C#asp.net按钮单击不显示标签

我正在创建一个简单的账单计算器。单击账单按钮时，标签将显示总额。由于某种原因，该按钮不起任何作用。我的代码中没有任何错误。感谢您的帮助

    protected void btnCalc_Click(object sender, EventArgs e)
{
    Validate();
    if (IsValid)
    {
    }

    decimal tips = Convert.ToDecimal(txtTips.Text);
    decimal meals = Convert.ToDecimal(txtMeals.Text);
    decimal buffets = Convert.ToDecimal(txtBuffets.Text);
    string fname = txtFirstName.Text;
    string tnumber = txtTableNumber.Text;
    decimal mealsvalue = meals * 16.99M;
    decimal buffetsvalue = buffets * 11.5M;
    decimal tax = 0;
    decimal walkR = 0;
    decimal phoneR = 0;

    if (rblTax.SelectedValue == "Tax")
    {
       tax = .06M;
    }
    else
    {
    }


    if (rblReservation.SelectedValue == "Walk-in")
    {
        decimal subtotal = walkR + mealsvalue + buffetsvalue;
        decimal taxvalue = subtotal * tax;
        decimal total = walkR + mealsvalue + buffetsvalue + taxvalue + tips;
        lblSummary.Text = "First name is " + fname + " Table number is " + tnumber + " Walk in cost is " + walkR + " Cost of meals is " + mealsvalue +
        " Cost of buffets is " + buffetsvalue + " Tax is " + taxvalue + " Tip is " + tips + " Total is " + total;
    }
    else if (rblReservation.SelectedValue == "Phone")
    {
        phoneR = 3;
        decimal subtotal = phoneR + mealsvalue + buffetsvalue;
        decimal taxvalue = subtotal * tax;
        decimal total = phoneR + mealsvalue + buffetsvalue + tax + tips;
        lblSummary.Text = "First name is " + fname + " Table number is " + tnumber + " Phone reservation cost is " + phoneR + " Cost of meals is " + mealsvalue +
        " Cost of buffets is " + buffetsvalue + " Tax is " + tax + " Tip is " + tips + " Total is " + total;
    }
    else
    {
        lblSummary.Text = "Please fill out the information";
    }
}

按钮声明

<asp:Button ID="btnCalc" runat="server" Text="Bill" />
    <br />
    <asp:Label ID="lblSummary" runat="server"></asp:Label>

您的ASP.NET代码部分似乎缺少OnClick

<asp:Button ID="btnCalc" runat="server" Text="Bill" OnClick="btnCalc_Click"/>

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您需要告诉按钮声明要使用哪个事件处理程序。 在这种情况下，事件处理程序是

OnClick

，事件函数是

btnCalc\u Click

或者像这样在按钮声明中添加OnClick事件

<asp:Button ID="btnCalc" runat="server" Text="Bill" OnClick="btnCalc_Click" />

btnCalc.Click += btnCalc_Click;

---

Strongsad，您不需要在按钮声明中使用onserverclick=“您的方法的名称”之类的内容吗？我添加了这一点，但现在它表示FormatException未经用户代码处理，并且此行的输入字符串格式不正确：decimal tips=Convert.ToDecimal（txtTips.Text）；很高兴这有帮助。请将解决方案标记为已接受答案，以便其他人不会花费时间回答此问题。谢谢。我添加了这个，但是现在它说FormatException没有被用户代码处理，并且输入字符串在这一行的格式不正确：decimal tips=Convert.ToDecimal（txtTips.Text）；这是另一个问题，与你原来的问题无关。然而，为了回答这个问题，您能告诉我您在TXTIPS文本框中输入了什么吗？你让它空着吗？

btnCalc.Click += btnCalc_Click;