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处理 SelectedIndexChanged 对于 tabControl . 检查是否 tabControl1.SelectedIndex ==我想要的和 呼叫 textBox.Focus();

顺便说一句,我用的是VS2008。

类似这样的方法奏效了:

private void tabControl1_selectedIndexChanged(object sender, EventArgs e)
{
   if (tabControl1.SelectedIndex == 1)
   {
      textBox1.Focus();
   }
}

尝试TabPage。输入如下内容

        private void tabPage1_Enter(object sender, EventArgs e)
        {
            TabPage page = (TabPage)sender;
            switch (page.TabIndex)
            {
                case 0:
                    textBox1.Text = "Page 1";
                    if (!textBox1.Focus())
                        textBox1.Focus();

                    break;
                case 1:
                    textBox2.Text = "Page 2";

                    if (!textBox2.Focus())
                        textBox2.Focus();

                    break;
                default:
                    throw new InvalidOperationException();
            }
        }