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

namespace ExamCenter.FormTier
{
    public partial　class FrmKdManage : System.Windows.Forms.Form
    {
        private System.Windows.Forms.DataGrid dgUsers;
        /// <summary>
        /// 必需的設計器變量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        //用戶數據集
        private DataSet dsUser;
        private DataTable dtUser;

        private enum BtnClick { AddClick, DelClick, EditClick, SaveClick };
        private BtnClick btnClick = BtnClick.SaveClick;

        private DataRow drCurrent;
        public FrmKdManage()
        {
            InitializeComponent();
            MakeBind();
        }
        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose(disposing);
        }

        private void groupBox2_Enter(object sender, EventArgs e)
        {

        }

        private void FrmKdManage_Load(object sender, EventArgs e)
        {

        }
        private void MakeBind()
        {
            //方法：private void MakeBind()
            //參數：空
            //功能：1.返回所有的用戶數據集dsUser
            //      2.將窗體的dgUsers與返回的數據集dsUser綁定
            //	    3.給滾動條UserScroller的屬性DtSet賦值
            //返回：空

            //事例化業務邏輯類
            UserBLC userBlc = new UserBLC();
            //以數據集的形式返回用戶表
            this.dsUser = userBlc.GetAllUser();
            this.dtUser = this.dsUser.Tables[0];


            //將窗體數據網格dgUsers與用戶表綁定
            this.dgUsers.DataSource = this.dtUser;
            //給角色表臨時添加一編號列
            DataColumn dcCurrent = new DataColumn("Current", typeof(int));
            this.dtUser.Columns.Add(dcCurrent);
            //給角色表編號列賦值
            int count = 1;
            foreach (DataRow row in this.dtUser.Rows)
            {
                row["Current"] = count++;
            }
            //設置窗體數據網格表現風格
            DataGridTableStyle dgStyle = new DataGridTableStyle();
            dgStyle.MappingName = this.dsUser.Tables[0].TableName;

            DataGridColumnStyle intCount =
                new DataGridTextBoxColumn();
            intCount.MappingName = "Current";
            intCount.HeaderText = "  用戶編號";
            intCount.Width = 75;
            dgStyle.GridColumnStyles.Add(intCount);

            DataGridColumnStyle ename = new DataGridTextBoxColumn();
            ename.MappingName = "userename";
            ename.HeaderText = "  用戶英文名";
            ename.Width = 105;
            dgStyle.GridColumnStyles.Add(ename);

            DataGridColumnStyle cname = new DataGridTextBoxColumn();
            cname.MappingName = "usercname";
            cname.HeaderText = "  用戶中文名";
            cname.Width = 105;
            dgStyle.GridColumnStyles.Add(cname);


            DataGridColumnStyle password = new DataGridTextBoxColumn();
            password.MappingName = "password";
            password.HeaderText = "        密碼";
            password.Width = 163;
            dgStyle.GridColumnStyles.Add(password);

            this.dgUsers.TableStyles.Add(dgStyle);
            this.txtPassword.Enabled = false;
            this.txtUserCname.Enabled = false;
            this.txtUserEname.Enabled = false;
            this.btnAddUser.Enabled = true;
            this.btnDelUser.Enabled = true;
            this.btnEdit.Enabled = true;
            //this.btnAssignRole.Enabled = true;
            this.btnSave.Enabled = false;
            this.btnClick = BtnClick.SaveClick;
            //默認顯示第一行
            if (this.dtUser.Rows.Count > 0)
            {
                this.txtPassword.Text = this.dtUser.Rows[0]["password"].ToString();
                this.txtUserCname.Text = this.dtUser.Rows[0]["usercname"].ToString();
                this.txtUserEname.Text = this.dtUser.Rows[0]["userename"].ToString();
            }
            this.dgUsers.Enabled = true;
        }

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

        private void btnAddKd_Click(object sender, EventArgs e)
        {
            this.dgUsers.Enabled = false;
            //添加用戶
            this.btnClick = BtnClick.AddClick;
            this.btnAddUser.Enabled = false;
            this.btnDelUser.Enabled = false;
            this.btnEdit.Enabled = false;
            //this.btnAssignRole.Enabled = false;
            this.btnSave.Enabled = true;

            this.drCurrent = this.dtUser.NewRow();
            this.drCurrent["password"] = "";
            this.drCurrent["usercname"] = "";
            this.drCurrent["userename"] = "";
            this.dtUser.Rows.Add(this.drCurrent);

            this.txtPassword.Text = "";
            this.txtUserCname.Text = "";
            this.txtUserEname.Text = "";
            this.txtPassword.Enabled = true;
            this.txtUserCname.Enabled = true;
            this.txtUserEname.Enabled = true;


            this.dgUsers.Refresh();
        }

        private void btnEditKd_Click(object sender, EventArgs e)
        {
            //編輯用戶
            if (this.dgUsers.VisibleRowCount == 0)
                return;
            this.dgUsers.Enabled = false;
            this.btnClick = BtnClick.EditClick;
            this.btnAddUser.Enabled = false;
            this.btnDelUser.Enabled = false;
            this.btnEdit.Enabled = false;
            //this.btnAssignRole.Enabled = false;
            this.btnSave.Enabled = true;

            BindingManagerBase bm;
            bm = this.BindingContext[this.dtUser];
            this.drCurrent = this.dtUser.Rows[bm.Position];
            this.drCurrent["userename"] = "";

            //			this.txtPassword.Enabled = true;
            this.txtUserCname.Enabled = true;
            this.txtUserEname.Enabled = true;	
        }

        private void btnDelKd_Click(object sender, EventArgs e)
        {
            if (this.dgUsers.VisibleRowCount == 0)
                return;
            this.dgUsers.Enabled = false;
            this.btnClick = BtnClick.DelClick;
            this.btnAddUser.Enabled = false;
            this.btnDelUser.Enabled = false;
            this.btnEdit.Enabled = false;
            //this.btnAssignRole.Enabled = false;
            this.btnSave.Enabled = true;

            BindingManagerBase bm;
            bm = this.BindingContext[this.dtUser];
            this.drCurrent = this.dtUser.Rows[bm.Position];
        }

        private void btnSaveKd_Click(object sender, EventArgs e)
        {
            if (this.btnClick == BtnClick.AddClick)
            {
                foreach (DataRow dr in this.dtUser.Rows)
                {
                    if (dr["userename"].ToString().Equals(this.txtUserEname.Text))
                    {
                        MessageBox.Show("此用戶英文名在數據庫中已存在，請輸入另外一個英文名", "警告");
                        this.txtUserEname.Text = "";
                        this.txtUserCname.Text = "";
                        this.txtPassword.Text = "";
                        return;
                    }
                }
                this.drCurrent["password"] = new UserBLC().EncryptPassword(this.txtPassword.Text);
                this.drCurrent["usercname"] = this.txtUserCname.Text;
                this.drCurrent["userename"] = this.txtUserEname.Text;

            }
            if (this.btnClick == BtnClick.EditClick)
            {
                foreach (DataRow dr in this.dtUser.Rows)
                {
                    if (dr["userename"].ToString().Equals(this.txtUserEname.Text))
                    {
                        MessageBox.Show("此用戶英文名在數據庫中已存在，請輸入另外一個英文名", "警告");
                        this.txtUserEname.Text = "";
                        return;
                    }
                }
                this.drCurrent["usercname"] = this.txtUserCname.Text;
                this.drCurrent["userename"] = this.txtUserEname.Text;
            }
            if (this.btnClick == BtnClick.DelClick)
            {
                //設置彈出對話框的模式
                string message = "你真要刪除" + "“ " + this.drCurrent["usercname"].ToString() + " ”" + "這個用戶嗎？ 取消這個操作？";
                string caption = "刪除警告                                                                         ";
                MessageBoxButtons buttons = MessageBoxButtons.YesNo;
                DialogResult result;

                //顯示對話框
                result = MessageBox.Show(this, message, caption, buttons,
                    MessageBoxIcon.Question, MessageBoxDefaultButton.Button1,
                    MessageBoxOptions.RightAlign);
                //確定刪除
                if (result == DialogResult.Yes)
                {
                    //刪除選定用戶
                    this.drCurrent.Delete();
                }
            }
            //更新數據源
            UserBLC userBlc = new UserBLC();
            userBlc.UpdateUser(this.dsUser);
            //清除存在的數據網格風格
            DataGridTableStyle existingTableStyle = this.dgUsers.TableStyles[0];
            this.dgUsers.TableStyles.Remove(existingTableStyle);
            //重新綁定
            MakeBind();
        }

  
    }
}