在3个文本框中输入值，并在第4个显示计算结果 [英] Input values in 3 textboxes and display the calculation result in 4th

问题描述

大家好，



我最近建立了一个网站，根据各种条件计算您的房屋预算。对于演示，我制作了4个方框，第1个用于工资，相应的第2个和第3个用于支出。

如何输入第1个，第2个第3个文本框的值并显示第1个的减去值 - （第二个+第三个文本框）进入第四个？

Hello everyone,

I recently made a website which calculates your home budget on the basis of various conditions. For the demo I made 4 boxes, 1st for salary and corresponding 2nd and 3rd for expenditures.
How can I input the values of 1st, 2nd n 3rd text boxes and display the subtracted value of 1st - (2nd + 3rd text box) into the fourth one?

推荐答案

由于你没有提到你使用哪种语言我用C＃尝试，当你按一个按钮时，计算是完成并在第4个文本框中显示结果..

As you not mentioned which language you use i try it with C#,when you press a button the calculation is done and show the result in 4th textbox..

protected void Button1_Click(object sender, EventArgs e)
{
    double value1, value2, value3, value4;
    value1 = Convert.ToDouble(TextBox2.Text);
    value2 = Convert.ToDouble(TextBox3.Text);
    value3 = Convert.ToDouble(TextBox4.Text);
    value4=value1-(value2+value3);
    TextBox5.Text = value4.ToString();
}

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