实例介绍
【实例简介】
附件数据库后需修改 数据库连接串为本地数据库的密码（在DAL/DBHelper.cs中修改即可），vs2017已测试通过
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【实例截图】
【核心代码】
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 LoginFrame
{
public partial class FrmQueryBook : Form
{
public FrmQueryBook()
{
InitializeComponent();
}
private void dtp_publishDate_ValueChanged(object sender, EventArgs e)
{
this.txt_publishDate.Text = this.dtp_publishDate.Value.ToShortDateString();
}
private void txt_publishDate_DoubleClick(object sender, EventArgs e)
{
this.txt_publishDate.Text = "";
}
private void Btn_Query_Click(object sender, EventArgs e)
{
string sqlstr = " where 1=1 ";
if (this.txt_bookName.Text != "")
{
sqlstr = " and bookName like '%" this.txt_bookName.Text "%'";
}
if (this.cb_bookType.SelectedValue.ToString() != "0")
{
sqlstr = " and bookType=" this.cb_bookType.SelectedValue.ToString();
}
if (this.txt_barcode.Text != "")
{
sqlstr = " and barcode like '%" this.txt_barcode.Text "%'";
}
if (this.txt_publishDate.Text != "")
{
sqlstr = " and convert(char(11),publishDate,20) ='" this.txt_publishDate.Text "'";
}
HWhere.Text = sqlstr;
BindData("");
}
public void BindData(string strClass)
{
int DataCount = 0;
int NowPage = 1;
int AllPage = 0;
int PageSize = Convert.ToInt32(HPageSize.Text);
switch (strClass)
{
case "next":
NowPage = Convert.ToInt32(HNowPage.Text) 1;
break;
case "up":
NowPage = Convert.ToInt32(HNowPage.Text) - 1;
break;
case "end":
NowPage = Convert.ToInt32(HAllPage.Text);
break;
case "refresh":
NowPage = Convert.ToInt32(HNowPage.Text);
break;
default:
break;
}
DataTable dsLog = BLL.bllBook.GetBook(NowPage, PageSize, out AllPage, out DataCount, HWhere.Text);
if (dsLog.Rows.Count == 0 || AllPage == 1)
{
LBEnd.Enabled = false;
LBHome.Enabled = false;
LBNext.Enabled = false;
LBUp.Enabled = false;
}
else if (NowPage == 1)
{
LBHome.Enabled = false;
LBUp.Enabled = false;
LBNext.Enabled = true;
LBEnd.Enabled = true;
}
else if (NowPage == AllPage)
{
LBHome.Enabled = true;
LBUp.Enabled = true;
LBNext.Enabled = false;
LBEnd.Enabled = false;
}
else
{
LBEnd.Enabled = true;
LBHome.Enabled = true;
LBNext.Enabled = true;
LBUp.Enabled = true;
}
this.dataGridView_Book.DataSource = dsLog.DefaultView;
PageMes.Text = string.Format("[每页{0}条 第{1}页／共{2}页 共{3}条]", PageSize, NowPage, AllPage, DataCount);
HNowPage.Text = Convert.ToString(NowPage );
HAllPage.Text = AllPage.ToString();
if (dsLog.Rows.Count > 0)
{
this.Btn_Update.Enabled = true;
this.Btn_Del.Enabled = true;
}
else
{
this.Btn_Update.Enabled = false;
this.Btn_Del.Enabled = false;
}
}
/*开始加载窗体后*/
private void FrmQueryBook_Load(object sender, EventArgs e)
{
//查询所有的图书类别
DataSet bookTypeDs = BLL.bllBookType.getAllBookType();
DataTable newDataTable = new DataTable();
newDataTable.Columns.Add("bookTypeId");
newDataTable.Columns.Add("bookTypeName");
foreach (DataRow oldDR in bookTypeDs.Tables[0].Rows)
{
DataRow newDR = newDataTable.NewRow();
newDR[0] = oldDR["bookTypeId"].ToString();
newDR[1] = oldDR["bookTypeName"].ToString();
newDataTable.Rows.InsertAt(newDR, newDataTable.Rows.Count);
}
// Add your 'Select an item' option at the top
DataRow dr = newDataTable.NewRow();
dr[0] = "0";
dr[1] = "请选择";
newDataTable.Rows.InsertAt(dr, 0);
this.cb_bookType.DataSource = newDataTable;
this.cb_bookType.DisplayMember = "bookTypeName";
this.cb_bookType.ValueMember = "bookTypeId";
}
private void LBHome_Click(object sender, EventArgs e)
{
BindData("");
}
private void LBUp_Click(object sender, EventArgs e)
{
BindData("up");
}
private void LBNext_Click(object sender, EventArgs e)
{
BindData("next");
}
private void LBEnd_Click(object sender, EventArgs e)
{
BindData("end");
}
private void Btn_Update_Click(object sender, EventArgs e)
{
if (((System.Windows.Forms.BaseCollection)(dataGridView_Book.SelectedRows)).Count != 1)
{
MessageBox.Show("请选择一条数据", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
}
else
{
String barcode = this.dataGridView_Book.CurrentRow.Cells[0].Value.ToString();
FrmEditBook frmEditBook = new FrmEditBook(barcode,this);
frmEditBook.ShowDialog();
}
}
private void Btn_Del_Click(object sender, EventArgs e)
{
if (((System.Windows.Forms.BaseCollection)(dataGridView_Book.SelectedRows)).Count != 1)
{
MessageBox.Show("请选择一条数据", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
}
else
{
if ( MessageBox.Show("确定删除吗?", "删除提示", MessageBoxButtons.OKCancel) == DialogResult.OK)
{
String barcode = this.dataGridView_Book.CurrentRow.Cells[0].Value.ToString();
if (BLL.bllBook.DelBook(barcode))
MessageBox.Show("图书删除成功!");
else
MessageBox.Show("图书删除失败!");
BindData("refresh");
}
}
}
}
}
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