一、具体代码

Default2.aspx.cs

public partial class Chapter1_Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    int a = 0;
    private int t;
    public static int Count=0;
    public static  int right=0;
    protected void Button1_Click(object sender, EventArgs e)
    {
        int a = int.Parse(TextBox1.Text.Trim());
        int b = int.Parse(TextBox3.Text.Trim());
        Char c = Convert.ToChar(TextBox2.Text.Trim());
        Lei con = new Lei();
        con.Max(a, b, c);
        if (con.Answer == int.Parse(TextBox4.Text.Trim()))
        {
            Label1.Text=("恭喜你，小朋友！回答正确！");
            Label1.ForeColor=Color.Blue;
            right++;

        }

        else
        {

            Label1.Text = ("回答错误，继续加油！小朋友");
            Label1.ForeColor = Color.Red;

        }

    }

    protected void Button2_Click(object sender, EventArgs e)
    {
        Count++;
        StreamWriter baocun1 = File.AppendText("C:\\baocun1.txt");
        baocun1.WriteLine(TextBox1.Text);
        baocun1.Close();
        StreamWriter baocun2 = File.AppendText("C:\\baocun2.txt");
        baocun2.WriteLine(TextBox2.Text);
        baocun2.Close();
        StreamWriter baocun3 = File.AppendText("C:\\baocun3.txt");
        baocun3.WriteLine(TextBox3.Text);
        baocun3.Close();
        ListBox1.Items.Add(TextBox1.Text + TextBox2.Text + TextBox3.Text + "=");
        TextBox1.Text = "";
        TextBox2.Text = "";
        TextBox3.Text = "";
    }
    protected void Button3_Click(object sender, EventArgs e)
    {
        TextBox1.BackColor = Color.Yellow;
        TextBox2.BackColor = Color.Yellow;
        TextBox3.BackColor = Color.Yellow;
        TextBox4.BackColor = Color.Yellow;
        TextBox1.Enabled = false;
        TextBox2.Enabled = false;
        TextBox3.Enabled = false;
        string[] m = new string[100];
        m = File.ReadAllLines("C:\\baocun1.txt");
        TextBox1.Text = m[a];
        string[] n = new string[100];
        n = File.ReadAllLines("C:\\baocun2.txt");
        TextBox2.Text = n[a];
        string[] v = new string[100];
        v = File.ReadAllLines("C:\\baocun3.txt");
        TextBox3.Text = v[a];
        a++;

    }

    protected void Button4_Click(object sender, EventArgs e)
    {
        TextBox1.Text = "";
        TextBox2.Text = "";
        TextBox3.Text = "";
        TextBox4.Text = "";
        Label1.Text = "";
    }
    protected void Button5_Click(object sender, EventArgs e)
    {
        Label6.Text = "总计";
        Label7.Text = "正确";
        Label8.Text = "正确率";
        Label3.Text = Count.ToString();
        Label4.Text = right.ToString();
        Label5.Text = ((right / (double)(Count)) * 100).ToString() + "%";
    }

}

封装代码：

类代码要写在App_Code里

public class Lei
{

    public int Sum;

        public int Answer
        {
            get { return Sum; }

        }
        public int Max(int n1,int n2,char yunsuanfu)
        {
            if (yunsuanfu == ‘+‘)
            {
                return Sum = n1 + n2;
            }
            else if (yunsuanfu == ‘-‘)
            {

                    return Sum = n1 - n2;

            }
            else if (yunsuanfu == ‘/‘)
            {

                    return Sum = n1 / n2;

            }
            else if (yunsuanfu == ‘*‘)
            {
                return Sum = n1 * n2;

            }
            return Sum;

        }

    }
    

二、测试