Windows Forms C# TabControl ImageList Alignment?

问题:

Is it possible to align the image icon from on a TabControl's ImageList to the right of the text?

Right now, the image icon gets put on the left, and the text is to the right of that. I would prefer the text to be on the left, and the icon to the right of that. Is this possible?

回答1:

You can not do that unless you Draw the TabPage yourself. To do that you need to set the DrawMode property of the TabControl to OwnerDrawFixed and then handle the DrawItem Event.
This is a very simple example to do that, you can add some code to change the background color of the selected tab if you wish, to know which tab is selected just check the e.State value:

private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
    // values
    TabControl tabCtrl = (TabControl)sender;
    Brush fontBrush = Brushes.Black;
    string title = tabCtrl.TabPages[e.Index].Text;
    StringFormat sf = new StringFormat();
    sf.Alignment = StringAlignment.Near;
    sf.LineAlignment = StringAlignment.Center;
    int indent = 3;
    Rectangle rect = new Rectangle(e.Bounds.X, e.Bounds.Y + indent, e.Bounds.Width, e.Bounds.Height - indent);

    // draw title
    e.Graphics.DrawString(title, tabCtrl.Font, fontBrush, rect, sf);

    // draw image if available
    if (tabCtrl.TabPages[e.Index].ImageIndex >= 0)
    {
        Image img = tabCtrl.ImageList.Images[tabCtrl.TabPages[e.Index].ImageIndex];
        float _x = (rect.X + rect.Width) - img.Width - indent;
        float _y = ((rect.Height - img.Height) / 2.0f) + rect.Y;
        e.Graphics.DrawImage(img, _x, _y);
    }
}