C＃标签控制左与图象

Question

水平对齐我按照在MSDN网站上的说明： https://msdn.microsoft.com/en-us/library/vstudio/ms404305%28v=vs.100%29.aspx 来显示选项卡控制，如下图：

而这是代码：

private void tcMain_DrawItem(Object sender, DrawItemEventArgs e) 
{ 
    Graphics g = e.Graphics; 
    Brush _textBrush; 

    TabPage _tabPage = tcMain.TabPages[e.Index]; 
    Rectangle _tabBounds = tcMain.GetTabRect(e.Index); 

    if (e.State == DrawItemState.Selected) 
    { 
     _textBrush = new SolidBrush(Color.Red); 
     g.FillRectangle(Brushes.Gray, e.Bounds); 
    } 
    else 
    { 
     _textBrush = new System.Drawing.SolidBrush(e.ForeColor); 
     e.DrawBackground(); 
    } 

    Font _tabFont = new Font("Times New Roman", (float)22, FontStyle.Regular, GraphicsUnit.Pixel); 

    StringFormat _stringFlags = new StringFormat(); 
    _stringFlags.Alignment = StringAlignment.Near; 
    _stringFlags.LineAlignment = StringAlignment.Center; 
    g.DrawString(_tabPage.Text, _tabFont, _textBrush, _tabBounds, new StringFormat(_stringFlags)); 
} 

现在我想添加一个图片到选项卡控制按钮的左侧？我的意思是，如何在单词Book的左侧显示图片，例如？

从下面尝试一些答案后，我结束了与代码：

private void tcMain_DrawItem(Object sender, DrawItemEventArgs e) 
    { 
     Graphics g = e.Graphics; 
     Brush _textBrush; 

     TabPage _tabPage = tcMain.TabPages[e.Index]; 
     Rectangle _tabBounds = tcMain.GetTabRect(e.Index); 

     if (e.State == DrawItemState.Selected) 
     { 
      _textBrush = new SolidBrush(Color.Red); 
      g.FillRectangle(Brushes.Gray, e.Bounds); 
     } 
     else 
     { 
      _textBrush = new System.Drawing.SolidBrush(e.ForeColor); 
      e.DrawBackground(); 
     } 

     tcMain.ImageList = imgList; 
     tcMain.TabPages[0].ImageIndex = 1; 
     tcMain.TabPages[1].ImageIndex = 0; 
     tcMain.TabPages[2].ImageIndex = 3; 
     tcMain.TabPages[3].ImageIndex = 2; 

     Rectangle tabImage = tcMain.GetTabRect(e.Index); 
     tabImage.Size = new Size(40, 40); 

     g.DrawImage(tcMain.ImageList.Images[_tabPage.ImageIndex], tabImage); 

     Font _tabFont = new Font("Times New Roman", (float)22, FontStyle.Regular, GraphicsUnit.Pixel); 

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

后来，当我拍摄快照的结果时，就这样产生了：

刷新所有的时间

Answer 1

你可以添加一个ImageList控制到你的p roject并添加一些图像，并设置您的TabPages的ImageIndex属性。然后在DrawItem事件中使用DrawImage()方法。

Rectangle tabImage = tcMain.GetTabRect(e.Index); 
tabImage.Size = new Size(16, 16); 

g.DrawImage(tcMain.ImageList.Images[_tabPage.ImageIndex], tabImage); 

你也可以使用ImageKey代替ImageIndex。

g.DrawImage(tcMain.ImageList.Images[_tabPage.ImageKey], tabImage); 

如果添加ImageList和ImageIndex编程来看看：

ImageList imageList = new ImageList(); 
imageList.Images.Add("key1", Image.FromFile("pathtofile")); 
imageList.Images.Add("key2", Image.FromFile("pathtofile")); 

tcMain.ImageList = imageList; 
tcMain.TabPages[0].ImageIndex = 1; 
tcMain.TabPages[1].ImageIndex = 0;