SaveFileDialog, file does not exist

Question

I have to process an XML file (I am choosing a file with OpenFileDialog [code not present here] and when I click the second button the XML is processed to show a tree structure of that XML that has to be saved in the other file). But when I use SaveFileDialog , I want to enter a file name of the file which does not exist yet. How should I do that if I enter the filename that does not exits , an empty file will be created ?

       private void button2_Click(object sender, EventArgs e)
        {
        SaveFileDialog fDialog = new SaveFileDialog();
        fDialog.Title = "Save XML File";
        fDialog.FileName = "drzewo.xml";
        fDialog.CheckFileExists = false;
        fDialog.InitialDirectory = @"C:\Users\Piotrek\Desktop";

        if (fDialog.ShowDialog() == DialogResult.OK)
        {

            MessageBox.Show(fDialog.FileName.ToString());
        }

        string XMLdrzewo = fDialog.FileName.ToString();
        XDocument xdoc = XDocument.Load(XMLdrzewo);
        //// some code processing xml file
        /// not ready yet, have to write to that file the tree
        //structure of  selected XML file

        textBox2.Text = File.ReadAllText(XMLdrzewo);

When file does not exist I get FileNotFoundException was unhandled.

Answer 1

the code that creates your filename should be inside the if statement.

if (fDialog.ShowDialog == DialogResult.OK)
{

}

Then, you need to create a file first, eg var stream = File.Create(filename) . Then you can fill that file with the "to be created stuff" and store the xml part in your newly created file.

Something like:

if (fDialog.ShowDialog() == DialogResult.OK)
{

    using (var newXmlFile = File.Create(fDialog.FileName);
    {
           var xd = new XmlDocument();
           var root = xd.AppendChild(xd.CreateElement("Root"));
           var child = root.AppendChild(xd.CreateElement("Child"));
           var childAtt = child.Attributes.Append(xd.CreateAttribute("Attribute"));
           childAtt.InnerText = "My innertext";
           child.InnerText = "Node Innertext";
           xd.Save(newXmlFile);
    }
}