Question

我想知道如何将文本框中的值添加到标签中，每次添加另一个Pizza时标签都不会重置为零我基本上需要代码向我展示如何添加保持向标签添加文本框值

private void SummaryBox_TextChanged(object sender, EventArgs e)//Textbox:the value is shown of the pizza selected
        {

        }

        private void txtPizzaPrice_TextChanged(object sender, EventArgs e)
        {

        }
        Menu(object sender, System.ComponentModel.CancelEventArgs e)
{


        private void lblPrice_Click(object sender, EventArgs e)
        {
            // Label where the Pizza prices needs to be added up each time I press add pizza
        }

    }
}

//HERE ARE THE PIZZA VALUES

      double PizzaPrice;//Global


 double ExtraTopping;//Global

        private void radioButton2_CheckedChanged(object sender, EventArgs e)
        {
            string CT;



            if (radioButton2.Enabled == true) //PIZZA CHEESE TOMATO
            {
                double ctp = 3.50;
                PizzaPrice = ctp;

                txtPizzaPrice.Text = "£ " + PizzaPrice.ToString(); //Value I want //to add to lblPrice

                CT = radioButton2.Text;

                SummaryBox.Text = CT;


            }
            else
            {
                SummaryBox.Clear();
            }

        }

        private void radioButton1_CheckedChanged(object sender, EventArgs e)
        {
            string VS;

            if (radioButton1.Enabled == true) //PIZZA Veg SUpreme
            {
                double vsp = 5.20;
                PizzaPrice = vsp;

                txtPizzaPrice.Text = "£ " + PizzaPrice.ToString(); //Value I want //to add to lblPrice

                VS = radioButton1.Text;

                SummaryBox.Text = VS;

            }
            else
            {
                SummaryBox.Clear();
            }

        }

        private void radioButton3_CheckedChanged_1(object sender, EventArgs e)
        {
            string SV;


            if (radioButton3.Enabled == true) //PIZZA SPicy Veg
            {
                double svp = 5.20;
                PizzaPrice = svp;

                txtPizzaPrice.Text = "£ " + PizzaPrice.ToString(); //Value I want //to add to lblPrice

                SV = radioButton3.Text;

                SummaryBox.Text = SV;


            }
            else
            {
                SummaryBox.Clear();  
            }
        }

        private void radioButton6_CheckedChanged(object sender, EventArgs e)
        {
            string MF;

            if (radioButton6.Enabled == true) //PIZZA Veg SUpreme
            {
                double mfp = 5.80;
                PizzaPrice = mfp;

                txtPizzaPrice.Text = "£ " + PizzaPrice.ToString(); //Value I want //to add to lblPrice

                MF = radioButton6.Text;

                SummaryBox.Text = MF;
            }
            else 
            {
                SummaryBox.Clear();
            }
        }

        private void radioButton7_CheckedChanged(object sender, EventArgs e)
        {
            string HP;

            if (radioButton7.Enabled == true) //PIZZA Ham pineapple
            {
                double hpp = 4.20;
                PizzaPrice = hpp;

                txtPizzaPrice.Text = "£ " + PizzaPrice.ToString();
                ^ Value I want to add to lblPrice^

                HP = radioButton7.Text;

                SummaryBox.Text = HP;

            }
            else
            {
                SummaryBox.Clear();

            }
        }

        private void radioButton4_CheckedChanged(object sender, EventArgs e)
        {
            string SF;

            if (radioButton4.Enabled == true) // PIZZA Veg SUpreme
            {
                double sfp = 5.60;
                PizzaPrice = sfp;

                txtPizzaPrice.Text = "£ " + PizzaPrice.ToString(); //Value I want //to add to lblPrice

                SF = radioButton4.Text;

                SummaryBox.Text = SF;

            }
            else
            {
                SummaryBox.Clear();
            }
        }

Answer 1

我相信您要做的是向PizzaPrice添加一个值，然后在txtPizzaPrice.Text上显示，并在前面加上£符号。

PizzaPrice应为property rather than a field。

public double PizzaPrice { get; set; }

请注意我+=披萨价格的值，然后将其显示在文字属性中：

private void radioButton7_CheckedChanged(object sender, EventArgs e)
{
    if (radioButton7.Checked)
    {
        double hpp = 4.20;
        PizzaPrice += hpp;
        txtPizzaPrice.Text = "£ " + PizzaPrice.ToString();
        SummaryBox.Text = radioButton7.Text;
    }
    else
    {
        SummaryBox.Clear();
    }
}

您可以做很多事情来缩短代码。尝试将披萨类型添加到单选按钮的Tag，并使用结构作为披萨值。但是我会把它留给你。

将值从文本框添加到标签

1 个答案: