c# - C# Winform：如何设置 TabControl（不是标签页）的基本颜色并使用图标

Question

我应用了用户提供的解决方案来解决问题，但它正在发生另一个问题。以前我拥有一个带有文本的图标，但在使用此处描述的代码后，我的图标不再出现。会是什么？

以及如何在使用不同于选项卡标题默认颜色的颜色时使用该图标？

我使用的解决方案是：

private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
        {

            TabPage CurrentTab = tabControl1.TabPages[e.Index];
            Rectangle ItemRect = tabControl1.GetTabRect(e.Index);
            SolidBrush FillBrush = new SolidBrush(Color.Red);
            SolidBrush TextBrush = new SolidBrush(Color.White);
            StringFormat sf = new StringFormat();
            sf.Alignment = StringAlignment.Center;
            sf.LineAlignment = StringAlignment.Center;

            //If we are currently painting the Selected TabItem we'll
            //change the brush colors and inflate the rectangle.
            if (System.Convert.ToBoolean(e.State & DrawItemState.Selected))
            {
                FillBrush.Color = Color.White;
                TextBrush.Color = Color.Red;
                ItemRect.Inflate(2, 2);
            }

            //Set up rotation for left and right aligned tabs
            if (tabControl1.Alignment == TabAlignment.Left || tabControl1.Alignment == TabAlignment.Right)
            {
                float RotateAngle = 90;
                if (tabControl1.Alignment == TabAlignment.Left)
                    RotateAngle = 270;
                PointF cp = new PointF(ItemRect.Left + (ItemRect.Width / 2), ItemRect.Top + (ItemRect.Height / 2));
                e.Graphics.TranslateTransform(cp.X, cp.Y);
                e.Graphics.RotateTransform(RotateAngle);
                ItemRect = new Rectangle(-(ItemRect.Height / 2), -(ItemRect.Width / 2), ItemRect.Height, ItemRect.Width);
            }

            //Next we'll paint the TabItem with our Fill Brush
            e.Graphics.FillRectangle(FillBrush, ItemRect);

            //Now draw the text.
            e.Graphics.DrawString(CurrentTab.Text, e.Font, TextBrush, (RectangleF)ItemRect, sf);

            //Reset any Graphics rotation
            e.Graphics.ResetTransform();


            //Finally, we should Dispose of our brushes.
            FillBrush.Dispose();
            TextBrush.Dispose();
        }

Answer 1

您还需要自己绘制图标。一个示例是在代码中绘制选项卡背景之后添加类似以下内容（我假设此处使用了图像列表）

int imageLeftOffset = 4;
Point imagePos = new Point(imageLeftOffset, ItemRect.Top + (ItemRect.Height - tabControl1.ImageList.ImageSize.Height + 1) / 2);
tabControl1.ImageList.Draw(e.Graphics, imagePos, CurrentTab.ImageIndex);  

您可能需要重新调整文本的绘制，以使文本和图像不重叠。