RegisterForm.cs

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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;
using System.Data.SqlClient;

namespace FamilyFinance
{
    public partial class RegisterForm : Form
    {
        public loginForm lForm;//此变量且来保存登录窗口,将窗体作为变量进行传输
        public RegisterForm()
        {
            InitializeComponent();
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void txtSurePwd_TextChanged(object sender, EventArgs e)
        {

        }

        private void RegisterForm_Load(object sender, EventArgs e)
        {

        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void btnRegister_Click(object sender, EventArgs e)
        {
            bool isEmpty = CheckEmpty();
            if (isEmpty==true)
            {
                string insertSql = string.Format("insert into FamilyUser (userName,password) values('{0}','{1}')",
                                             txtUserName.Text.Trim(), txtPwd.Text.Trim());
                DBhelper dbh = new DBhelper();
                SqlCommand sqlCmd = new SqlCommand(insertSql, dbh.sqlConn);
             
                dbh.sqlConn.Open();

                int effectAccount = sqlCmd.ExecuteNonQuery();
                

                if (effectAccount == 1)
                {
                    MessageBox.Show("数据插入成功,成功注册了一个用户");
                    lForm.GetUserName(txtUserName.Text.Trim()); //跨窗口传递用户名方法
                    txtPwd.Text = "";