This code should allow a user to pick a font from a Font and set the text in txtDis- play to that font. Find the error(s) in the following code, assuming that a TextBox named txtDisplay exists on a Form, along with a MenuItem named mnuitmFont.
private void mnuitmFont_Click(
object sender, System.EventArgs e )
{
FontDialog dlgFontDialog;
dlgFontDialog = new FontDialog();
dlgFontDialog.ShowDialog();
txtDisplay.Font = dlgFontDialog.Font;
} // end method mnuitmFont_Click
The code should check whether the use clicked the Cancel Button in the dialog. If
the user clicked Cancel, the method should be terminated. If the user did not click Cancel, the text should be set to the selected style. The complete incorrect code reads:
// FontChange.cs (Incorrect)
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace FontChange
{
///
/// Summary description for FrmFontChange.
///
public class FrmFontChange : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox txtDisplay;
private System.Windows.Forms.Label lblSample;
private System.Windows.Forms.MainMenu mnuMain;
private System.Windows.Forms.MenuItem menuItem1;
private System.Windows.Forms.MenuItem mnuitmFont;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public FrmFontChange()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent
// call
//
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
// Windows Form Designer generated code
///
/// The main entry point for the application.
///
[STAThread]
static void Main()
{
Application.Run( new FrmFontChange() );
}
// changes the font of the Form's TextBox
private void mnuitmFont_Click(
object sender, System.EventArgs e )
{
FontDialog dlgFontDialog;
dlgFontDialog = new FontDialog();
dlgFontDialog.ShowDialog();
txtDisplay.Font = dlgFontDialog.Font;
} // end method mnuitmFont_Click
} // end class FrmFontChange
}
The complete corrected code should read:
// FontChange.cs (Correct)
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace FontChange
{
///
/// Summary description for FrmFontChange.
///
public class FrmFontChange : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox txtDisplay;
private System.Windows.Forms.Label lblSample;
private System.Windows.Forms.MainMenu mnuMain;
private System.Windows.Forms.MenuItem menuItem1;
private System.Windows.Forms.MenuItem mnuitmFont;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public FrmFontChange()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent
// call
//
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
// Windows Form Designer generated code
///
/// The main entry point for the application.
///
[STAThread]
static void Main()
{
Application.Run( new FrmFontChange() );
}
// changes the font of the Form's TextBox
private void mnuitmFont_Click(
object sender, System.EventArgs e )
{
DialogResult result;
FontDialog dlgFontDialog;
dlgFontDialog = new FontDialog();
result = dlgFontDialog.ShowDialog();
if ( result == DialogResult.Cancel )
{
return;
}
else
{
txtDisplay.Font = dlgFontDialog.Font;
}
} // end method mnuitmFont_Click
} // end class FrmFontChange
}
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