/// <summary>

         ///  添加选项卡

         /// </summary>

         /// <param name="sender"></param>

         /// <param name="e"></param>

         private void button3_Click(object sender, EventArgs e)

         {

             string tpstring = string.Empty;

             if (this.textBox1.Text.Trim() == "")

             {

                 MessageBox.Show("不能为空！");

             }

             else

             {

                 tpstring = this.textBox1.Text.Trim();

                 TabPage tp = new TabPage(tpstring);

                 tabControl1.TabPages.Add(tp);

                 this.textBox1.Text = "";

             }

         }

         /// <summary>

         /// 删除当前选中选项卡

         /// </summary>

         /// <param name="sender"></param>

         /// <param name="e"></param>

         private void button1_Click(object sender, EventArgs e)

         {

             if (tabControl1.TabPages.Count == )

             {

                 MessageBox.Show("已经没有可删除的选项！");

             }

             else

             {

                 tabControl1.TabPages.Remove(tabControl1.SelectedTab);

             }

         }