如何在C＃中使tabControl1.DrawItem為背景使用特定顏色？

Question

我按照此處的說明創建了一個側面對齊的標簽控件。 但是，如果我更改表單本身的背景顏色，則tabControl中將留有白色區域（參見圖片）。 如何使tabControl透明或匹配表單的顏色？

    public Form1()
    {
        InitializeComponent();
        tabControl1.DrawItem += new DrawItemEventHandler(tabControl1_DrawItem);
    }

    private void tabControl1_DrawItem(Object sender, System.Windows.Forms.DrawItemEventArgs e)
    {
        Graphics g = e.Graphics;
        Brush _textBrush;

        // Get the item from the collection.
        TabPage _tabPage = tabControl1.TabPages[e.Index];

        // Get the real bounds for the tab rectangle.
        Rectangle _tabBounds = tabControl1.GetTabRect(e.Index);

        if (e.State == DrawItemState.Selected)
        {

            // Draw a different background color, and don't paint a focus rectangle.
            _textBrush = new SolidBrush(Color.Red);
            g.FillRectangle(Brushes.Gray, e.Bounds);
        }
        else
        {
            _textBrush = new System.Drawing.SolidBrush(e.ForeColor);
            e.DrawBackground();
        }

        // Use our own font.
        Font _tabFont = new Font("Arial", (float)10.0, FontStyle.Bold, GraphicsUnit.Pixel);

        // Draw string. Center the text.
        StringFormat _stringFlags = new StringFormat();
        _stringFlags.Alignment = StringAlignment.Center;
        _stringFlags.LineAlignment = StringAlignment.Center;
        g.DrawString(_tabPage.Text, _tabFont, _textBrush, _tabBounds, new StringFormat(_stringFlags));
    }

Answer 1

在Windows窗體中，您可以停靠特定的錨點。 如果將點與父窗口對接，則應消除這些間隙。