卓尔高考网

[DevExpress]GridControl分页的实现

篇首语:本文由小编为大家整理,主要介绍了[DevExpress]GridControl分页的实现相关的知识,希望对你有一定的参考价值。

加入两个组件: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開始            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; } // 运行存储过程,不返回值。 // paraValues: 參数值列表。 // 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(); } } // 运行存储过程返回一个表。 // paraValues: 參数值列表。 // 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; } // 运行存储过程。返回SqlDataReader对象。 // 在SqlDataReader对象关闭的同一时候。数据库连接自己主动关闭。

// paraValues: 要传递给给存储过程的參数值类表。 // 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); } // 获取存储过程的參数列表。 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 加入參数及赋值。 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: 2010611--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:--201069 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:










以上是关于[DevExpress]GridControl分页的实现的主要内容,如果未能解决你的问题,请参考以下文章

您可能还会对下面的文章感兴趣: