SelectedItems[0].ToString();
                foreach (FileInfo fi in listFiles)
                    if (fileName == Path.GetFileName(fi.FullName))
                        using (StreamReader sr = new StreamReader(fi.FullName))
                            string text;
                            while ((text = sr.ReadLine()) != null)
                                richTextBox1.AppendText(text + "\n");

This code works, and so far it only opends *.txt files.

nice 1
It work very well.

thank you

You can adda rep +1 :)
I was trying really hard on the Sunday afternoon.

of course.
I had forgotten to do that.