Form.DialogResult Property (System.Windows.Forms)

DialogResult Property

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Microsoft Visual Studio 2010/.NET Framework 4

Other versions are also available for the following:

.NET Framework Class Library

Form..::.DialogResult Property

Gets or sets the dialog result for the form.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)

Syntax

Visual Basic

<BrowsableAttribute(False)> _
Public Property DialogResult As DialogResult

[BrowsableAttribute(false)]
public DialogResult DialogResult { get; set; }

Visual C++

[BrowsableAttribute(false)]
public:
property DialogResult DialogResult {
    DialogResult get ();
    void set (DialogResult value);
}

[<BrowsableAttribute(false)>]
member DialogResult : DialogResult with get, set

Property Value

Type: System.Windows.Forms..::.DialogResult
A DialogResult that represents the result of the form when used as a dialog box.

Exceptions

Exception	Condition
InvalidEnumArgumentException	The value specified is outside the range of valid values.

Remarks

The dialog result of a form is the value that is returned from the form when it is displayed as a modal dialog box. If the form is displayed as a dialog box, setting this property with a value from the DialogResult enumeration sets the value of the dialog box result for the form, hides the modal dialog box, and returns control to the calling form. This property is typically set by the DialogResult property of a Button control on the form. When the user clicks the Button control, the value assigned to the DialogResult property of the Button is assigned to the DialogResult property of the form.

When a form is displayed as a modal dialog box, clicking the Close button (the button with an X in the top-right corner of the form) causes the form to be hidden and the DialogResult property to be set to DialogResult.Cancel. The Close method is not automatically called when the user clicks the Close button of a dialog box or sets the value of the DialogResult property. Instead, the form is hidden and can be shown again without creating a new instance of the dialog box. Because of this behavior, you must call the Dispose method of the form when the form is no longer needed by your application.

You can use this property to determine how a dialog box is closed in order to properly process the actions performed in the dialog box.

Note
You can override the value assigned to the DialogResult property when the user clicks the Close button by setting the DialogResult property in an event handler for the Closing event of the form.

Note
If a Form is displayed as a modeless window, the value returned by the DialogResult property might not return a value assigned to the form because the form's resources are automatically released when the form is closed.

Examples

The following code example displays a form as a dialog box and displays a message box indicating whether the OK or Cancel button of the form was clicked by referencing the DialogResult property of the form.

Visual Basic

Public Sub CreateMyForm()
    ' Create a new instance of the form.
    Dim form1 As New Form()
    ' Create two buttons to use as the accept and cancel buttons.
    Dim button1 As New Button()
    Dim button2 As New Button()

    ' Set the text of button1 to "OK".
    button1.Text = "OK"
    ' Set the position of the button on the form.
    button1.Location = New Point(10, 10)
    ' Set the text of button2 to "Cancel".
    button2.Text = "Cancel"
    ' Set the position of the button based on the location of button1.
    button2.Location = New Point(button1.Left, button1.Height + button1.Top + 10)
    ' Make button1's dialog result OK.
    button1.DialogResult = DialogResult.OK
    ' Make button2's dialog result Cancel.
    button2.DialogResult = DialogResult.Cancel
    ' Set the caption bar text of the form.   
    form1.Text = "My Dialog Box"

    ' Define the border style of the form to a dialog box.
    form1.FormBorderStyle = FormBorderStyle.FixedDialog
    ' Set the accept button of the form to button1.
    form1.AcceptButton = button1
    ' Set the cancel button of the form to button2.
    form1.CancelButton = button2
    ' Set the start position of the form to the center of the screen.
    form1.StartPosition = FormStartPosition.CenterScreen

    ' Add button1 to the form.
    form1.Controls.Add(button1)
    ' Add button2 to the form.
    form1.Controls.Add(button2)

    ' Display the form as a modal dialog box.
    form1.ShowDialog()

    ' Determine if the OK button was clicked on the dialog box.
    If form1.DialogResult = DialogResult.OK Then
        ' Display a message box indicating that the OK button was clicked.
        MessageBox.Show("The OK button on the form was clicked.")
        ' Optional: Call the Dispose method when you are finished with the dialog box.
        form1.Dispose
    ' Display a message box indicating that the Cancel button was clicked.
    Else
        MessageBox.Show("The Cancel button on the form was clicked.")
        ' Optional: Call the Dispose method when you are finished with the dialog box.
        form1.Dispose
    End If
End Sub 'CreateMyForm

public void CreateMyForm()
 {
    // Create a new instance of the form.
    Form form1 = new Form();
    // Create two buttons to use as the accept and cancel buttons.
    Button button1 = new Button ();
    Button button2 = new Button ();

    // Set the text of button1 to "OK".
    button1.Text = "OK";
    // Set the position of the button on the form.
    button1.Location = new Point (10, 10);
    // Set the text of button2 to "Cancel".
    button2.Text = "Cancel";
    // Set the position of the button based on the location of button1.
    button2.Location 
       = new Point (button1.Left, button1.Height + button1.Top + 10);
    // Make button1's dialog result OK.
    button1.DialogResult = DialogResult.OK;
    // Make button2's dialog result Cancel.
    button2.DialogResult = DialogResult.Cancel;
    // Set the caption bar text of the form.   
    form1.Text = "My Dialog Box";

    // Define the border style of the form to a dialog box.
    form1.FormBorderStyle = FormBorderStyle.FixedDialog;
    // Set the accept button of the form to button1.
    form1.AcceptButton = button1;
    // Set the cancel button of the form to button2.
    form1.CancelButton = button2;
    // Set the start position of the form to the center of the screen.
    form1.StartPosition = FormStartPosition.CenterScreen;

    // Add button1 to the form.
    form1.Controls.Add(button1);
    // Add button2 to the form.
    form1.Controls.Add(button2);

    // Display the form as a modal dialog box.
    form1.ShowDialog();

    // Determine if the OK button was clicked on the dialog box.
    if (form1.DialogResult == DialogResult.OK)
    {
       // Display a message box indicating that the OK button was clicked.
       MessageBox.Show("The OK button on the form was clicked.");
       // Optional: Call the Dispose method when you are finished with the dialog box.
       form1.Dispose();
    }
    else
    {
       // Display a message box indicating that the Cancel button was clicked.
       MessageBox.Show("The Cancel button on the form was clicked.");
       // Optional: Call the Dispose method when you are finished with the dialog box.
       form1.Dispose();
    }
 }

Visual C++

   void CreateMyForm()
   {

      // Create a new instance of the form.
      Form^ form1 = gcnew Form;

      // Create two buttons to use as the accept and cancel buttons.
      Button^ button1 = gcnew Button;
      Button^ button2 = gcnew Button;

      // Set the text of button1 to "OK".
      button1->Text = "OK";

      // Set the position of the button on the form.
      button1->Location = Point(10,10);

      // Set the text of button2 to "Cancel".
      button2->Text = "Cancel";

      // Set the position of the button based on the location of button1.
      button2->Location = Point(button1->Left,button1->Height + button1->Top + 10);

      // Make button1's dialog result OK.
      button1->DialogResult = ::DialogResult::OK;

      // Make button2's dialog result Cancel.
      button2->DialogResult = ::DialogResult::Cancel;

      // Set the caption bar text of the form.   
      form1->Text = "My Dialog Box";

      // Define the border style of the form to a dialog box.
      form1->FormBorderStyle = ::FormBorderStyle::FixedDialog;

      // Set the accept button of the form to button1.
      form1->AcceptButton = button1;

      // Set the cancel button of the form to button2.
      form1->CancelButton = button2;

      // Set the start position of the form to the center of the screen.
      form1->StartPosition = FormStartPosition::CenterScreen;

      // Add button1 to the form.
      form1->Controls->Add( button1 );

      // Add button2 to the form.
      form1->Controls->Add( button2 );

      // Display the form as a modal dialog box.
      form1->ShowDialog();

      // Determine if the OK button was clicked on the dialog box.
      if ( form1->DialogResult == ::DialogResult::OK )
      {

         // Display a message box indicating that the OK button was clicked.
         MessageBox::Show( "The OK button on the form was clicked." );

         // Optional: Call the Dispose method when you are finished with the dialog box.
         delete form1;
      }
      else
      {

         // Display a message box indicating that the Cancel button was clicked.
         MessageBox::Show( "The Cancel button on the form was clicked." );

         // Optional: Call the Dispose method when you are finished with the dialog box.
         delete form1;
      }
   }

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Reference

Form Class

System.Windows.Forms Namespace

DialogResult