/**
* Click handler for the File -> Open MainMenu item. Implements opening a file using the built in
* OpenFileDialog provided by .NET. The deserialized file is loaded into a FileSystemDocument object, and
* then our MainForm's properties are set using the FileSystemDocument's properties.
*/
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
using (OpenFileDialog dlg = new OpenFileDialog())
{
if (dlg.ShowDialog() != DialogResult.OK)
{
return;
}
using (Stream stream =
new FileStream(dlg.FileName, FileMode.Open, FileAccess.Read))
{
IFormatter formatter = new BinaryFormatter();
Documents.Drivers.FileSystemDocument document =
(Documents.Drivers.FileSystemDocument)formatter.Deserialize(stream);
document.FilePath = dlg.FileName;
this.TextBox.Text = document.Text;
this.TextBox.BackColor = document.BackColor;
this.TextBox.ForeColor = document.TextColor;
this.TextBox.Font = document.Font;
this.Location = document.DocumentLocation;
this.Text = document.DocumentTitle;
// Set this instance of the application's document properties to the ones just retrieved from
// deserialization - needed for detecting if a file has been saved before in File->Save
this.document = document;
this.StatusLabel.Text = "Opened file: " + this.document.DocumentTitle;
}
}
}
/**
* Click handler for the File -> Save MainMenu item. Implements saving a file using the built in
* SaveFileDialog provided by .NET. The FileSystemDocument properties are set, and then once set we pass
* the stream and the document to Serialize to serialize the document's members.
*/
private void saveToolStripMenuItem_Click(object sender, EventArgs e)
{
// If the document is new, i.e. has never been saved before
if (string.IsNullOrEmpty(this.document.DocumentTitle) || string.IsNullOrWhiteSpace(this.document.DocumentTitle))
{
using (SaveFileDialog dlg = new SaveFileDialog())
{
if (dlg.ShowDialog() != DialogResult.OK)
{
return;
}
using (Stream stream =
new FileStream(dlg.FileName, FileMode.Create, FileAccess.Write))
{
IFormatter formatter = new BinaryFormatter();
Documents.Drivers.FileSystemDocument document = new Documents.Drivers.FileSystemDocument();
document.Text = this.TextBox.Text;
document.BackColor = this.TextBox.BackColor;
document.TextColor = this.TextBox.ForeColor;
document.Font = this.TextBox.Font;
document.DocumentLocation = this.Location;
document.DocumentTitle = Path.GetFileName(dlg.FileName);
document.DocumentSize = this.Size;
document.FilePath = dlg.FileName;
formatter.Serialize(stream, document);
this.document = document;
changedText = false;
this.StatusLabel.Text = "Saved";
}
}
this.Text = this.document.DocumentTitle;
}
// If the document not new, and has been saved before
else
{
using (Stream stream = new FileStream(this.document.FilePath, FileMode.Create, FileAccess.Write))
{
IFormatter formatter = new BinaryFormatter();
this.document.Text = this.TextBox.Text;
this.document.BackColor = this.TextBox.BackColor;
this.document.TextColor = this.TextBox.ForeColor;
this.document.Font = this.TextBox.Font;
this.document.DocumentSize = this.Size;
this.document.DocumentLocation = this.Location;
this.document.DocumentTitle = Path.GetFileName(document.FilePath);
formatter.Serialize(stream, document);
}
changedText = false;
this.Text = this.document.DocumentTitle;
this.StatusLabel.Text = "Saved";
}
}
/**
* Click handler for the File -> New MainMenu item. Implements creating a new file/document by creating a
* new instance of the FileSystemDocument class and setting this application's document to the newly
* created document. The current application insance's TextBox and Text (title bar) are reset. Setting this
* application insance's document to the newly created document also resets the FilePath associated with the
* document.
*/
private void newToolStripMenuItem_Click(object sender, EventArgs e)
{
Documents.Drivers.FileSystemDocument document = new Documents.Drivers.FileSystemDocument();
this.document = document;
this.TextBox.Text = this.document.Text;
this.Text = "Notepad--";
this.StatusLabel.Text = "New file";
this.TextBox.BackColor = this.document.BackColor;
this.TextBox.ForeColor = this.document.TextColor;
this.TextBox.Font = this.document.Font;
}