如何在按下Visual C#中的特定按钮之前不断向标签添加数据？

我做了一个简单的计算器，它工作得很好。我添加了一个文本框和一个标签。文本框显示结果，而标签显示当前操作。我想一直显示我在标签中输入的值，直到我按下equal按钮得到答案。例如，我添加1+2+3

标签应显示-->1+2+3 文本框应显示-->6作为最终答案

这是我的密码

namespace My_First_Calculator
{
    public partial class Form1 : Form
    {
        Double resultVal = 0;
        String operationPerformed = "";
        bool isOperationPerformed = false;

        public Form1()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button_Click(object sender, EventArgs e) //common method to other number buttons
        {
            if (textBox_Result.Text == "0" || isOperationPerformed)
                textBox_Result.Clear();

            isOperationPerformed = false;
            Button button = (Button)sender;

            if(button.Text == ".")
            {
                if(!textBox_Result.Text.Contains("."))
                    textBox_Result.Text = textBox_Result.Text + button.Text;
            }
            else
            textBox_Result.Text = textBox_Result.Text + button.Text;
        }

        private void operator_Click(object sender, EventArgs e)
        {
            Button button = (Button)sender;
            if (resultVal != 0)
            {
                buttonEqual.PerformClick();
                operationPerformed = button.Text;
                labelCurrentOpration.Text = labelCurrentOpration.Text + resultVal + " " + operationPerformed;
                isOperationPerformed = true;
            }
            else
            {
                operationPerformed = button.Text;
                resultVal = Double.Parse(textBox_Result.Text);
                labelCurrentOpration.Text = labelCurrentOpration.Text + resultVal + " " + operationPerformed;
                isOperationPerformed = true;
            }
        }

        private void button18_Click(object sender, EventArgs e) //buttonClaerAll
        {
            textBox_Result.Text = "0";
            resultVal = 0;
            labelCurrentOpration.Text = "";
        }

        private void button17_Click(object sender, EventArgs e) //buttonClear
        {
            textBox_Result.Text = "0";
            //resultVal = 0;
        }

        private void button16_Click(object sender, EventArgs e) //buttonEqual
        {
            switch(operationPerformed)
            {
                case "+": 
                    textBox_Result.Text = (resultVal + Double.Parse(textBox_Result.Text)).ToString();
                    break;
                case "-":
                    textBox_Result.Text = (resultVal - Double.Parse(textBox_Result.Text)).ToString();
                    break;
                case "*":
                    textBox_Result.Text = (resultVal * Double.Parse(textBox_Result.Text)).ToString();
                    break;
                case "/":
                    textBox_Result.Text = (resultVal / Double.Parse(textBox_Result.Text)).ToString();
                    break;
                default: break;
            }

            resultVal = Double.Parse(textBox_Result.Text);
            labelCurrentOpration.Text = "";
        }
    }

---

您需要将新字符串附加到标签中的现有文本中

private void button_Click(object sender, EventArgs e)
{
    if (textBox_Result.Text == "0" || isOperationPerformed)
        textBox_Result.Clear();

    isOperationPerformed = false;
    Button button = (Button)sender;

    if(button.Text == ".")
    {
        if(!textBox_Result.Text.Contains("."))
            textBox_Result.Text = textBox_Result.Text + button.Text;
    }
    else
        textBox_Result.Text = textBox_Result.Text + button.Text;

    labelCurrentOperation.Text = labelCurrentOperation.Text + " " + button.Text;
}


private void operator_Click(object sender, EventArgs e)
{
    Button button = (Button)sender;
    if (resultVal != 0)
    {
        button16.PerformClick();
        operationPerformed = button.Text;
        labelCurrentOpration.Text = labelCurrentOpration.Text + " " + resultVal + " " + operationPerformed;
        isOperationPerformed = true;
    }
    else
    {
        operationPerformed = button.Text;
        resultVal = Double.Parse(textBox_Result.Text);
        labelCurrentOpration.Text = labelCurrentOpration.Text + " " + resultVal  + " " + operationPerformed;
            isOperationPerformed = true;
    }
}

---

始终为控件命名有意义的名称！当你看到

clearButton

而不是

button18

时，它会帮你——以及维护你的代码的其他人——省去头疼的事。好吧，它部分有效，但我希望标签显示我输入的所有内容，例如1+2+3+10-6@AshaneAlvis查看我的编辑。我猜有一点，因为你的方法名称不清楚。关键是你只需要将新字符串附加到现有的文本中。不，上面的答案根本不起作用。它只是复制数字，就像我按3，然后单击“添加”或“减去”按钮一样，它只是复制为33。只需查看windows 8.1中的Microsoft默认计算器，它在右上角显示到目前为止所做的操作（直到我按CE按钮清除所有字段）。我只需要实现这一点。你能帮我吗？我需要帮助。你能看一下吗？