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客户端回调实现gridview无刷新分页_asp.net技巧
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发布于：2010-12-15 21:05
 | |  |  | 由于客户对速度和性能上的需求越来越变态,而数据量一天天的庞大,因此本人产生了数据的查询和分页完全由客户端回调来实现。想法看上去复杂，实现起来也不难。废话不多说，看程式吧。 一、存储过程包头：create or replace package H_QUERYPACK is -- Author : Evorul
-- Created : 2007-3-29
-- Purpose : 查询机构表
-- Public type declarations
type MYCURSOR is REF CURSOR;
PROCEDURE QUERYLOG (RET_CURSOR OUT MYCURSOR,ERRORCODE OUT INT,p_logID int,p_StartTime Date,p_EndTime Date,p_Operator varchar2 ,p_OrderField varchar2 ,
p_Desc int,p_PageSize Int,p_PageIndex Int,p_RecordCount Out Int);end H_QUERYPACK;
包体： create or replace package body H_QUERYPACK Is
-- Author : Evorul
-- Created : 2007-3-29
-- Purpose : 查询
-- 查询公司,分页用
PROCEDURE QUERYLOG (RET_CURSOR OUT MYCURSOR,ERRORCODE OUT INT,p_logID int,p_StartTime Date,p_EndTime Date,p_Operator varchar2 ,p_OrderField varchar2 ,
p_Desc int,p_PageSize Int,p_PageIndex Int,p_RecordCount Out Int)
AS
v_sql varchar2(3000);
v_sqlcount varchar2(3000);
v_orderfield varchar2(100);
v_order VARCHAR2(5); --顺序
v_count int;
v_heiRownum int;
v_lowRownum int;
BEGIN
ERRORCODE:=0; v_sql:=select * from LOG Where 1=1 ; if(p_logID <> 0)then
v_sql := v_sql || and id = || TO_CHAR(p_logID);
end if; IF p_Operator Is Not Null Then then
v_sql := v_sql || And operator LIKE % || RTRIM(LTRIM(p_Operator))||%;
end if; v_sql := v_sql || and (TO_CHAR(time,YYYYMMDD) between || to_char(p_StartTime, YYYYMMDD) || and || to_char(p_EndTime, YYYYMMDD) ||);
----取记录总数
v_sqlcount := select count(*) from ( || v_sql || );
execute immediate v_sqlcount into v_count;
p_RecordCount := v_count; --排序字段
IF p_OrderField IS NOT NULL THEN
v_orderfield:=p_OrderField;
Else
v_orderfield:=ID;
END IF;
--是否降序
IF p_Desc <>0 THEN
v_order:= ASC;
Else
v_order:= DESC;
END IF;
v_sql:=v_sql || ORDER BY || v_orderfield || v_order;
----执行分页查询
v_heiRownum := p_PageIndex * p_PageSize;
v_lowRownum := v_heiRownum - p_PageSize + 1; v_sql := SELECT * FROM (
SELECT A.*, rownum rn FROM (|| v_sql ||) A WHERE rownum <= || to_char(v_heiRownum) || ) B WHERE rn >= || to_char(v_lowRownum) ; OPEN RET_CURSOR FOR v_sql; EXCEPTION
WHEN NO_DATA_FOUND THEN
ERRORCODE:=9999;
WHEN OTHERS THEN
ERRORCODE:=9999;
END QUERYLOG;
END H_QUERYPACK;
二、程式DataAccess.cs using System;
using System.Data;
using System.Data.OracleClient;
using System.Collections;
using System.Collections.Specialized;/**////
///数据层 author: EvoRul date:2007-03-29
///
public class DataAccess
...{ /**////
/// 返回数据库连接字符串
///
public static String DatabaseConnectionString
...{
get
...{
NameValueCollection configSettings = (NameValueCollection)System.Configuration.ConfigurationManager.GetSection("appSettings");
return configSettings["connectionString"];
}
} /**////
/// 返回每一页显示的纪录数
///
public static int RowsPerPage
...{
get
...{
NameValueCollection configSettings = (NameValueCollection)System.Configuration.ConfigurationManager.GetSection("appSettings");
return Convert.ToInt32(configSettings["rowsPerPage"]);
}
} /**////
/// 获取特定日志集合
///
/// 日志类型
/// 操作人
/// 排序字段
/// 是否升序 0-降序,1-升
/// 页码
/// 页行数
/// 符合条件的总记录数
///
public static ArrayList QueryLog(string strOperator,DateTime dtStartTime,DateTime dtEndTime, string strOrderField,
int intASC, int PageIndex, int rowCount, out int recordSum)
...{
// 返回集合
ArrayList myArrayList = new ArrayList(); // 创建连接
OracleConnection myConnection = new OracleConnection(DatabaseConnectionString); try
...{
// 打开连接
myConnection.Open();
}
catch (Exception ex)
...{
throw (ex);
} try
...{
// 创建存储过程
OracleCommand myCommand = new OracleCommand("H_QUERYPACK.QUERYLOG", myConnection);
myCommand.CommandType = CommandType.StoredProcedure;
OracleDataReader dr; // ============================== 参数定义 ============================== // 返回值
myCommand.Parameters.Add("RET_CURSOR", OracleType.Cursor);
myCommand.Parameters["RET_CURSOR"].Direction = ParameterDirection.Output;
OracleParameter ret = myCommand.Parameters.Add("ERRORCODE", OracleType.Int32);
ret.Direction = ParameterDirection.Output; OracleParameter retCountSum = myCommand.Parameters.AddWithValue("p_RecordCount", OracleType.Int32);
retCountSum.Direction = ParameterDirection.Output; // 编号
myCommand.Parameters.AddWithValue("p_logID", OracleType.Int32).Value = 0; // 用户编号
myCommand.Parameters.AddWithValue("p_Operator", OracleType.VarChar).Value = strOperator; // 时间下限
myCommand.Parameters.AddWithValue("p_StartTime", OracleType.DateTime).Value = dtStartTime; // 时间上限
myCommand.Parameters.AddWithValue("p_EndTime", OracleType.DateTime).Value =dtEndTime; // 排序字段
myCommand.Parameters.AddWithValue("p_OrderField", OracleType.VarChar).Value = strOrderField; // 怎么排序
myCommand.Parameters.AddWithValue("p_Desc", OracleType.Int32).Value = intASC; // 每页行数
myCommand.Parameters.AddWithValue("p_PageSize", OracleType.Int32).Value = rowCount; //页码
myCommand.Parameters.AddWithValue("p_PageIndex", OracleType.Int32).Value = PageIndex; // ============================ 参数定义完毕 ============================ // 执行存储过程
dr = myCommand.ExecuteReader(); // 执行未成功
if (Convert.ToInt32(ret.Value) != 0)
throw new Exception("执行存储过程出错!"); // 总记录数
recordSum = Convert.ToInt32(retCountSum.Value); while (dr.Read())
...{
// 创建新日志
Log log = new Log(); //操作业务类型
if (dr["operationtype"] != DBNull.Value)
...{
log.OperationType = Convert.ToString(dr["operationtype"]);
}
// 时间
if (dr["time"] != DBNull.Value)
log.Time = Convert.ToDateTime(dr["time"]); // 用户
if (dr["operator"] != DBNull.Value)
...{
log.Operator = Convert.ToString(dr["operator"]);
} // 信息
if (dr["info"] != DBNull.Value)
log.Info = Convert.ToString(dr["info"]); // 加入返回集合
myArrayList.Add(log);
} dr.Close();
return myArrayList;
}
catch (Exception ex)
...{
throw (ex);
}
finally
...{
myConnection.Close();
}
}
} DataLogic.cs using System;
using System.Data;
using System.Configuration;
using System.Collections;/**////
/// 业务逻辑层 author: EvoRul date:2007-03-29
///
public class DataLogic
...{
public DataLogic()
...{
} public static int recordSum = 0;
/**////
/// 查询日志
///
/// 操作人
/// 时间范围下限
/// 时间上限
/// 页码
///
public static IEnumerable GetLogData(string strOperator,DateTime dtStarTime,DateTime dtEndTime, string Pageid)
...{
return Log.GetList(strOperator,dtStarTime,dtEndTime,"time",1, Convert.ToInt32(Pageid),DataAccess.RowsPerPage,out recordSum);
}
} Log.cs using System;
using System.Data;
using System.Collections;/**////
/// 日志类
///
public class Log
...{
// ============================== 成员 ============================== protected string operationType;
/**////
/// 时间
///
protected DateTime time = new DateTime(); /**////
/// 用户
///
protected string m_operator; /**////
/// 信息
///
protected string info = ""; // ============================== 属性 ============================== public string OperationType
...{
get ...{ return operationType; }
set ...{ operationType = value; }
}
/**////
/// 时间
///
public DateTime Time
...{
get ...{ return time; }
set ...{ time = value; }
} /**////
/// 用户
///
public string Operator
...{
get ...{ return m_operator; }
set ...{ m_operator = value; }
} /**////
/// 信息
///
public string Info
...{
get ...{ return info; }
set ...{ info = value; }
} // ============================== 方法 ============================== /**////
/// 创建空日志实例
///
public Log()
...{
} /**////
/// 新增日志
///
public void Add()
...{
try
...{
// 暂不支持该方法
throw new Exception("新增日志");
}
catch (Exception ex)
...{
throw (ex);
}
} /**////
/// 修改日志（不支持）
///
public void Modify()
...{
// 暂不支持该方法
throw new Exception("修改日志");
} /**////
/// 删除日志
///
public void Del()
...{
// 暂不支持该方法
throw new Exception("修改日志");
} /**////
/// 获取特定的日志集
///
/// 操作人
/// 开始时间
/// 结束时间
/// 排序字段
/// 0-降序,1-升序
/// 页码
/// 页行数
/// 总记录数
///
public static ArrayList GetList(string strOperator,DateTime dtStartTime,DateTime dtEndTime,string strOrderField,int intASC, int PageIndex, int rowCount, out int recordSum)
...{
return DataAccess.QueryLog(strOperator,dtStartTime,dtEndTime,strOrderField, intASC, PageIndex, rowCount, out recordSum);
}
} 前台页 Default.aspx
...
body {...}{
font-size: 12px;
color: #525252;
}
td {...}{
font-size: 12px;
color: #525252;
}
th {...}{
font-size: 12px
}
a:link {...}{
color: #000000; text-decoration: none
}
a:visited {...}{
color: #525252; text-decoration: none
}
a:hover {...}{
color: #0095A7; text-decoration: underline
}
td.alt_1 {...}{
border-top: 1px solid #d6d6d6;
border-right: 1px solid #d6d6d6;
font-size:12px;
color: #4f6b72;
}
td.alt_2 {...}{
border-top: 1px solid #d6d6d6;
border-right: 1px solid #d6d6d6;
}
td.alt_3 {...}{
border-left: 1px solid #d6d6d6;
border-bottom: 1px solid #d6d6d6;
}
td.alt_4 {...}{
border-left: 1px solid #d6d6d6;
border-right: 1px solid #d6d6d6;
}
...
//author: EvoRul date:2007-03-25
var PageIndex=1;
function QueryServer(objOperator,objStartTime,objEndTime,intIndex,boolReset)
...{
context = gridspan;
context.innerHTML = " 数据加载中...";
arg = "ServerMethodQuery|" + objOperator.value.replace(/$/g,"")+"$"+ objStartTime.value.replace(/$/g,"")+"$"+ objEndTime.value.replace(/$/g,"") +"$"+ intIndex.toString().replace(/$/g,"")+"$"+ boolReset.toString().replace(/$/g,"");
;
} function ReceiveServerData(result, context)
...{
context.innerHTML = (result.split($))[0];
var t1=document.getElementById("RecordSum");
var t2=document.getElementById("PageSum");
var t3=document.getElementById("CurrentPage");
var t5=document.getElementById("LinkUp");
var t6=document.getElementById("Linkdown");
var t7=document.getElementById("DownListIndex");
t1.innerHTML = (result.split($))[1];
t2.innerHTML = (result.split($))[2];
t3.innerHTML = (result.split($))[3];
PageIndex=eval((result.split($))[3]);
if(PageIndex>1)
...{
t5.innerHTML="上一页";
}
else
t5.innerHTML = "上一页";
if(PageIndex4)
...{
var t4=document.getElementById("SpanIndex");
t4.innerHTML = (result.split($))[4];
}
t7.value=PageIndex;
}
function functionPageload()
...{
if(document.readyState!="complete") return;
context = gridspan;
arg = "ServerMethodQuery|" +"$"+"1753-1-1"+ "$"+"9999-12-31"+ "$"+ "1"+"$"+ "true";
;
//页面加载完后执行的代码
} //页面加载状态改动时执行的方法
document.onreadystatechange=functionPageload;
Default.aspx.cs using System;
using System.Data;
using System.Configuration;
using System.web;
using System.IO;
using System.Text;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Globalization;public partial class _Default : System.Web.UI.Page,ICallbackEventHandler
...{
protected void Page_Load(object sender, EventArgs e)
...{
this.Submit.Attributes.Add("onclick", "QueryServer(txtOperator,TxtStartTime,TxtEndTime,1,"true");return false;");
this.DownListIndex.Attributes.Add("onchange", "QueryServer(txtOperator,TxtStartTime,TxtEndTime,this.value,"false");return false;");
} 回调分页#region 回调分页
private string serverReturn; public string GetCallbackResult()
...{ string[] parts = serverReturn.Split(|);
//根据传递的方法名进行调用，并传递相应的参数，目前只支持一个参数
return (string)GetType().GetMethod(parts[0]).Invoke(this, new object[] ...{ parts[1] });
} public void RaiseCallbackEvent(string eventArgument)
...{
serverReturn = eventArgument;
} /**////
/// 根据从客户端传来的值，对GridView的内容进行更新，并将更新后的GridView的html返回
///
///
/// public string ServerMethodQuery(string arg)
...{
Logs.DataSourceID = "DataSourceLog"; string[] arrayArg = arg.Split($);
this.txtOperator.Text = arrayArg[0];
this.TxtStartTime.Text= arrayArg[1];
this.TxtEndTime.Text = arrayArg[2]; intialPageSelect();
this.DownListIndex.SelectedValue = arrayArg[3];
Logs.DataBind(); //传入客户端字符串,并用"$"分割
StringBuilder strHtml = new StringBuilder();
strHtml.Append(RenderControl(Logs));
strHtml.Append("$");
strHtml.Append(DataLogic.recordSum.ToString());
strHtml.Append("$");
strHtml.Append(Convert.ToString(DataLogic.recordSum / DataAccess.RowsPerPage + 1));
strHtml.Append("$");
strHtml.Append(arrayArg[3]);
if (arrayArg[4] == "true")
...{
strHtml.Append("$"); intialPageSelect();
strHtml.Append(RenderControl(DownListIndex));
} return strHtml.ToString();
} private string RenderControl(Control control)
...{
StringWriter writer1 = new StringWriter(CultureInfo.InvariantCulture);
HtmlTextWriter writer2 = new HtmlTextWriter(writer1); control.RenderControl(writer2);
writer2.Flush();
writer2.Close(); return writer1.ToString();
} /**////
/// 初始化页下拉单
///
private void intialPageSelect()
...{
DownListIndex.Items.Clear();
for (int i = 0; i < (DataLogic.recordSum / DataAccess.RowsPerPage + 1); i++)
...{
this.DownListIndex.Items.Add(Convert.ToString(i + 1));
} }
#endregion
}
如有错误，欢迎指正!
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