一个Ajax.NET的查询实例

因為項目中只能用.net 1.1,所以atlas是用不了了，只能玩玩AjaxProfession.net, 下面是一個查詢的案例。 在頁面上放置一個DataGrid1,各種查詢結果均放入其中，在client端的JS中將SQL語句傳給server端的方法，執行一個查詢，並可以控制雙擊行是否展開一個新的查詢。可將DataGrid1的內容導出到excel中、模擬gmail的Ajax的loading運用

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.IO;
namespace eol
{
/**//// <summary>
/// index 的摘要描述。
/// </summary>
public class index : System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox TextBox1;
protected WebControlLibrary.InputCalendar startTime;
protected WebControlLibrary.InputCalendar endTime;
protected WebControlLibrary.InputCalendar pStartTime;
protected WebControlLibrary.InputCalendar pEndTime;
protected System.Data.SqlClient.SqlConnection Conn=new SqlConnection();
protected System.Web.UI.WebControls.TextBox eformsn;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.DataGrid DataGrid1=new DataGrid();
protected System.Web.UI.WebControls.Button Button2;
protected System.Web.UI.HtmlControls.HtmlInputText applicant;
public string toExcel;

private void Page_Load(object sender, System.EventArgs e)
{
AjaxPro.Utility.RegisterTypeForAjax(typeof(eol.index));
}

public DataSet DB(string dataName, string sqlCmd)
{
string connStr=”server=172.16.0.120;uid=msikdb;pwd=dbmsik;database=”+dataName;
Conn.ConnectionString=connStr;
try
{
Conn.Open();
}
catch(Exception ex)
{
Conn.Close();
Response.Write(ex.Message);
}
SqlCommand cmd=new SqlCommand(sqlCmd, Conn);
SqlDataAdapter da=new SqlDataAdapter();
da.SelectCommand=cmd;
DataSet ds = new DataSet();
da.Fill(ds);
Conn.Close();
return ds;
}

Web Form 設計工具產生的程式碼#region Web Form 設計工具產生的程式碼
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 此為 ASP.NET Web Form 設計工具所需的呼叫。
//
InitializeComponent();
base.OnInit(e);
}

/**//// <summary>
/// 此為設計工具支援所必須的方法 – 請勿使用程式碼編輯器修改
/// 這個方法的內容。
/// </summary>
private void InitializeComponent()
{
this.Conn = new System.Data.SqlClient.SqlConnection();
this.Button2.Click += new System.EventHandler(this.Button2_Click);
this.DataGrid1.ItemCreated += new System.Web.UI.WebControls.DataGridItemEventHandler(this.getPageIndexStyle);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private void getPageIndexStyle(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{

if(e.Item.ItemType == ListItemType.Pager)
{
e.Item.Cells[0].Text=”Total Row:”+this.DataGrid1.Items.Count.ToString();
}
}

[AjaxPro.AjaxMethod]
public string AjaxData(string sSql, bool clientEvent)
{
if (clientEvent)
{
DataGrid1.ItemDataBound+=new DataGridItemEventHandler(DataGrid1_ItemDataBound);
}
// DataGrid1.AllowPaging=true;
// DataGrid1.PagerStyle.Position=PagerPosition.Top;
// DataGrid1.PagerStyle.Mode=PagerMode.NumericPages;
// DataGrid1.ItemCreated+=new DataGridItemEventHandler(getPageIndexStyle);
DataGrid1.DataSource=DB(“query”,sSql);
DataGrid1.HeaderStyle.BackColor=System.Drawing.Color.Blue;
DataGrid1.Width=Unit.Percentage(100);
DataGrid1.HeaderStyle.ForeColor=System.Drawing.Color.White;
DataGrid1.DataBind();


System.Text.StringBuilder sb=new System.Text.StringBuilder();
System.IO.StringWriter sw=new System.IO.StringWriter(sb);
System.Web.UI.HtmlTextWriter htw=new HtmlTextWriter(sw);
this.DataGrid1.RenderControl(htw);
string s=sb.ToString().Replace(” 上午 12:00:00″, “”);
this.toExcel=s;
Session["txtExcel"]=s;
return s;
}

public void setToExcel()
{
//下面這行很重要，attachment 參數表示作為附件下載，您可以改成online在線打開
//filename=FileFlow.xls 指定輸出文件的名稱，注意其擴展名和指定文件類型相符，可以為：.doc 　　 .xls 　　 .txt 　.htm　　
Response.AppendHeader(“Content-Disposition”,”attachment;filename=EOL_”+eformsn.Text+”.xls”);
Response.ContentEncoding=System.Text.Encoding.GetEncoding(“big5″);　
//Response.ContentType指定文件類型 可以為application/ms-excel,application/ms-word ,application/ms-txt,application/ms-html或其他瀏覽器可直接支持文檔　
Response.ContentType = “application/ms-excel”;

Response.Write(this.toExcel);
Response.Write(Session["txtExcel"]);
Session.Abandon();
Response.End();
}

private void Button2_Click(object sender, System.EventArgs e)
{
setToExcel();
}

private void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e)
{
ListItemType itemtype=(ListItemType)e.Item.ItemType;
if (itemtype!=ListItemType.Header && itemtype!=ListItemType.Footer && itemtype!=ListItemType.Separator)
{
e.Item.Attributes.Add(“ondblclick”, “showDetail(“+e.Item.Cells[1].Text+”);”);
e.Item.Attributes.Add(“onmouseover”,”this.className=’mouseOn’”);
e.Item.Attributes.Add(“onmouseout”, “this.className=””);
}
}

}
}
Client端的js:
<script language=”javascript”>
var obj=document.all;
var frm=document.forms[0];
var box=document.getElementById(“detail”);
var list=document.getElementById(“datagrid”);

if(typeof ASP == “undefined”) ASP={};
ASP.LoadingDemo_class = function() {};
Object.extend(ASP.LoadingDemo_class.prototype, Object.extend(new AjaxPro.AjaxClass(), {
LongOperation: function() {
return this.invoke(“LongOperation”, {}, this.LongOperation.getArguments().slice(0));
},
url: ‘/ajaxpro/ASP.LoadingDemo,App_Web_t_mu_tej.ashx’
}));
ASP.LoadingDemo = new ASP.LoadingDemo_class();

var c = 0;
AjaxPro.onLoading = function(b) {
c++;
window.status = c;
var l = document.getElementById(“loadinfo”);
l.style.visibility = b ? “visible” : “hidden”;
l.style.right=0;
l.style.pixelTop=document.body.scrollTop;
}

function showDetail(n) {
c = 0;
ASP.LoadingDemo.LongOperation(new Function(‘getEolByeFormsn(‘+n+’)\'));
}

function getDataGrid(sql,Event)
{
if(list.style.display==’none’)
{
list.style.display=”;
}
box.style.display==” ? box.style.display=’none’:void(0);
var p=eol.index.AjaxData(sql, Event).value;
list.innerHTML=p;
}

function getEolByeFormsn(n)
{
if (box.style.display==”none”)
{
box.style.display=”";
box.innerHTML=”<div id=’toolbar’><div id=’btnGoback’ onclick=’goBack()’><img src=http://172.16.0.134/webflow/images/cch.gif>GO BACK</div></div>”
}
list.style.display=”none”;
var p=eol.index.AjaxData(“select * from msi_eol_list_line t where eformsn=”+n, false).value;
box.innerHTML+=p;
}

window.onload=function ()
{
box.style.display=”none”;
list.style.display=”none”;
document.getElementById(“btnQuery”).onclick=whenQuery;
document.getElementById(“btnToexcel”).style.visibility=”hidden”;
document.getElementById(“btnHelp”).onclick=getHelp;
}
function goBack()
{
box.style.display=’none’;
list.style.display=”;
}
function whenQuery()
{
var type=document.getElementById(“types”);
var err=time=param=”;
var sql=”select distinct (select Count(eformsn) from query.dbo.msi_eol_list_line where eformsn=w.eformsn) Line, w.* from (select eFormsn, Cast(Apply_Date as datetime) as ApplyDate, Applicant, LOB, Cast(p_date as datetime) as PendingDate, ‘process’ as Status from webflow.dbo.tb_326_1 union select eformsn, Cast(apply_date as datetime), applicant, lob, Cast(p_date as datetime), ‘over’ as Status from webflowdata.dbo.tb_326_1 where flowendstatus=’E\') w inner join query.dbo.msi_eol_list_line as e on w.eformsn=e.eformsn where (w.eformsn=e.eformsn) “;
switch (type.value)
{
case “eformsn”:
if (frm.eformsn.value!=”)
{
param=”and e.eformsn=’”+frm.eformsn.value+”‘”;
}else{
err=”請輸入申請單號.!”
}
break;
case “applytime”:
if (frm.startTime.value==” && frm.endTime.value==”)
{
err=”請輸入申請起止時間”;
}
break;
case “applicant”:
if (frm.applicant.value!=”")
{
param+=”and e.applicant=’”+frm.applicant.value+”‘ order by w.ApplyDate”;
}else{
err=’請輸入申請者中文名’;
}
break;
case “lob”:
if (frm.lob.value!=”")
{
param=”and w.lob=’”+frm.lob.value+”‘”;
}else{
err=”請輸入LOB”;
}
break;
case “pendingtime”:
if (frm.pStartTime.value!=”" && frm.pEndTime.value!=”"){
param=” and w.PendingDate between cast(‘”+frm.pStartTime.value+”‘ as datetime) and cast(‘”+frm.pEndTime.value+”‘ as datetime) order by w.PendingDate”;
}else{
err=”請輸入Pending Time”;
}
break;
case “model”:
if (frm.model.value!=”){
frm.startTime.value=frm.endTime.value=”;
sql=”;
param=”select distinct (select count(model) from query.dbo.msi_eol_list_line where model=e.model) Total, eFormsn, Model, Applicant, LOB, Cast(Creation_date as datetime) as ApplyDate, Cast(pending_date as datetime) as PendingDate, (select Status from (select eFormsn, ‘process’ as Status from webflow.dbo.tb_326_1 union select eformsn, ‘over’ as Status from webflowdata.dbo.tb_326_1 where flowendstatus=’E\') as w where w.eformsn=e.eformsn) as Status from query.dbo.msi_eol_list_line as e where e.model=’”+frm.model.value+”‘ group by Model, Applicant, LOB, Creation_date, Pending_Date, eformsn”;
}else{
err=”請輸入Model”;
}
break;
}
if (err==”)
{
if (frm.startTime.value!=” && frm.endTime.value!=”)
{
time=”and ApplyDate between Cast(‘”+frm.startTime.value+”‘ as datetime) and Cast(‘”+frm.endTime.value+”‘ as datetime) “;
}

sql+=time+param;
//document.write(sql);
c = 0;
ASP.LoadingDemo.LongOperation(new Function(‘getDataGrid(“‘+sql+’”,true)’));
}else{
alert(err);
}
}

var oPopup = window.createPopup();
function getHelp()
{
var oPopupBody = oPopup.document.body;
var lefter = screen.width-150;
var topper = document.body.scrollTop;
oPopupBody.innerHTML = helpbox.innerHTML;
oPopup.show(lefter, topper, 280, document.body.offsetHeight, document.body);
document.body.onmouseup = new Function(“oPopup.hide();”);
}
</script>

来源:网络