C# 家庭财务管理系统源码(入门级)

【实例截图】

【核心代码】

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

namespace 家庭财务管理系统
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }
        public static string id = "";
        public static string kahao = "";
        public static string shijian = "";
        public static string jine = "";
        public static string leixing = "";

        private void label4_Click(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            string num = this.textBox1.Text;
            string time = this.textBox2.Text;
            string type = this.textBox4.Text;
       

            if (num == "")
            {
                MessageBox.Show("银行卡号不能为空");
            }
            else
            {
                float money = float.Parse(this.textBox3.Text);
                if (money < 0)
                {
                    MessageBox.Show("交易金额必须大于0");
                }
                else
                {
                    string sql = string.Format("insert into bankCard values('{0}','{1}','{2}','{3}')", num, time, money, type);

                    if (DBHelper.ExecuteNonQuery(sql))
                    {
                        MessageBox.Show("新增成功");

                    }
                    string sql1 = string.Format("select * from bankCard ");
                    DataTable dt = DBHelper.GetDataTable(sql1);
                    this.dataGridView1.DataSource = dt;
                    this.textBox1.Text = "";
                    this.textBox2.Text = "";
                    this.textBox3.Text = "";
                    this.textBox4.Text = "";
                }
            }
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            string sql = string.Format("select * from bankCard");
            DataTable dt = DBHelper.GetDataTable(sql);
            this.dataGridView1.DataSource = dt;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.textBox1.Text = "";
            this.textBox2.Text = "";
            this.textBox3.Text = "";
            this.textBox4.Text = "";
        }

        private void dataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            id = this.dataGridView1.SelectedRows[0].Cells[0].Value.ToString();
            kahao = this.dataGridView1.SelectedRows[0].Cells[1].Value.ToString(); 
            shijian = this.dataGridView1.SelectedRows[0].Cells[2].Value.ToString(); 
            jine = this.dataGridView1.SelectedRows[0].Cells[3].Value.ToString();
            leixing = this.dataGridView1.SelectedRows[0].Cells[4].Value.ToString();

            UpdateForm update = new UpdateForm();
            update.Show();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            string sql1 = string.Format("select * from bankCard ");
            DataTable dt = DBHelper.GetDataTable(sql1);
            this.dataGridView1.DataSource = dt;
        }
    }
}