如何在页之间传递值

本文关键字：之间 | 更新日期: 2023-09-27 18:16:50

我正在做航空公司预订系统使用GUI与ASP。. NET中的c#。我想要的是为用户分配座位，在用户分配座位后，该座位不能再被其他人分配。我尝试使用增量这样做，但不是1+1= 2(这意味着座位号2是下一个要分配的)，系统给我1+1=11。我怎样才能做我想做的?

我为此有5个接口，我需要在整个运行过程中存储这个赋值。这是我预订按钮的代码，我有2个，头等舱和经济舱。头等舱只有5个座位，经济舱只有15个座位。我该怎么办?

 protected void Button1_Click(object sender, EventArgs e)
{
    Session["seats"] = "First Class";
    if (firstseatnum > 5)
    {
        MessageBox.Show("Sorry, the first class seats was fully booked. Can you change to economy class?");
        Response.Redirect("reservation.aspx");
    }
    else
    {
        ++firstseatnum;
        totalseatnum1 = Convert.ToInt32(firstseatnum+seatnum);
        Response.Redirect("~/information.aspx?firstseatnum="+firstseatnum+"&seatnum="+totalseatnum1);
    }
}
protected void Button2_Click(object sender, EventArgs e)
{
    Session["seats"] = "Economy Class";
    if (economyseatnum > 20)
    {
        MessageBox.Show("Sorry, the economy class seats was fully booked. Can you change to first class?");
        Response.Redirect("reservation.aspx");
    }
    else
    {
        ++economyseatnum;
        totalseatnum2 = Convert.ToInt32(economyseatnum + seatnum);
        Response.Redirect("information.aspx?economyseatnum=" + economyseatnum + "&seatnum="+totalseatnum2);
    }
}

请帮帮我，谢谢。

如何在页之间传递值

有几种方法:

查询

// Set
var myVariable = "MyData";
Response.Redirect("/NextPage?MyVariable=" + myVariable);
// Get
var data = Request.QueryString["MyVariable"];

饼干

// Set
var cookie = new HttpCookie("MyVariable");
cookie.Value = "NyData";
Response.Cookies.Add(cookie);
Response.Redirect("/NextPage");
// Get
var data = Request.Cookies["MyVariable"].Value;
<<p> 会话/strong> 
// Set
Session["MyVariable"] = "MyData";
Response.Redirect("/NextPage");
// Get
var data = Session["MyVariable"];

Application (Store whole Process)

// Set
Application["MyVariable"] = "MyData";
Response.Redirect("/NextPage");
// Get
var data = Application["MyVariable"];

还可以查看CodeProject文章以查看更多示例和详细解释。

假设seatnum是一个字符串。

如果是，试试

totalseatnum1 = firstseatnum + Convert.ToInt32(seatnum);

和

totalseatnum2 = economyseatnum + Convert.ToInt32(seatnum);
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