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MessageBox.Show Method (String, String, MessageBoxButtons)

.NET Framework 1.1

Displays a message box with specified text, caption, and buttons.

[Visual Basic]
Overloads Public Shared Function Show( _
   ByVal text As String, _
   ByVal caption As String, _
   ByVal buttons As MessageBoxButtons _
) As DialogResult
[C#]
public static DialogResult Show(
 string text,
 string caption,
 MessageBoxButtons buttons
);
[C++]
public: static DialogResult Show(
 String* text,
 String* caption,
 MessageBoxButtons buttons
);
[JScript]
public static function Show(
   text : String,
 caption : String,
 buttons : MessageBoxButtons
) : DialogResult;

Parameters

text
The text to display in the message box.
caption
The text to display in the title bar of the message box.
buttons
One of the MessageBoxButtons values that specifies which buttons to display in the message box.

Return Value

One of the DialogResult values.

Exceptions

Exception Type Condition
InvalidEnumArgumentException The buttons parameter specified is not a member of MessageBoxButtons.
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.

Remarks

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

Example

[Visual Basic, C#, C++] The following 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.

[Visual Basic] 
Private Sub ValidateUserEntry()

    ' Checks the value of the text.

    If ServerName.Text.Length = 0 Then

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

        Dim Message As String = "You did not enter a server name. Cancel this operation?"
        Dim Caption As String = "No Server Name Specified"
        Dim Buttons As MessageBoxButtons = MessageBoxButtons.YesNo

        Dim Result As DialogResult

        'Displays the MessageBox

        Result = MessageBox.Show(Me, Message, Caption, Buttons)

        ' Gets the result of the MessageBox display.

        If Result = DialogResult.Yes Then

            ' Closes the parent form.

            Me.Close()

        End If

    End If

End Sub

[C#] 

    private void validateUserEntry()
    {

        // 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);

            if(result == DialogResult.Yes)
            {

                // Closes the parent form.

                this.Close();

            }

        }

    }


[C++] 
private:
    void validateUserEntry() {
        // Checks the value of the text.
        if (serverName->Text->Length == 0) {

            // Initializes the variables to pass to the MessageBox::Show method.
            String* message = S"You did not enter a server name. Cancel this operation?";
            String* caption = S"No Server Name Specified";
            MessageBoxButtons buttons = MessageBoxButtons::YesNo;
            System::Windows::Forms::DialogResult result;

            // Displays the MessageBox.
            result = MessageBox::Show(this, message, caption, buttons);

            if (result == DialogResult::Yes) {
                // Closes the parent form.
                this->Close();
            }
        }
    }

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

See Also

MessageBox Class | MessageBox Members | System.Windows.Forms Namespace | MessageBox.Show Overload List | MessageBoxButtons

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