![[Part3]C# - TextEditor (Windows Form)](https://www.elitepvpers.com/forum/iconimages/co2-programming/part3-c-texteditor-windows-form_ltr.gif){kind=small}
First create a windowsformapplication.
Make sure you name it:
TextEditor
Now delete the "Form1.cs".
Now right click at your solution and choose:
Add > Windows Form
Make the name:
TextEditor
Now make the design fit into what you want.
Now create 3 buttons.
Now double click at them all.Quote:
Button1 Name: btnLoadFile
Button1 Text: Load File
Button2 Name: btnSaveFile
Button2 Text: Save File
Button3 Name Button3
Button3 Text: New File
So you will get 3 codes.
Now we will need the new project button to create new project.
We will do it, so it close the old and opens a new.
Just inside Button3 make it opens it again and close it.
You can do it like this:
At top find using System.Windows.Forms;
under it paste:
Code:
using System.Diagnostics; using System.Threading;
Code:
private void button3_Click(object sender, EventArgs e)
{
MessageBox.Show("The latest project will now not be save."); //Will send a message box before creating new project
System.Diagnostics.Process.Start("C:/"); //The path of the run for program
Thread.Sleep(200); //Letting this methode sleep, so it have time to open the new
Application.Exit(); //Closing the first program
}
Okay now for making it load a file.
First you will need to make a textbox.
Make it fit into what you want.
Call it:
txtFileContent
Then make the Anchor:
Top, Bottom, Left, Right
And change the font to:
Consolas; 8pt
You can also change the text color.
But is not realyl important.
Make scrollbars:
Both
if you want text to be there at start, just find "text".
And edit it to what you want.
Now double click at your load button.
Then find:
Code:
public partial class TextEditor : Form
Code:
private string _fileName;
private FileSystemWatcher _fileMonitor;
private bool _wasChanged;
private bool _wasRenamed;
private bool _wasCreated;
public delegate void LoadContentCallback();
Code:
namespace TextEditor
{
public partial class TextEditor : Form
{
private string _fileName;
private FileSystemWatcher _fileMonitor;
private bool _wasChanged;
private bool _wasRenamed;
private bool _wasCreated;
public delegate void LoadContentCallback();
with:
Code:
public TextEditor()
{
InitObjects();
InitializeComponent();
}
This should be the sub for it:
private void btnLoadFile_Click(object sender, EventArgs e)
It should already be there.
Find it.
We just want it to open the load file thing.
Is called OpenFileDialog.
It could be used like this:
Code:
private void btnLoadFile_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.CheckFileExists = true;
ofd.Multiselect = false;
DialogResult result = ofd.ShowDialog();
if (result == DialogResult.OK)
{
_fileName = ofd.FileName;
if (_fileName != string.Empty)
LoadFileContent();
}
}
So below this you will need to make a content.
It could look like this:
Code:
private void LoadFileContent()
{
lblFileName.Text = Path.GetFileName(_fileName);
try
{
TextReader tr = new StreamReader(_fileName);
try
{ txtFileContent.Text = tr.ReadToEnd(); }
catch (Exception ex)
{ MessageBox.Show(ex.Message); }
finally
{
tr.Close();
StartMonitorization();
}
}
catch (FileNotFoundException ex)
{ MessageBox.Show("Sorry, the file does not exist."); }
catch (UnauthorizedAccessException ex)
{ MessageBox.Show("Sorry, you lack sufficient privileges."); }
catch (Exception ex)
{ MessageBox.Show(ex.Message); }
}
To check for file changes.
It can be done like this:
Code:
private void StartMonitorization()
{
_fileMonitor = new FileSystemWatcher(Path.GetDirectoryName(_fileName), Path.GetFileName(_fileName))
{
NotifyFilter = NotifyFilters.FileName | NotifyFilters.LastWrite,
IncludeSubdirectories = false
};
_fileMonitor.Changed += FileMonitor_OnChanged;
_fileMonitor.Created += FileMonitor_OnChanged;
_fileMonitor.Deleted += FileMonitor_OnDeleted;
_fileMonitor.Renamed += FileMonitor_OnRenamed;
_fileMonitor.EnableRaisingEvents = true;
}
Code:
private void StartMonitorization()
{
_fileMonitor = new FileSystemWatcher(Path.GetDirectoryName(_fileName), Path.GetFileName(_fileName))
{
NotifyFilter = NotifyFilters.FileName | NotifyFilters.LastWrite,
IncludeSubdirectories = false
};
_fileMonitor.Changed += FileMonitor_OnChanged;
_fileMonitor.Created += FileMonitor_OnChanged;
_fileMonitor.Deleted += FileMonitor_OnDeleted;
_fileMonitor.Renamed += FileMonitor_OnRenamed;
_fileMonitor.EnableRaisingEvents = true;
}
private void FileMonitor_OnRenamed(object sender, RenamedEventArgs e)
{
if (!_wasRenamed)
{
DialogResult result = MessageBox.Show("The file " + e.OldName + " was renamed. \r\n" +
"Do you want to load the new file ?", "File was renamed", MessageBoxButtons.OKCancel);
_wasRenamed = true;
if (result == DialogResult.OK)
{
_fileName = e.FullPath;
this.BeginInvoke(new LoadContentCallback(LoadFileContent));
}
}
else
{
_wasRenamed = false;
}
}
private void FileMonitor_OnDeleted(object sender, FileSystemEventArgs e)
{
DialogResult result = MessageBox.Show("The file " + e.Name + " was deleted. \r\n" +
"Do you want to remove it from text editor ?", "File was deleted",
MessageBoxButtons.YesNo);
if (result == DialogResult.Yes)
{
_fileMonitor.Dispose();
this.BeginInvoke(new LoadContentCallback(ResetUiContent));
}
}
private void FileMonitor_OnChanged(object sender, FileSystemEventArgs e)
{
if ((!_wasCreated && e.ChangeType == WatcherChangeTypes.Created) ||
(!_wasChanged && e.ChangeType == WatcherChangeTypes.Changed))
{
DialogResult result = MessageBox.Show("The content of the file " + e.Name + " was changed. \r\n" +
"Do you want to reload it ?", "File was changed",
MessageBoxButtons.OKCancel);
if (e.ChangeType == WatcherChangeTypes.Changed)
{
_wasChanged = true;
}
else
{
_wasCreated = true;
}
if (result == DialogResult.OK)
{
this.BeginInvoke(new LoadContentCallback(LoadFileContent));
}
}
else
{
if (e.ChangeType == WatcherChangeTypes.Changed && _wasChanged)
{
_wasChanged = false;
}
else if (e.ChangeType == WatcherChangeTypes.Created && _wasCreated)
{
_wasCreated = false;
}
}
}
private void ResetUiContent()
{
txtFileContent.Text = string.Empty;
lblFileName.Text = string.Empty;
_fileName = string.Empty;
}
Okay next step is to make it save our file.
Is also the last step.
Basicly is the same as the Load.
But this time it have to create a file.
And check for wich filetypes it supports.
(Look buttom for how to add more filetypes)
This could be used as the save button:
Code:
private void btnSaveFile_Click(object sender, EventArgs e)
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "C# files (*.cs)|*.cs|HTML Files (*.html)|*.html|DAT Files (*.dat)|*.dat|INI Files (*.ini)|*.ini";
saveFileDialog.SupportMultiDottedExtensions = true;
DialogResult result = saveFileDialog.ShowDialog();
if (result == DialogResult.OK)
{
_fileName = saveFileDialog.FileName;
if (!string.IsNullOrEmpty(_fileName))
SaveFileContent();
}
}
private void SaveFileContent()
{
lblFileName.Text = Path.GetFileName(_fileName);
try
{
// we'll make only a textual file for instance
TextWriter tw = File.CreateText(_fileName);
try
{
tw.Write(txtFileContent.Text);
}
catch (Exception ex)
{ MessageBox.Show(ex.Message); }
finally
{
tw.Close();
StartMonitorization();
}
}
catch (UnauthorizedAccessException ex)
{ MessageBox.Show("Fail. You lack sufficient privileges."); }
catch (Exception ex)
{ MessageBox.Show(ex.Message); }
}
private void TextEditor_KeyDown(object sender, KeyEventArgs e)
{
if (e.Modifiers == Keys.Control)
{
switch (e.KeyCode)
{
case Keys.S:
btnSaveFile_Click(btnSaveFile, null);
break;
case Keys.O:
btnLoadFile_Click(btnSaveFile, null);
break;
}
}
}
Open Program.cs
Find:
Code:
Application.Run(new Form1());
Code:
Application.Run(new TextEditor());
There is only 1 thing.
That will be showed as a warning or a note for you.
Is because is declared, but never used.
The line is:
Code:
catch (FileNotFoundException ex) catch (UnauthorizedAccessException ex) catch (UnauthorizedAccessException ex)
Don't give me credits for this.
I only took Code4Food's tutorial and fixed some things on it.
In part4 We will look at:
Browser inside Windows Form.
It works fine, there shouldn't be any problems.
If there still is problems, make a reply or PM me.
-------------------------------
Final script:
TextEditor.cs:
Program.cs
Design:
