C#编程 家庭理财系统 代码追踪学习

Question

本帖最后由 chenjinglong 于 2013-09-20 18:36:47 编辑

Answer 1

用户名是否为空判断
 private bool checkEmpty()
        {
            bool result = true;  //定义默认返回结果为true            if (txtUserName.Text.Trim() == string.Empty)
            {
                lblUserEmpty.Visible = true;
                result = false;
            }
            else
            {
                lblUserEmpty.Visible = false;            }            if (txtPassWord.Text == string.Empty)
            {
                lblPassEmpty.Visible = true;
                result = false;
            }
            else
            {
                lblPassEmpty.Visible = false;
            }
            return result;
        }

Answer 2

注册代码实现：
       private bool checkEmpty()
        {
            bool result = true;
            if (txtUserName.Text.Trim() == string.Empty)
            {
                lblUserError.Visible = true;
                result = false;
            }
            else
            {
                lblUserError.Visible = false;
            }
            if (txtPassWord.Text == string.Empty)
            {
                lblPassError.Visible = true;
                result = false;
            }
            else
            {
                lblPassError.Visible = false;
            }
            if (txtCPass.Text == string.Empty)
            {
                lblCoformError.Visible = true;
                result = false;
            }
            else if (txtPassWord.Text != txtCPass.Text)
            {
                lblPassError.Visible = false;
                lblCoformError.Visible = false;
                MessageBox.Show("密码不匹配请重新输入,请重新输入");
                txtPassWord.Clear();
                txtCPass.Clear();
                result = false;
            }            return result;
        }        private void btnRegist_Click(object sender, EventArgs e)
        {
           // SqlCommand ins = null;
            bool isEmpty = checkEmpty();
            if (isEmpty == true)
            {
                try
                {
                    DBHelper.connect.Open();
                    string sql = string.Format(@"insert into [FamilyUser] values('{0}','{1}')", txtUserName.Text.Trim(), txtPassWord.Text);
                    SqlCommand ins = new SqlCommand(sql, DBHelper.connect);
                    int count = ins.ExecuteNonQuery();
                    if (count == 1)
                    {                        MessageBox.Show("你已经成功注册");
                        this.Close();                    }
                }
                catch (SqlException ex)
                {
                    MessageBox.Show("注册失败 原因如下" + ex.Message);
                }
                finally
                {
                    
                    DBHelper.connect.Close();
                }
            }

Answer 3

代码分享？你不如把完整的项目上传到download.csdn.net中，然后把链接贴出来。