frmbrokenchild.cs

来自「Microsoft Mobile Development Handbook的代码」· CS 代码 · 共 41 行

using System;
using System.Windows.Forms;
using System.Drawing;

namespace CodeForChapter2
{
  public partial class frmBrokenChild : CodeForChapter2.frmBaseWithSIP
  {
    public frmBrokenChild()
    {
      InitializeComponent();
    }


    private int lastIndex = 0;
    private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
    {
      int newIndex = tabControl1.SelectedIndex;
      if (newIndex == lastIndex)
      {
        // validation failed
        tabControl1.TabPages[lastIndex].BackColor = Color.Red;

        // prevent infinite loop
        return;
      }

      if (checkBox1.Checked) // your own validation logic
      {
        tabControl1.SelectedIndex = lastIndex; // raises this event again
        return;
      }

      // update our knowledge
      tabControl1.TabPages[lastIndex].BackColor = Color.White;
      lastIndex = newIndex;
    }
  }
}