同一页面中怎样调用上一单击事件的运算结果？
如：    protected void operator1_Click(object sender, EventArgs e)
    {
        if (TextBox1.Text == "" || TextBox2.Text == "" )
        {
            return;
        }
        Button OperaterButton = (Button)sender;
        float Number1, Number2,Result1 =0;
        Number1 = float.Parse(TextBox1.Text);
        Number2 = float.Parse(TextBox2.Text);
        switch (OperaterButton.ID)
        {
            case "Button1":
                Result1 = Number1 + Number2;
                break;
        }
        TextBox12.Text = Result1.ToString();
    }
    protected void operator2_Click(object sender, EventArgs e)
    {
        
        if (TextBox13.Text == "" || TextBox14.Text == "")
        {
            return;
        }
        Button OperaterButton = (Button)sender;
        float Number13, Number14, Result2 = 0;
        Number13 = float.Parse(TextBox13.Text);
        Number14 = float.Parse(TextBox14.Text);
        switch (OperaterButton.ID)
        {
            case "Button3":
                Result2 = Result1*100 / (Number13 * Number14);
                break;
        }
        TextBox15.Text = Result2.ToString();
    }
operator2_Click事件中的Result1不存在，怎样才能调用operator1_Click事件中的Result1?
求帮忙，非常感谢！

请具体说一下，本人纯新手，在学习中，麻烦了！

试过以后第二个单击事件中仍旧是Result1不存在，求指教

我把两个事件中的参数都声明在方法外面才调试运行成功，但执行第二个事件时Result2没反应，没有执行Result2 = Result1*100 / (Number13 * Number14)，什么原因呢，求指教。。。

非常感谢！！！