DevExpress中如何实现GridControl的分页功能(组件)
2014-01-21 14:23
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DevExpress中如何实现GridControl的分页功能(组件)
简介:DevExpress中如何实现GridControl的分页功能(组件),此文主要是在之前文章里的代码基础上重新封装成的组件
主要是利用DataNavigator和GridControl组合,自定义事件实现分页功能
接下来,我们就去实现分页功能,先看下效果图:
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
整个分页操作,基本分三步:
一:界面层
二:实体层
三:代码层
四:调用
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
一:界面层,如图:
新建用户控件，命名：PageUpControl，在Designer.cs设计文件中添加如下代码：
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
二:实体层
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
三:代码层
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
四:调用
如文章开头第一张效果图所述,当我就行查询操作时,也就是调用分页和绑定数据,需要做的操作,如下:
分页数据集：
说明:此处只需要指定你自定义的条件就可以了,以上代码展示的只是文章图一的实现
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
好了,到这,我们的所有操作就完成了,来看下我们运行的分页效果图:
简介:DevExpress中如何实现GridControl的分页功能(组件),此文主要是在之前文章里的代码基础上重新封装成的组件
主要是利用DataNavigator和GridControl组合,自定义事件实现分页功能
接下来,我们就去实现分页功能,先看下效果图:
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
整个分页操作,基本分三步:
一:界面层
二:实体层
三:代码层
四:调用
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
一:界面层,如图:
新建用户控件，命名：PageUpControl，在Designer.cs设计文件中添加如下代码：
namespace BDSS.Component
{
partial class PageUpControl
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Component Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.nvgtDataPager = new DevExpress.XtraEditors.DataNavigator();
this.SuspendLayout();
//
// nvgtDataPager
//
this.nvgtDataPager.Buttons.Append.Visible = false;
this.nvgtDataPager.Buttons.CancelEdit.Visible = false;
this.nvgtDataPager.Buttons.EndEdit.Visible = false;
this.nvgtDataPager.Buttons.First.Hint = "首页";
this.nvgtDataPager.Buttons.First.Visible = false;
this.nvgtDataPager.Buttons.Last.Hint = "末页";
this.nvgtDataPager.Buttons.Last.Visible = false;
this.nvgtDataPager.Buttons.Next.Visible = false;
this.nvgtDataPager.Buttons.NextPage.Hint = "下一页";
this.nvgtDataPager.Buttons.NextPage.Visible = false;
this.nvgtDataPager.Buttons.Prev.Visible = false;
this.nvgtDataPager.Buttons.PrevPage.Hint = "上一页";
this.nvgtDataPager.Buttons.PrevPage.Visible = false;
this.nvgtDataPager.Buttons.Remove.Visible = false;
this.nvgtDataPager.CustomButtons.AddRange(new DevExpress.XtraEditors.NavigatorCustomButton[] {
new DevExpress.XtraEditors.NavigatorCustomButton(-1, 0, true, true, "首页", "首页"),
new DevExpress.XtraEditors.NavigatorCustomButton(-1, 1, true, true, "上一页", "上一页"),
new DevExpress.XtraEditors.NavigatorCustomButton(-1, 4, true, true, "下一页", "下一页"),
new DevExpress.XtraEditors.NavigatorCustomButton(-1, 5, true, true, "末页", "末页")});
this.nvgtDataPager.Dock = System.Windows.Forms.DockStyle.Fill;
this.nvgtDataPager.Location = new System.Drawing.Point(0, 0);
this.nvgtDataPager.Margin = new System.Windows.Forms.Padding(300, 3, 300, 3);
this.nvgtDataPager.Name = "nvgtDataPager";
this.nvgtDataPager.ShowToolTips = true;
this.nvgtDataPager.Size = new System.Drawing.Size(800, 42);
this.nvgtDataPager.TabIndex = 18;
this.nvgtDataPager.Text = "dataNavigator1";
this.nvgtDataPager.TextLocation = DevExpress.XtraEditors.NavigatorButtonsTextLocation.Center;
this.nvgtDataPager.TextStringFormat = "第 {0}页 ,共 {1}";
this.nvgtDataPager.ButtonClick += new DevExpress.XtraEditors.NavigatorButtonClickEventHandler(this.nvgtDataPager_ButtonClick_1);
//
// PageUpControl
//
this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 14F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.Controls.Add(this.nvgtDataPager);
this.Name = "PageUpControl";
this.Size = new System.Drawing.Size(800, 42);
this.ResumeLayout(false);
}
#endregion
private DevExpress.XtraEditors.DataNavigator nvgtDataPager;
}
}说明：本文用户控件是在 BDSS.Component 命名空间下创建的-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
二:实体层
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace BDSS.Model.BLL.Model
{
public class SQLParams
{
Oracle.DataAccess.Client.OracleParameter[] _oralceParameter;
string _sql;
public Oracle.DataAccess.Client.OracleParameter[] OracleParameteies
{
get
{
return _oralceParameter;
}
set
{
_oralceParameter = value;
}
}
public string SQL
{
get
{
return _sql;
}
set
{
_sql = value;
}
}
}
}说明：此类是在BDSS.Model.BLL.Model命名空间下创建的-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
三:代码层
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Views.Grid;
using BDSS.Model.BLL.Model;
namespace BDSS.Component
{
public partial class PageUpControl : DevExpress.XtraEditors.XtraUserControl
{
public PageUpControl()
{
InitializeComponent();
nvgtDataPager.Buttons.CustomButtons[0].Enabled = false;
nvgtDataPager.Buttons.CustomButtons[1].Enabled = false;
nvgtDataPager.Buttons.CustomButtons[2].Enabled = false;
nvgtDataPager.Buttons.CustomButtons[3].Enabled = false;
nvgtDataPager.TextStringFormat = string.Format("");
}
private GridControl myControl;
public GridControl MyControl
{
get { return myControl; }
set { myControl = value; }
}
private int pageIndex;
/// <summary>
/// 当前页数
/// </summary>
public int PageIndex
{
get { return pageIndex; }
set { pageIndex = value; }
}
/// <summary>
/// 总页数
/// </summary>
public int PageCount = 0;
private int pagesize;
/// <summary>
/// 页行数
/// </summary>
public int Pagesize
{
get { return pagesize; }
set { pagesize = value; }
}
private int pageRow;
public int PageRow
{
get { return pageRow; }
set { pageRow = value; }
}
private int startIndex;
private int endIndex;
public GetMethod Method;
public ParamMethod MyParamMethod;
public SQLParams OracleParams;
public string StrWhere = "";
public string StrOrder = "";
public void GetDataSet(GetMethod myMethod,string strwhere,string strOrder)
{
Method = myMethod;
StrWhere = strwhere;
StrOrder = strOrder;
BindPageGridList();
DevExpress.XtraGrid.Views.Grid.GridView gv = (GridView)MyControl.Views[0];
//查询为空提示
gv.CustomDrawEmptyForeground += new DevExpress.XtraGrid.Views.Base.CustomDrawEventHandler(gv_CustomDrawEmptyForeground);
}
public void GetDataSet(ParamMethod myMethod,SQLParams oracleParams, string strOrder)
{
MyParamMethod = myMethod;
this.OracleParams = oracleParams;
StrOrder = strOrder;
BindPageGridList();
DevExpress.XtraGrid.Views.Grid.GridView gv = (GridView)MyControl.Views[0];
//查询为空提示
gv.CustomDrawEmptyForeground += new DevExpress.XtraGrid.Views.Base.CustomDrawEventHandler(gv_CustomDrawEmptyForeground);
}
public void gv_CustomDrawEmptyForeground(object sender, DevExpress.XtraGrid.Views.Base.CustomDrawEventArgs e)
{
string s="";
if (PageRow == 0)
{
s = "当前查询没有返回结果.";
nvgtDataPager.Buttons.CustomButtons[0].Enabled = false;
nvgtDataPager.Buttons.CustomButtons[1].Enabled = false;
nvgtDataPager.Buttons.CustomButtons[2].Enabled = false;
nvgtDataPager.Buttons.CustomButtons[3].Enabled = false;
nvgtDataPager.TextStringFormat = string.Format("");
}
Font font = new Font("Tahoma", 10, FontStyle.Bold);
Rectangle r = new Rectangle(e.Bounds.Left + 5, e.Bounds.Top + 5, e.Bounds.Width - 5,
e.Bounds.Height - 5);
e.Graphics.DrawString(s, font, Brushes.Black, r);
}
private void ShowEvent(string eventString, NavigatorButtonBase button)
{
//string type = button.ButtonType.ToString();
NavigatorCustomButton btn = (NavigatorCustomButton)button;
string type = btn.Tag.ToString();
if (type == "首页")
{
PageIndex = 1;
}
if (type == "下一页")
{
PageIndex++;
}
if (type == "末页")
{
PageIndex = PageCount;
}
if (type == "上一页")
{
PageIndex--;
}
BindPageGridList();
}
public void BindPageGridList()
{
nvgtDataPager.Buttons.CustomButtons[0].Enabled = true;
nvgtDataPager.Buttons.CustomButtons[1].Enabled = true;
nvgtDataPager.Buttons.CustomButtons[2].Enabled = true;
nvgtDataPager.Buttons.CustomButtons[3].Enabled = true;
//记录获取开始数
startIndex = (PageIndex - 1) * Pagesize + 1;
//结束数
endIndex = PageIndex * Pagesize;
//获取总页数
if (PageRow % Pagesize > 0)
{
PageCount = PageRow / Pagesize + 1;
}
else
{
PageCount = PageRow / Pagesize;
}
if (PageIndex == 1)
{
nvgtDataPager.Buttons.CustomButtons[0].Enabled = false;
nvgtDataPager.Buttons.CustomButtons[1].Enabled = false; ;
}
//最后页时获取真实记录数
if (PageCount == PageIndex)
{
endIndex = PageRow;
nvgtDataPager.Buttons.CustomButtons[2].Enabled = false;
nvgtDataPager.Buttons.CustomButtons[3].Enabled = false;
}
if (true)
{
}
if (MyParamMethod != null)
{
MyControl.DataSource = MyParamMethod(OracleParams, StrOrder, startIndex, endIndex).Tables[0];
}
else
{
MyControl.DataSource = Method(StrWhere, StrOrder, startIndex, endIndex).Tables[0];
}
nvgtDataPager.TextStringFormat = string.Format("第 {0}页, 共 {1}页", PageIndex, PageCount);
}
public delegate DataSet GetMethod(string strWhere, string orderby, int startIndex, int endIndex);
public delegate DataSet ParamMethod(SQLParams oralceParams,string orderby, int startIndex, int endIndex);
private void nvgtDataPager_ButtonClick_1(object sender, NavigatorButtonClickEventArgs e)
{
ShowEvent("ButtonClick", e.Button);
}
}
}-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
四:调用
如文章开头第一张效果图所述,当我就行查询操作时,也就是调用分页和绑定数据,需要做的操作,如下:
pageUpControl1.MyControl = GridControl控件名称; pageUpControl1.PageRow =总条数; pageUpControl1.PageIndex = 页索引(起始页); pageUpControl1.Pagesize = 每页条数; pageUpControl1.GetDataSet(分页数据集, 查询条件,排序条件);
分页数据集：
/// <summary>
/// 分页获取数据列表
/// </summary>
public DataSet GetListByPage(string strWhere, string orderby, int startIndex, int endIndex)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("SELECT * FROM ( ");
strSql.Append(" SELECT ROW_NUMBER() OVER (");
if (!string.IsNullOrEmpty(orderby.Trim()))
{
strSql.Append("order by T." + orderby);
}
else
{
strSql.Append("order by T.TASK_BEGIN_DATE desc");
}
strSql.Append(")AS Rowss, T.ID,T.TASKORDER_ID,T.TASKORDER_CREATER,T.SATELLITE_TYPE_CODE,T.TASKORDER_TYPE_CODE,T.TASK_PRIORITY_CODE,T.RELEASE_DATE,T.RECEIVE_DATE,T.TASK_BEGIN_DATE,T.TASK_END_DATE,T.DATA_PUSH_PATH,T.AREA_CODE,T.TASKORDER_STATUS,T.TASKORDER_COMMENT.getStringVal() TASKORDER_COMMENT,T.STATUS,T.CREATE_USERID from TL_TASK_ORDER_LOG T ");
if (!string.IsNullOrEmpty(strWhere.Trim()))
{
strSql.Append(" WHERE " + strWhere);
}
strSql.Append(" ) TT");
strSql.AppendFormat(" WHERE TT.Rowss between {0} and {1}", startIndex, endIndex);
return _DbHelperOra.Query(strSql.ToString());
}说明:此处只需要指定你自定义的条件就可以了,以上代码展示的只是文章图一的实现
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
好了,到这,我们的所有操作就完成了,来看下我们运行的分页效果图:
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