ComboBoxRenderer.DrawTextBox Methode

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, state As ComboBoxState)

Parameter

Ausnahmen

Hinweise

Bevor Sie diese Methode aufrufen, sollten Sie überprüfen, ob die IsSupported Eigenschaft zurückgegeben wird true.

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string comboBoxText, System.Drawing.Font font, System.Windows.Forms.VisualStyles.ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, state As ComboBoxState)

Parameter

Ausnahmen

Hinweise

Bevor Sie diese Methode aufrufen, sollten Sie überprüfen, ob die IsSupported Eigenschaft zurückgegeben wird true.

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Drawing::Rectangle textBounds, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string comboBoxText, System.Drawing.Font font, System.Drawing.Rectangle textBounds, System.Windows.Forms.VisualStyles.ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Drawing.Rectangle textBounds, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Drawing.Rectangle * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, textBounds As Rectangle, state As ComboBoxState)

Parameter

Ausnahmen

Beispiele

Im folgenden Codebeispiel wird die DrawTextBox(Graphics, Rectangle, String, Font, ComboBoxState) Methode in der Methode eines benutzerdefinierten Steuerelements OnPaint verwendet, um ein Textfeld zu zeichnen. Dieses Codebeispiel ist Teil eines größeren Beispiels, das für die ComboBoxRenderer Klasse bereitgestellt wird.

      // Draw the combo box in the current state.
protected:
    virtual void OnPaint(PaintEventArgs^ e) override 
    {
        Control::OnPaint(e);

        if (!ComboBoxRenderer::IsSupported)
        {
            this->Parent->Text = "Visual Styles Disabled";
            return;
        }

        this->Parent->Text = "CustomComboBox Enabled";

        // Always draw the main text box and drop down arrow in their
        // current states
        ComboBoxRenderer::DrawTextBox(e->Graphics, topTextBoxRectangle,
            this->Text, this->Font, textBoxState);
        ComboBoxRenderer::DrawDropDownButton(e->Graphics, arrowRectangle,
            arrowState);

        // Only draw the bottom text box if the arrow has been clicked
        if (isActivated)
        {
            ComboBoxRenderer::DrawTextBox(e->Graphics,
                bottomTextBoxRectangle, bottomText, this->Font,
                textBoxState);
        }
    }

protected:
    virtual void OnMouseDown(MouseEventArgs^ e) override 
    {
        Control::OnMouseDown(e);

        // Check whether the user clicked the arrow.
        if (arrowRectangle.Contains(e->Location) &&
            ComboBoxRenderer::IsSupported)
        {
            // Draw the arrow in the pressed state.
            arrowState = ComboBoxState::Pressed;

            // The user has activated the combo box.
            if (!isActivated)
            {
                this->Text = "Clicked!";
                textBoxState = ComboBoxState::Pressed;
                isActivated = true;
            }

            // The user has deactivated the combo box.
            else
            {
                this->Text = "Click here";
                textBoxState = ComboBoxState::Normal;
                isActivated = false;
            }

            // Redraw the control.
            Invalidate();
        }
    }

// Draw the combo box in the current state.
protected override void OnPaint(PaintEventArgs e)
{
    base.OnPaint(e);

    if (!ComboBoxRenderer.IsSupported)
    {
        this.Parent.Text = "Visual Styles Disabled";
        return;
    }

    this.Parent.Text = "CustomComboBox Enabled";

    // Always draw the main text box and drop down arrow in their 
    // current states
    ComboBoxRenderer.DrawTextBox(e.Graphics, topTextBoxRectangle,
        this.Text, this.Font, textBoxState);
    ComboBoxRenderer.DrawDropDownButton(e.Graphics, arrowRectangle,
        arrowState);

    // Only draw the bottom text box if the arrow has been clicked
    if (isActivated)
    {
        ComboBoxRenderer.DrawTextBox(e.Graphics,
            bottomTextBoxRectangle, bottomText, this.Font,
            textBoxState);
    }
}

protected override void OnMouseDown(MouseEventArgs e)
{
    base.OnMouseDown(e);

    // Check whether the user clicked the arrow.
    if (arrowRectangle.Contains(e.Location) &&
        ComboBoxRenderer.IsSupported)
    {
        // Draw the arrow in the pressed state.
        arrowState = ComboBoxState.Pressed;

        // The user has activated the combo box.
        if (!isActivated)
        {
            this.Text = "Clicked!";
            textBoxState = ComboBoxState.Pressed;
            isActivated = true;
        }

        // The user has deactivated the combo box.
        else
        {
            this.Text = "Click here";
            textBoxState = ComboBoxState.Normal;
            isActivated = false;
        }

        // Redraw the control.
        Invalidate();
    }
}

' Draw the combo box in the current state.
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
    MyBase.OnPaint(e)

    If Not ComboBoxRenderer.IsSupported Then
        Me.Parent.Text = "Visual Styles	Disabled"
        Return
    End If

    Me.Parent.Text = "CustomComboBox Enabled"

    ' Always draw the main text box and drop down arrow in their 
    ' current states.
    ComboBoxRenderer.DrawTextBox(e.Graphics, topTextBoxRectangle, _
        Me.Text, Me.Font, textBoxState)
    ComboBoxRenderer.DrawDropDownButton(e.Graphics, arrowRectangle, _
        arrowState)

    ' Only draw the bottom text box if the arrow has been clicked.
    If isActivated Then
        ComboBoxRenderer.DrawTextBox(e.Graphics, _
            bottomTextBoxRectangle, bottomText, Me.Font, textBoxState)
    End If
End Sub

Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
    MyBase.OnMouseDown(e)

    ' Check whether the user clicked the arrow.
    If arrowRectangle.Contains(e.Location) And _
        ComboBoxRenderer.IsSupported Then

        ' Draw the arrow in the pressed state.
        arrowState = ComboBoxState.Pressed

        ' The user has activated the combo box.
        If Not isActivated Then
            Me.Text = "Clicked!"
            textBoxState = ComboBoxState.Pressed
            isActivated = True

        ' The user has deactivated the combo box.
        Else
            Me.Text = "Click here"
            textBoxState = ComboBoxState.Normal
            isActivated = False
        End If

        ' Redraw the control.
        Invalidate()
    End If
End Sub

Hinweise

Bevor Sie diese Methode aufrufen, sollten Sie überprüfen, ob die IsSupported Eigenschaft zurückgegeben wird true.

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Windows::Forms::TextFormatFlags flags, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string comboBoxText, System.Drawing.Font font, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Windows.Forms.TextFormatFlags * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, flags As TextFormatFlags, state As ComboBoxState)

Parameter

Ausnahmen

Hinweise

Bevor Sie diese Methode aufrufen, sollten Sie überprüfen, ob die IsSupported Eigenschaft zurückgegeben wird true.

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Drawing::Rectangle textBounds, System::Windows::Forms::TextFormatFlags flags, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string comboBoxText, System.Drawing.Font font, System.Drawing.Rectangle textBounds, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Drawing.Rectangle textBounds, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Drawing.Rectangle * System.Windows.Forms.TextFormatFlags * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, textBounds As Rectangle, flags As TextFormatFlags, state As ComboBoxState)

Parameter

Ausnahmen

Hinweise

Bevor Sie diese Methode aufrufen, sollten Sie überprüfen, ob die IsSupported Eigenschaft zurückgegeben wird true.