BookManager/frmBookType/frmBookTypeInfo.cs

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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;
using Model;
using BLL;

namespace BookManager.frmBookType
{
    public partial class frmBookTypeInfo : Form
    {
        private DataTable dtType = new DataTable();
        public frmBookTypeInfo()
        {
            InitializeComponent();
        }
        private void dgvload()
        {
            dgvType.DataSource = dtType;
            //设置主键
            DataColumn[] dc = { dtType.Columns["bookTypeId"] };
            dtType.PrimaryKey = dc;
            dgvType.Columns["bookTypeId"].HeaderText = "类别编号";
            dgvType.Columns["bookTypeName"].HeaderText = "类别名称";
        }
        private void frmBookTypeInfo_Load(object sender, EventArgs e)
        {
            BookTypeBLL bookTypeBLL = new BookTypeBLL();
            dtType = bookTypeBLL.getType();
            dgvType.DataSource = dtType;
            //设置主键
            DataColumn[] dc = { dtType.Columns["bookTypeId"] };
            dtType.PrimaryKey = dc;
            dgvType.Columns["bookTypeId"].HeaderText = "类别编号";
            dgvType.Columns["bookTypeId"].Width = 210;
            dgvType.Columns["bookTypeName"].HeaderText = "类别名称";
            dgvType.Columns["bookTypeName"].Width = 210;
            dgvload();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            BookTypeBLL bookTypeBLL = new BookTypeBLL();
            dgvType.DataSource = bookTypeBLL.getTypeBy(txtTypeId.Text, cobSelect.Text);
        }

        private void btnDel_Click(object sender, EventArgs e)
        {
            DialogResult result = MessageBox.Show("是否删除？", "删除类别信息", MessageBoxButtons.YesNo);
            if (result == DialogResult.Yes)
            {
                for (int n = dgvType.SelectedRows.Count - 1; n >= 0; n--)
                {
                    int i = dgvType.SelectedCells[n].RowIndex;
                    string bookTypeId = dgvType.Rows[i].Cells["bookTypeId"].Value.ToString();
                    DataRow dr = dtType.Rows.Find(bookTypeId);