Question

我有一个程序，其中用户填写表单并点击计算，然后当用户点击摘要时，它将显示已输入数据的所有用户。当更多用户输入数据时，只需使用相同的lbl（lblUsers）将它们添加到摘要中，我遇到的唯一问题是能够将最新的条目删除到摘要中，这将是最新制作的标签。

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace LifeInsurance
{
public partial class frmMain : Form
{
    double commissionRate;
    double insuranceAmount;
    double totalAmount;
    int numberOfCustomers;
    double totalInsuranceDollars;
    double totalCommission;



    private void btnClearAll_Click(object sender, EventArgs e)
    {
        lblUsers.Text = "";
    }

    public frmMain()
    {
        InitializeComponent();
    }





    private void frmMain_Load(object sender, EventArgs e)
    {

    }

    private void btnCalculate_Click(object sender, EventArgs e)
    {
        try
        {
            string firstName = txtFirstName.Text;
            string lastName = txtLastName.Text;
            insuranceAmount = int.Parse(txtInsuranceAmount.Text);
        }catch (Exception)
        {
            MessageBox.Show("You must enter all details");
        }
        if(insuranceAmount>= 1000)
        {
            commissionRate = 0.005;
            totalAmount = insuranceAmount * 0.005;
        }
        if (insuranceAmount >= 100000)
        {
            commissionRate = 0.0010;
            totalAmount = insuranceAmount * 0.0010;
        }
        if (insuranceAmount >= 1000000)
        {
            commissionRate = 0.0015;
            totalAmount = insuranceAmount * 0.0015;
        }
        totalInsuranceDollars += totalAmount;
        totalCommission += commissionRate;
        numberOfCustomers += 1;
        lblUsers.Text += "Name: "+txtFirstName.Text +" "+ txtLastName.Text+"         
        "+ "Payout Amount: "+totalAmount+Environment.NewLine;
        lblUsers.Text += "Total Policies: " + numberOfCustomers+" " + "Total 
        Insurance Dollars Earned: " + totalInsuranceDollars+" " + "Total 
        Commission Earned: " + totalCommission+Environment.NewLine;
    }
    private void btnSummary_Click(object sender, EventArgs e)
    {
        lblUsers.Visible = true ;
    }
    private void btnClear_Click(object sender, EventArgs e)
    {

        //remove one label
    }

  }
}

Answer 1

对不起，如果我理解正确，你希望你的标签在用户点击＆＃34;摘要＆＃34;时显示除最后一个条目以外的所有条目。那是对的吗？因此，在屏幕截图中显示3个条目，但您只想显示2个条目？

如果是，请查看是否有帮助：

public static void btnSummary_Click(object sender, EventArgs e)
    {
        string currentText = lblUsers.Text;
        int positionOfLastEntry = currentText.LastIndexOf("Name:");
        string textWithoutLastEntry = currentText.Substring(0, positionOfLastEntry);
        lblUsers.Text = textWithoutLastEntry;
        lblUsers.Visible = true;
    }

删除重复的标签

1 个答案: