userdebarkation.cs

数据库课程设计

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

namespace UI
{
    public partial class UserDebarkation : Form
    {
        //初始化SelectInfo类的对象
        SelectInfo objSelectInfo = new SelectInfo();
      
        public UserDebarkation()
        {
            InitializeComponent();
        }

        ///   <summary>   
        ///   判断要打开的窗体是否已经是子窗体   
        ///   </summary>   
        ///   <param   name="Frm">要打开的窗体</param>   
        ///   <returns>true:是;false:否</returns>   
        private bool IsExistChildForm(Form FrmOpen)
        {
            foreach (Form mdiFrm in this.MdiChildren)
            {
                if (FrmOpen.Text == mdiFrm.Text)
                {
                    FrmOpen.Activate();
                    return true;
                }
            }
            return false;
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            try
            {
                string guan = "管理员";
                string shu = "书籍管理员";
                string jieyue = "书籍管理员";
                if (txtUser.Text == "" || txtPassword.Text=="")
                {
                    MessageBox.Show("用户密码不能为空！");
                }
                DataTable objSelectAdminIfo = objSelectInfo.SelectAdmin(txtUser.Text.ToString(), txtPassword.Text.ToString());
                if (objSelectAdminIfo.Rows.Count == 0)
                {
                    MessageBox.Show("用户名或密码错误!");
                    return;
                }
                else
                {
                   
                    if ((objSelectAdminIfo.Rows[0][4].ToString())=="False")
                    {
                        if (objSelectAdminIfo.Rows[0][3].ToString() == "管理员")
                        {

                            frmMain objfrmMain = frmMain.getfrmMain(guan, txtUser.Text.ToString(), txtPassword.Text.ToString());
                          
                                objfrmMain.Show();
                                this.Close();
                            
                        }
                        else if (objSelectAdminIfo.Rows[0][3].ToString() == "书籍管理员")
                        {
                            frmMain objfrmMain = frmMain.getfrmMain(shu, txtUser.Text.ToString(), txtPassword.Text.ToString());
                  

                                objfrmMain.Show();
                                this.Close();
                            
                        }
                        else
                        {
                            frmMain objfrmMain = frmMain.getfrmMain(jieyue, txtUser.Text.ToString(), txtPassword.Text.ToString());
                          
                          
                                objfrmMain.Show();
                                this.Close();
                           
                        }
                    }
                    else
                    {
                        MessageBox.Show("该用户已经停用!");
                        return;

                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void btnClose_Click(object sender, EventArgs e)
        {
            this.Close();
           Application.Exit();
        }

        private void UserDebarkation_Load(object sender, EventArgs e)
        {

        }
    }
}