将两个文本框相乘并将结果放置在标签中

本文介绍了将两个文本框相乘并将结果放置在标签中的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

当我在页面中输入值时，我有两个文本框，结果应显示在同一页面中.

i have tow text boxes when i entered the values in the page the result should be displayed in the same page

推荐答案

double num1, num2;
private void button1_Click(object sender, EventArgs e)
{
    num1 = Convert.ToDouble(textBox1.Text);
    num2 = Convert.ToDouble(textBox2.Text);
    label1.Text = Convert.ToString(num1 * num2);
}

<body>
    <form id="form1" runat="server">
    <div>
    <asp:label id="lblNumber1" runat="server" text="Enter first value:" xmlns:asp="#unknown"></asp:label>
    <asp:textbox id="txtNumber1" runat="server" xmlns:asp="#unknown"></asp:textbox>
    <br />
    <asp:label id="lblNumber2" runat="server" text="Enter second value:" xmlns:asp="#unknown"></asp:label>
    <asp:textbox id="txtNumber2" runat="server" xmlns:asp="#unknown"></asp:textbox>
    <br />
    <asp:button id="btnMultiplication" runat="server" text="Multiplication" onclick="OnBtnMultiplicationClick" xmlns:asp="#unknown"></asp:button>
    <br /><asp:label id="lblMultiplication" runat="server" xmlns:asp="#unknown"></asp:label>
    </div>
    
    </form>
</body>

现在在(test.aspx.cs)后面的代码中:
----------------------------------

Now on code behind (test.aspx.cs):
----------------------------------

 protected void OnBtnMultiplicationClick(object sender, EventArgs e)
        {
            int num1=Convert.ToInt32(txtNumber1.Text);
            int num2 = Convert.ToInt32(txtNumber2.Text);
            lblMultiplication.Text = (num1 * num2).ToString();

        }
**Validation is not done so check for Null or empty value.

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