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CommonDialog Class

Specifies the base class used for displaying dialog boxes on the screen.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public abstract class CommonDialog : Component
public abstract class CommonDialog extends Component
public abstract class CommonDialog extends Component

Inherited classes are required to implement RunDialog by invoking ShowDialog to create a specific common dialog box. Inherited classes can optionally override HookProc to implement specific dialog box hook functionality.

The following code example uses the ColorDialog implementation of CommonDialog and illustrates creating and showing a dialog box. This example requires that the method is called from within an existing form, which has a TextBox and Button placed on it.

private void button1_Click(object sender, System.EventArgs e)
 {
    ColorDialog MyDialog = new ColorDialog();
    // Keeps the user from selecting a custom color.
    MyDialog.AllowFullOpen = false ;
    // Allows the user to get help. (The default is false.)
    MyDialog.ShowHelp = true ;
    // Sets the initial color select to the current text color.
    MyDialog.Color = textBox1.ForeColor ;
    
    // Update the text box color if the user clicks OK 
    if (MyDialog.ShowDialog() == DialogResult.OK)
        textBox1.ForeColor =  MyDialog.Color;
 }
    

protected void button1_Click(Object sender, System.EventArgs e)
{
    ColorDialog myDialog = new ColorDialog();
    // Keeps the user from selecting a custom color.
    myDialog.set_AllowFullOpen(false);
    // Allows the user to get help. (The default is false.)
    myDialog.set_ShowHelp(true);
    // Sets the initial color select to the current text color.
    myDialog.set_Color(textBox1.get_ForeColor());
    // Update the text box color if the user clicks OK 
    if (myDialog.ShowDialog().Equals(get_DialogResult().OK)) {
        textBox1.set_ForeColor(myDialog.get_Color());
    }
} //button1_Click

System.Object
   System.MarshalByRefObject
     System.ComponentModel.Component
      System.Windows.Forms.CommonDialog
         Derived Classes

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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