[DevExpress]GridControl分页的实现
Posted 厦门德仔
tags:
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添加两个组件：BindingNavigator和BindingSource
代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Text;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using DZAMS.DBUtility;
namespace DZAMS.Demo
{
public partial class GridPage_Frm : DevExpress.XtraEditors.XtraForm
{
public DataTable dt = new DataTable();
StoreProcedure sp;
private int pageSize = 10; //每页显示行数
private int nMax = 0; //总记录数
private int pageCount = 0; //页数＝总记录数/每页显示行数
private int pageCurrent = 0; //当前页号
private DataSet ds = new DataSet();
private DataTable dtInfo = new DataTable();
public GridPage_Frm()
{
InitializeComponent();
}
private void GridPage_Frm_Load(object sender, EventArgs e)
{
string strQuery = string.Format("SELECT Id, UserCode, UserName, RoleName, Ip, Mac, LoginTime FROM DZ_LoginLog");
dt = SqlHelper.ExecuteDataset(SqlHelper.conn, CommandType.Text, strQuery.ToString()).Tables[0];
gridControl1.DataSource = dt;
string strConn = "SERVER=(local);DATABASE=DZ;UID=sa;PWD=XXXX"; //数据库连接字符串
SqlConnection conn = new SqlConnection(strConn);
conn.Open();
string strSql = "SELECT count(*) as num FROM DZ_LoginLog";
SqlDataAdapter sda = new SqlDataAdapter(strSql, conn);
sda.Fill(ds, "ds");
conn.Close();
nMax = Convert.ToInt32(ds.Tables[0].Rows[0]["num"].ToString());
lblTotalCount.Text = nMax.ToString();
lblPageSize.Text = pageSize.ToString();
sp = new StoreProcedure("Pr_Monitor_Pagination", strConn);
dtInfo = sp.ExecuteDataTable("DZ_LoginLog", "Id", "Id desc", pageCurrent++, pageSize);
InitDataSet();
}
private void InitDataSet()
{
pageCount = (nMax / pageSize); //计算出总页数
if ((nMax % pageSize) > 0) pageCount++;
pageCurrent = 1; //当前页数从1开始
LoadData();
}
private void LoadData()
{
lblPageCount.Text = "/"+pageCount.ToString();
txtCurrentPage.Text = Convert.ToString(pageCurrent);
this.bdsInfo.DataSource = dtInfo;
this.bdnInfo.BindingSource = bdsInfo;
this.gridControl1.DataSource = bdsInfo;
}
private void bdnInfo_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
{
if (e.ClickedItem.Text == "导出当前页")
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Title = "导出Excel";
saveFileDialog.Filter = "Excel文件(*.xls)|*.xls";
DialogResult dialogResult = saveFileDialog.ShowDialog(this);
if (dialogResult == DialogResult.OK)
{
DevExpress.XtraPrinting.XlsExportOptions options = new DevExpress.XtraPrinting.XlsExportOptions();
gridControl1.ExportToXls(saveFileDialog.FileName, options);
// gridControl1.ExportToExcelOld(saveFileDialog.FileName);
DevExpress.XtraEditors.XtraMessageBox.Show("保存成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
if (e.ClickedItem.Text == "关闭")
{
this.Close();
}
if (e.ClickedItem.Text == "首页")
{
pageCurrent--;
if (pageCurrent <= 0)
{
MessageBox.Show("已经是首页，请点击“下一页”查看！");
return;
}
else
{
pageCurrent = 1;
dtInfo = sp.ExecuteDataTable("DZ_LoginLog", "Id", "Id desc", pageCurrent, pageSize);
}
}
if (e.ClickedItem.Text == "上一页")
{
pageCurrent--;
if (pageCurrent <= 0)
{
MessageBox.Show("已经是第一页，请点击“下一页”查看！");
return;
}
else
{
dtInfo = sp.ExecuteDataTable("DZ_LoginLog", "Id", "Id desc", pageCurrent, pageSize);
}
}
if (e.ClickedItem.Text == "下一页")
{
pageCurrent++;
if (pageCurrent > pageCount)
{
MessageBox.Show("已经是最后一页，请点击“上一页”查看！");
return;
}
else
{
dtInfo = sp.ExecuteDataTable("DZ_LoginLog", "Id", "Id desc", pageCurrent, pageSize);
}
}
if (e.ClickedItem.Text == "尾页")
{
pageCurrent++;
if (pageCurrent > pageCount)
{
MessageBox.Show("已经是尾页，请点击“上一页”查看！");
return;
}
else
{
pageCurrent = pageCount;
dtInfo = sp.ExecuteDataTable("DZ_LoginLog", "Id", "Id desc", pageCount, pageSize);
}
}
LoadData();
}
}
}StoreProcedure类：
public class StoreProcedure
{
// 存储过程名称。
private string _name;
// 数据库连接字符串。
private string _conStr;
// 构造函数
// sprocName: 存储过程名称；
// conStr: 数据库连接字符串。
public StoreProcedure(string sprocName, string conStr)
{
_conStr = conStr;
_name = sprocName;
}
// 执行存储过程，不返回值。
// paraValues: 参数值列表。
// return: void
public void ExecuteNoQuery(params object[] paraValues)
{
using (SqlConnection con = new SqlConnection(_conStr))
{
SqlCommand comm = new SqlCommand(_name, con);
comm.CommandType = CommandType.StoredProcedure;
AddInParaValues(comm, paraValues);
con.Open();
comm.ExecuteNonQuery();
con.Close();
}
}
// 执行存储过程返回一个表。
// paraValues: 参数值列表。
// return: DataTable
public DataTable ExecuteDataTable(params object[] paraValues)
{
SqlCommand comm = new SqlCommand(_name, new SqlConnection(_conStr));
comm.CommandType = CommandType.StoredProcedure;
AddInParaValues(comm, paraValues);
SqlDataAdapter sda = new SqlDataAdapter(comm);
DataTable dt = new DataTable();
sda.Fill(dt);
return dt;
}
// 执行存储过程，返回SqlDataReader对象，
// 在SqlDataReader对象关闭的同时，数据库连接自动关闭。
// paraValues: 要传递给给存储过程的参数值类表。
// return: SqlDataReader
public SqlDataReader ExecuteDataReader(params object[] paraValues)
{
SqlConnection con = new SqlConnection(_conStr);
SqlCommand comm = new SqlCommand(_name, con);
comm.CommandType = CommandType.StoredProcedure;
AddInParaValues(comm, paraValues);
con.Open();
return comm.ExecuteReader(CommandBehavior.CloseConnection);
}
// 获取存储过程的参数列表。
private ArrayList GetParas()
{
SqlCommand comm = new SqlCommand("dbo.sp_sproc_columns_90",
new SqlConnection(_conStr));
comm.CommandType = CommandType.StoredProcedure;
comm.Parameters.AddWithValue("@procedure_name", (object)_name);
SqlDataAdapter sda = new SqlDataAdapter(comm);
DataTable dt = new DataTable();
sda.Fill(dt);
ArrayList al = new ArrayList();
for (int i = 0; i < dt.Rows.Count; i++)
{
al.Add(dt.Rows[i][3].ToString());
}
return al;
}
// 为 SqlCommand 添加参数及赋值。
private void AddInParaValues(SqlCommand comm, params object[] paraValues)
{
comm.Parameters.Add(new SqlParameter("@RETURN_VALUE", SqlDbType.Int));
comm.Parameters["@RETURN_VALUE"].Direction =
ParameterDirection.ReturnValue;
if (paraValues != null)
{
ArrayList al = GetParas();
for (int i = 0; i < paraValues.Length; i++)
{
comm.Parameters.AddWithValue(al[i + 1].ToString(),
paraValues[i]);
}
}
}
}存储过程：
ALTER procedure [dbo].[Pr_Monitor_Pagination] -- ============================================= == Paging == ============================================= --Author: Lee --Create date: 2010\06\11 --Parameter: -- 1.Tables :The Name Of Table or view -- 2.PrimaryKey :Primary Key -- 3.Sort :Ordering Statement，Without Order By, For Example：NewsID Desc,OrderRows Asc -- 4.CurrentPage :The Page Number Of Current page -- 5.PageSize :The Size Of One Page‘s Group -- 6.Fields :The Field Of You Needed -- 7.Filter :Where Condition，Without Where -- 8.Group :Group Condition，Without Group By -- 9.GetCount :Return The Number Of All, Not Zero --Updates: -- 2010\06\09 Create Procedure. -- ======================================================================================================== @Tables varchar(600), @PrimaryKey varchar(100), @Sort varchar(200)=null, @CurrentPage bigint=1, @PageSize bigint=10, @Fields varchar(1000)=‘*‘, @Filter varchar(1000)=null, @Group varchar(1000)=null, @GetCount bit=0 as if(@GetCount=0) begin /*Ordering Of Default */ if @Sort is null or @Sort=‘‘ set @[email protected] declare @SortTable varchar(100) declare @SortName varchar(100) declare @strSortColumn varchar(200) declare @operator char(2) declare @type varchar(100) declare @prec int /*Setting Condition Of Ordering*/ if charindex(‘desc‘,@Sort)>0 begin set @strSortColumn=replace(@Sort,‘desc‘,‘‘) set @operator=‘<=‘ end else begin if charindex(‘asc‘,@Sort)=0 set @strSortColumn=replace(@Sort,‘asc‘,‘‘) set @operator=‘>=‘ end if charindex(‘.‘,@strSortColumn)>0 begin set @SortTable=substring(@strSortColumn,0,charindex(‘.‘,@strSortColumn)) set @SortName=substring(@strSortColumn,charindex(‘.‘,@strSortColumn)+1,len(@strSortColumn)) end else begin set @[email protected] set @[email protected] end select @type=t.name,@prec=c.prec from sysobjects o join syscolumns c on o.id=c.id join systypes t on c.xusertype=t.xusertype where [email protected] and [email protected] if charindex(‘char‘,@type)>0 set @[email protected]+‘(‘+cast(@prec as varchar)+‘)‘ declare @strPageSize varchar(50) declare @strStartRow varchar(50) declare @strFilter varchar(1000) declare @strSimpleFilter varchar(1000) declare @strGroup varchar(1000) /*CurrentPage Of Default*/ if @CurrentPage<1 set @CurrentPage=1 /*Setting Paging param*/ set @strPageSize=cast(@PageSize as varchar(50)) set @strStartRow=cast(((@CurrentPage-1)*@PageSize+1) as varchar(50)) /*Condition Of Filter And Group*/ if @Filter is not null and @Filter!=‘‘ begin set @strFilter=‘ where ‘[email protected]+‘ ‘ set @strSimpleFilter=‘ and ‘[email protected] +‘ ‘ end else begin set @strSimpleFilter=‘‘ set @strFilter=‘‘ end if @Group is not null and @Group!=‘‘ set @strGroup=‘ group by ‘[email protected]+‘ ‘ else set @strGroup=‘‘ exec(‘ declare @SortColumn ‘+ @type + ‘ set RowCount ‘ + @strStartRow+ ‘ select @SortColumn=‘ + @strSortColumn + ‘ from ‘ + @Tables+ @strFilter + ‘ ‘ + @strGroup + ‘ Order by ‘ + @Sort+ ‘ set rowcount ‘ + @strPageSize + ‘ select ‘ + @Fields + ‘ from ‘ + @Tables + ‘ where ‘ + @strSortColumn + @operator+ ‘@SortColumn ‘ + @strSimpleFilter + ‘ ‘ + @strGroup + ‘ Order by ‘ + @Sort + ‘ ‘) end else begin declare @strSQL varchar(5000) if @Filter !=‘‘ set @strSQL = ‘select count(‘ + @PrimaryKey + ‘) as Total from [‘ + @Tables + ‘] where ‘ + @Filter else set @strSQL = ‘select count(‘ + @PrimaryKey + ‘) as Total from [‘ + @Tables + ‘]‘ exec(@strSQL) end
效果：
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