Windows Controls

FontDialog In C#

A FontDialog control in WinForms is used to select a font from available fonts installed on a system.

A typical Font Dialog looks like Figure 1 where you can see there is a list of fonts, styles, size and other options. Please note a FontDialog may have different fonts on different system depending on what fonts are installed on a system.

FontDialog Properties
Figure 1. 

FontDialog

We can create a FontDialog control using a Forms designer at design-time or using the FontDialog class in code at run-time (also known as dynamically). Unlike other Windows Forms controls, a FontDialog does not have and not need visual properties like others. You use a FontDialog to list all the fonts and select one of them and usually apply selected fonts on controls or some contents.

Note
Even though you can create a FontDialog at design-time as well as at run-time, I recommend using run-time method.

Design-time

To create a FontDialog control at design-time, you simply drag and drop a FontDialog control from Toolbox to a Form in Visual Studio. After you drag and drop a FontDialog on a Form, the FontDialog looks like Figure 2.

FontDialog control
Figure 2. 

Adding a FontDialog to a Form adds following two lines of code.
  1. private System.Windows.Forms.FontDialog fontDialog1;  
  2. this.fontDialog1 = new System.Windows.Forms.FontDialog();  
Run-time

Creating a FontDialog control at run-time is merely a work of creating an instance of FontDialog class, setting its properties and adding FontDialog class to the Form controls.

First step to create a dynamic FontDialog is to create an instance of FontDialog class.

The following code snippet creates a FontDialog control object.
  1. FontDialog fontDlg = new FontDialog();  
ShowDialog method of FontDialog displays the FontDialog. The following code snippet calls the ShowDialog method.
  1. fontDlg.ShowDialog();  
Once the ShowDialog method is called, you can pick a font on the dialog.

FontDialog Properties - Show Properties

A FontDialog control can have a color drop down that allows users to select a color of the selected font. A FontDialog can also have Apply and Help buttons as you can see in Figure 3. 
 
FontDialog Properties
Figure 3
 
ShowColor, ShowApply, and ShowHelp properties can be set to true to show these options. The ShowEffects property represents whether the dialog box contains controls that allow the user to specify strikethrough, underline, and text color options.

The following code snippet sets these properties to true.
  1. fontDlg.ShowColor = true;  
  2. fontDlg.ShowApply = true;  
  3. fontDlg.ShowEffects = true;  
  4. fontDlg.ShowHelp = true;  
Maximum and Minimum Font Size

We can restrict the maximum and minimum font size by setting MaxSize and MinSize properties. The following code snippet sets these properties to 40 and 22 respectively.
  1. fontDlg.MaxSize = 40;  
  2. fontDlg.MinSize = 22;  
Font and Color

The Font and Color properties represent the selected font and color in a FontDialog. The following code snippet gets these properties and sets font and color of a TextBox and a Label controls.
  1. if (fontDlg.ShowDialog() != DialogResult.Cancel) {  
  2.     textBox1.Font = fontDlg.Font;  
  3.     label1.Font = fontDlg.Font;  
  4.     textBox1.BackColor = fontDlg.Color;  
  5.     label1.ForeColor = fontDlg.Color;  
  6. }  
Summary

A FontDialog control allows users to launch Windows Font Dialog and let them select a font and font color. In this article, we discussed how to use a Windows Font Dialog and set its properties in a Windows Forms application.

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