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MessageBox.Show Method (IWin32Window, String, String, MessageBoxButtons, MessageBoxIcon, MessageBoxDefaultButton, MessageBoxOptions)

Displays a message box in front of the specified object and with the specified text, caption, buttons, icon, default button, and options.

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

public static DialogResult Show (
	IWin32Window owner,
	string text,
	string caption,
	MessageBoxButtons buttons,
	MessageBoxIcon icon,
	MessageBoxDefaultButton defaultButton,
	MessageBoxOptions options
)
public static DialogResult Show (
	IWin32Window owner, 
	String text, 
	String caption, 
	MessageBoxButtons buttons, 
	MessageBoxIcon icon, 
	MessageBoxDefaultButton defaultButton, 
	MessageBoxOptions options
)
public static function Show (
	owner : IWin32Window, 
	text : String, 
	caption : String, 
	buttons : MessageBoxButtons, 
	icon : MessageBoxIcon, 
	defaultButton : MessageBoxDefaultButton, 
	options : MessageBoxOptions
) : DialogResult
Not applicable.

Parameters

owner
text
caption
buttons
icon
defaultButton

One of the MessageBoxDefaultButton values the specifies the default button for the message box.

options

Return Value

One of the DialogResult values.

Exception typeCondition

InvalidEnumArgumentException

buttons is not a member of MessageBoxButtons.

-or-

icon is not a member of MessageBoxIcon.

-or-

defaultButton is not a member of MessageBoxDefaultButton.

InvalidOperationException

An attempt was made to display the MessageBox in a process that is not running in User Interactive mode. This is specified by the SystemInformation.UserInteractive property.

ArgumentException

options specified both DefaultDesktopOnly and ServiceNotification.

-or-

options specified DefaultDesktopOnly or ServiceNotification and specified a value in the owner parameter. These two options should be used only if you invoke the version of this method that does not take an owner parameter.

-or-

buttons specified an invalid combination of MessageBoxButtons.

You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner. A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

You can have a maximum of three buttons on the message box.

The following code example demonstrates how to display a MessageBox with the options supported by this overload of Show. After verifying that a string variable, ServerName, is empty, the example displays a MessageBox, offering the user the option to cancel the operation. If the Show method's return value evaluates to Yes, the form that displayed the MessageBox is closed.


private void validateUserEntry2()
{

    // Checks the value of the text.

    if(serverName.Text.Length == 0)
    {

        // Initializes the variables to pass to the MessageBox.Show method.

        string message = "You did not enter a server name. Cancel this operation?";
        string caption = "No Server Name Specified";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;

        // Displays the MessageBox.

        result = MessageBox.Show(this, message, caption, buttons,
            MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, 
            MessageBoxOptions.RightAlign);

        if(result == DialogResult.Yes)
        {

            // Closes the parent form.

            this.Close();

        }

    }

}


private void ValidateUserEntry2()
{
    // Checks the value of the text.
    if (serverName.get_Text().get_Length() == 0) {
        // Initializes the variables to pass to the MessageBox.Show method.
        String message = "You did not enter a server name. "
            + "Cancel this operation?";
        String caption = "No Server Name Specified";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;

        // Displays the MessageBox.
        result = MessageBox.Show(this, message, caption, buttons, 
            MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, 
            MessageBoxOptions.RightAlign);

        if (result.Equals(DialogResult.Yes)) {
            // Closes the parent form.
            this.Close();
        }
    }
} //ValidateUserEntry2

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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