Visual Studios C# - 在页面刷新时重新调用类

Question

在Visual studio中,每次刷新页面时都会调用该类吗？我有以下类 - 我希望每次单击一个按钮时为变量添加值;

public partial class _Default : System.Web.UI.Page
{
    Random random = new Random();
    int total;
    int playerTotalValue;

    protected void Page_Load(object sender, EventArgs e)
    {
    }
    protected void ranPlayer_Click(object sender, EventArgs e)
    {
        int randomNumTwo = random.Next(1, 10);
        playerTotalValue = playerTotalValue + randomNumTwo; //playerTotalValue gets reset to zero on every click
        playerTotal.Text = playerTotalValue.ToString();
    }
}

每次单击"ranPlayer"按钮时,playerTotalValue都会重置为零,或者这就是我认为发生的事情.

Answer 1

HTTP是无状态的.这意味着它不会像在Windows窗体编程中那样保留变量中的值.因此,每当您单击按钮时,它的执行方式与初始页面加载时的加载方式相同.可是等等 !.您在文本框中有值.因此,您可以从那里读取值并将其存储在变量中.

    protected void ranPlayer_Click(object sender, EventArgs e)
    {
        playerTotalValue =0;
        if(!String.IsNullOrEmpty(playerTotal.Text))
        {
          playerTotalValue =Convert.ToInt32(playerTotal.Text);
        }
        int randomNumTwo = random.Next(1, 10);
        playerTotalValue = playerTotalValue + randomNumTwo; //playerTotalValue gets reset to zero on every click
        playerTotal.Text = playerTotalValue.ToString();
     }