form1.cs

通讯录 采用xmlC#做的 很不错的啊

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

namespace 通讯录
{
    public partial class Form1 : Form
    {
        private DataSet myDataset = new DataSet();
        public Form1()
        {
            InitializeComponent();
            myDataset.ReadXml("Data\\User.xml");
        }

        private void btnLogin_Click(object sender, EventArgs e)
        {
            string username = txtUsername.Text.Trim();
            string password = txtPassword.Text.Trim();
            if (username == "")
            {
                MessageBox.Show("用户名不能为空！", "温馨提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            if (password == "")
            {
                MessageBox.Show("密码不能为空！", "温馨提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            string validatePwd = "";
            DataRow[] rowList = myDataset.Tables[0].Select("用户名='" + username + "'");
            foreach (DataRow row in rowList)
            {
                validatePwd = row["用户密码"].ToString();
                if (validatePwd == password)
                {
                    this.Hide();//隐藏窗体
                    string xpath = row["资料路径"].ToString();
                    MainForm myMainForm = new MainForm(xpath);
                    myMainForm.Show();
                    return;
                }
              
            }
            MessageBox.Show("用户名或密码不正确！", "温馨提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }

        private void lblRegister_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            RegisterForm myRForm = new RegisterForm(myDataset);
            myRForm.ShowDialog();
        }

        private void lblGetPwd_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            pwdClewForm myPwdClewForm = new pwdClewForm(myDataset);
            myPwdClewForm.ShowDialog();
        }
    }
}