求类似案例源码！！winform用户登陆只能查看自己的信息 并且不可修改

管理员可查看所有人 可以修改指定用户指定权限

满足标题就可以了

 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 Q691926
{
    public partial class LoginDialog : Form
    {
        public LoginDialog()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var db = new Q691926DBClassDataContext();
            if (db.UserInfos.Any(x => x.username == textBox1.Text && x.pwd == textBox2.Text))
            {
                this.Hide();
                Session.UserName = textBox1.Text;
                var f = new MainForm();
                f.FormClosed += new FormClosedEventHandler(f_FormClosed);
                f.Show();
            }
            else
            {
                MessageBox.Show("wrong password!");
            }
        }

        void f_FormClosed(object sender, FormClosedEventArgs e)
        {
            this.Show();
        }
    }
}

 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 Q691926
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            var db = new Q691926DBClassDataContext();
            string query = db.UserInfos.First(x => x.username == Session.UserName).info;
            label1.Text = query;
        }
    }
}

做好登录，用对象存储用户身份就行了，然后依据身份读取自己的或者所有人的信息

你这个应该很简单的。等会登陆你显示用户自己的信息。管理员登陆时，查询所有咯，管理员可以指定用户权限，这个是就相当于修改了。权限字段。
然后相应功能，sql里条件加权限咯。也可以给你写个简单列子。

完整代码：https://download.csdn.net/download/dabocaiqq/10475944
求采纳，谢谢。

权限也给你做了

下载：https://download.csdn.net/download/dabocaiqq/10476038

 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 Q691926
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            var db = new Q691926DBClassDataContext();
            string query = db.UserInfos.First(x => x.username == Session.UserName).info;
            label1.Text = query;
            if (db.UserInfos.First(x => x.username == Session.UserName).isadmin)
            {
                panel1.Visible = true;
                comboBox1.Items.Clear();
                foreach (var item in db.UserInfos)
                {
                    comboBox1.Items.Add(item.username);
                }
                comboBox1.TextChanged += new EventHandler(comboBox1_TextChanged);
            }
            else
            {
                panel1.Visible = false;
            }
        }

        void comboBox1_TextChanged(object sender, EventArgs e)
        {
            var db = new Q691926DBClassDataContext();
            if (db.UserInfos.Any(x => x.username == comboBox1.Text))
            {
                textBox1.Text = db.UserInfos.First(x => x.username == comboBox1.Text).info;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var db = new Q691926DBClassDataContext();
            if (db.UserInfos.Any(x => x.username == comboBox1.Text))
            {
                var u = db.UserInfos.First(x => x.username == comboBox1.Text);
                u.info = textBox1.Text;
                db.SubmitChanges();
            }
        }
    }
}