tabControl中的關閉按鈕

Question

有沒有人可以告訴我如何在C＃中使用tabControl的每個選項卡中添加關閉按鈕？ 我打算使用按鈕PIC在我的標籤替換[X] ..

謝謝

Answer 1

沒有派生一個類，這裏​​是一個整潔的片段： http://www.dotnetthoughts.net/implementing-close-button-in-tab-pages/

設置的DrawMode屬性選項卡控制爲OwnerDrawFixed。此屬性決定系統還是開發人員繪製字幕。 將代碼添加到選項卡控件的DrawItem事件中 - 將調用此事件來繪製每個選項卡頁面。

//This code will render a "x" mark at the end of the Tab caption. 
e.Graphics.DrawString("x", e.Font, Brushes.Black, e.Bounds.Right - 15, e.Bounds.Top + 4); 
e.Graphics.DrawString(this.tabControl1.TabPages[e.Index].Text, e.Font, Brushes.Black, e.Bounds.Left + 12, e.Bounds.Top + 4); 
e.DrawFocusRectangle(); 

現在要關閉按鈕操作，我們需要將下面的代碼添加到Tab控件的MouseDown事件中。

//Looping through the controls. 
for (int i = 0; i < this.tabControl1.TabPages.Count; i++) 
{ 
    Rectangle r = tabControl1.GetTabRect(i); 
    //Getting the position of the "x" mark. 
    Rectangle closeButton = new Rectangle(r.Right - 15, r.Top + 4, 9, 7); 
    if (closeButton.Contains(e.Location)) 
    { 
     if (MessageBox.Show("Would you like to Close this Tab?", "Confirm", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes) 
     { 
      this.tabControl1.TabPages.RemoveAt(i); 
      break; 
     } 
    } 
} 

Answer 2

添加到其他的答案......爲什麼迭代通過鼠標點擊事件的所有標籤時，我們可以只檢測與.SelectedIndex和.SelectedTab當前選項卡？

像這樣：

private void tabControl1_MouseDown(object sender, MouseEventArgs e) 
{ 
    Rectangle r = tabControl1.GetTabRect(this.tabControl1.SelectedIndex); 
    Rectangle closeButton = new Rectangle(r.Right - 15, r.Top + 4, 9, 7); 
    if (closeButton.Contains(e.Location)) 
    { 
     this.tabControl1.TabPages.Remove(this.tabControl1.SelectedTab); 
    } 
} 

什麼似乎是，你在一個標籤頁點擊關閉它的那一刻，它也被選中的情況發生，從而使關閉按鈕來關閉右標籤頁。 對我來說，它的工作原理，但請特別注意這一點，因爲我不完全確定可能的缺點（我的初始語句並不是一個完全修辭的問題，因爲我對.NET有點新鮮......）。

Answer 3

試試這個代碼：

private Point _imageLocation = new Point(13, 5); 
     private Point _imgHitArea = new Point(13, 2); 

     private void Form1_Load(object sender, EventArgs e) 
     { 
      tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed; 
    tabControl1.DrawItem += tabControl1_DrawItem; 
    CloseImage = WindowsFormsApplication3.Properties.Resources.closeR; 
    tabControl1.Padding = new Point(10, 3); 
     } 


    private void TabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e) 
     { 
      try 
      { 
       Image img = new Bitmap(CloseImage); 
       Rectangle r = e.Bounds; 
       r = this.tabControl1.GetTabRect(e.Index); 
       r.Offset(2, 2); 
       Brush TitleBrush = new SolidBrush(Color.Black); 
       Font f = this.Font; 
       string title = this.tabControl1.TabPages[e.Index].Text; 

       e.Graphics.DrawString(title, f, TitleBrush, new PointF(r.X, r.Y)); 

       if (tabControl1.SelectedIndex >= 1) 
       { 
        e.Graphics.DrawImage(img, new Point(r.X + (this.tabControl1.GetTabRect(e.Index).Width - _imageLocation.X), _imageLocation.Y)); 
       } 
      } 
      catch (Exception) { } 
     } 


private void TabControl1_Mouse_Click(object sender, System.Windows.Forms.DrawItemEventArgs e) 
{ 

TabControl tc = (TabControl)sender; 
Point p = e.Location; 
int _tabWidth = 0; 
_tabWidth = this.tabControl1.GetTabRect(tc.SelectedIndex).Width - (_imgHitArea.X); 
Rectangle r = this.tabControl1.GetTabRect(tc.SelectedIndex); 
r.Offset(_tabWidth, _imgHitArea.Y); 
r.Width = 16; 
r.Height = 16; 
if (tabControl1.SelectedIndex >= 1) 
{ 
    if (r.Contains(p)) 
    { 
     TabPage TabP = (TabPage)tc.TabPages[tc.SelectedIndex]; 
     tc.TabPages.Remove(TabP); 
    } 

} 
} 

看this代碼片段