C#利用tabControl控件实现多窗体嵌入及关闭

创建一个主窗体（Formmain）、两个副窗体（Form1,Form2）;在主窗体中分别添加一个menuStrip控件、tabControl控件,并在menu控件上添加一个主菜单和两个子菜单,如下图:

继而,选中tabControl控件属性修改 DrawMode = OwnerDrawFixed,再根据如下代码添加即可:
public void Add_TabPage(string str, Form myForm)
{
if (tabControlCheckHave(this.MainTabControl, str))
{
return;
}
else
{
MainTabControl.TabPages.Add(str);
MainTabControl.SelectTab(MainTabControl.TabPages.Count - 1);

myForm.FormBorderStyle = FormBorderStyle.None;
myForm.Dock = DockStyle.Fill;
myForm.TopLevel = false;
myForm.Show();
myForm.Parent = MainTabControl.SelectedTab;
}
}

public bool tabControlCheckHave(System.Windows.Forms.TabControl tab, String tabName)
{
for (int i = 0; i < tab.TabCount; i++)
{
if (tab.TabPages[i].Text == tabName)
{
tab.SelectedIndex = i;
return true;
}
}
return false;
}
private void form1ToolStripMenuItem_Click(object sender, EventArgs e)
{
Form1 f1= new Form1();
Add_TabPage("f1中华人民共和国窗体 ", f1);
}

private void form2ToolStripMenuItem_Click(object sender, EventArgs e)
{
Form2 f2 = new Form2();
Add_TabPage("f2朝鲜窗体 ", f2);
}

private void MainTabControl_DrawItem(object sender, DrawItemEventArgs e)
{
/*如果将 DrawMode 属性设置为 OwnerDrawFixed，
则每当 TabControl 需要绘制它的一个选项卡时，它就会引发 DrawItem 事件*/
try
{
this.MainTabControl.TabPages[e.Index].BackColor = Color.LightBlue;
Rectangle tabRect = this.MainTabControl.GetTabRect(e.Index);
e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, SystemBrushes.ControlText, (float)(tabRect.X + 2), (float)(tabRect.Y + 2));
using (Pen pen = new Pen(Color.White))
{
tabRect.Offset(tabRect.Width - 15, 2);
tabRect.Width = 15;
tabRect.Height = 15;
e.Graphics.DrawRectangle(pen, tabRect);
}
Color color = (e.State == DrawItemState.Selected) ? Color.LightBlue : Color.White;
using (Brush brush = new SolidBrush(color))
{
e.Graphics.FillRectangle(brush, tabRect);
}
using (Pen pen2 = new Pen(Color.Red))
{
Point point = new Point(tabRect.X + 3, tabRect.Y + 3);
Point point2 = new Point((tabRect.X + tabRect.Width) - 3, (tabRect.Y + tabRect.Height) - 3);
e.Graphics.DrawLine(pen2, point, point2);
Point point3 = new Point(tabRect.X + 3, (tabRect.Y + tabRect.Height) - 3);
Point point4 = new Point((tabRect.X + tabRect.Width) - 3, tabRect.Y + 3);
e.Graphics.DrawLine(pen2, point3, point4);
}
e.Graphics.Dispose();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

private void MainTabControl_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{ www.2cto.com
int x = e.X;
int y = e.Y;

Rectangle tabRect = this.MainTabControl.GetTabRect(this.MainTabControl.SelectedIndex);
tabRect.Offset(tabRect.Width - 0x12, 2);
tabRect.Width = 15;
tabRect.Height = 15;
if ((((x > tabRect.X) && (x < tabRect.Right)) && (y > tabRect.Y)) && (y < tabRect.Bottom))
{
this.MainTabControl.TabPages.Remove(this.MainTabControl.SelectedTab);
}
}
}
==

出处：http://blog.csdn.net/w1wqw/article/details/44356439