步入IT業(yè)已經(jīng)有幾年的時間了,從最早接觸pb6.0到現(xiàn)在.Net技術(shù),計算機(jī)技術(shù)不論是從硬件還是軟件都有巨大的進(jìn)步.而中國程序員總體水平在世界上也是遠(yuǎn)遠(yuǎn)落后，其中缺乏完善的體系、必要的交流和程序員個人英雄主義的思想是主要原因.前不久在工作中遇到一個關(guān)于用DataGrid分類顯示數(shù)據(jù)的問題，顯示的樣式入下圖所示: 希望能為遇到類似問題的朋友提供一個解決方案,并掌握類似問題的解決方法.

問題剖析:

以上為例,每門課程屬于不同的類別,需要將顯示數(shù)據(jù)的第一項類別進(jìn)行匯總顯示.用標(biāo)準(zhǔn)的DataGrid是難于實現(xiàn)上述功能的.顯然需要依靠自身來解決.

思路:

歸根到底,不論何種樣式的表格顯示,表現(xiàn)到前臺都是Html的Table元素,因此如果能夠在讀取數(shù)據(jù)時動態(tài)確定Html樣式,并通過Div將html生成到前臺顯示的話,就可以控制復(fù)雜的顯示.這里面其實包含了從已有顯示的html反推到動態(tài)html生成的過程.

源代碼及注釋:

定義類保存類別名字和數(shù)據(jù)條數(shù)

public class KeyVal
{
private string m_Skey;
private string m_SVal;
public string strKey
{
get
{
return m_Skey;
}
set
{
m_Skey=value;
}
}
public string strVal
{
get
{
return m_SVal;
}
set
{
m_SVal=value;
}
}
public KeyVal()
{}
public KeyVal(string SKey,string SVal)
{
strKey=SKey;
strVal=SVal;
}
}

測試頁代碼和相關(guān)函數(shù)

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.Security.Principal;
using Microsoft.Web.UI.WebControls;
using System.Text;

namespace EisWebSite.WebInternet
{
/// <summary>
/// ClassCourse 的摘要說明。
/// </summary>
public class ClassCourse : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DropDownList SpecialtyID;
protected System.Web.UI.HtmlControls.HtmlGenericControl MainDiv;

//
#region 頁面初始化
private void Page_Load(object sender, System.EventArgs e)
{

if (!Page.IsPostBack)
{
AppGlobal.CBoxFillSpecialtyData(ref this.SpecialtyID,true);
}
}

#endregion

#region Web 窗體設(shè)計器生成的代碼
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 該調(diào)用是 ASP.NET Web 窗體設(shè)計器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 設(shè)計器支持所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內(nèi)容。
/// </summary>
private void InitializeComponent()
{
this.SpecialtyID.SelectedIndexChanged += new System.EventHandler(this.SpecialtyID_SelectedIndexChanged);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private string CreateOutHtml()
{


//取出類型數(shù)目以及名稱
DataSet dSet=new DataSet();

dSet=添加自己的獲取數(shù)據(jù)集的函數(shù)(靈活設(shè)計Sql語句)結(jié)果為類型、數(shù)目

//AppGlobal.AppSysWebService.ClassCourseTeacherMainFilters(Item);


ArrayList mList=new ArrayList();

foreach(DataRow dRow in dSet.Tables[0].Rows)
{
KeyVal mObj=new KeyVal();
mObj.strKey=dRow[0].ToString();
mObj.strVal=dRow[1].ToString();
mList.Add(mObj);
}

StringBuilder OutHtml=new StringBuilder();
dSet=添加自己的數(shù)據(jù)集函數(shù).注意數(shù)據(jù)的排序方式與上同

//AppGlobal.AppSysWebService.ClassCourseTeacherFilters(Item);
//添加固定表頭
OutHtml.Append("<table cellspacing='0' cellpadding='0' align='center' rules='all' bordercolor='black' border='1'"
+"id='GRid'"+
" style='word-break:break-all; BORDER-RIGHT:black 1px solid; BORDER-TOP:black 1px solid; BORDER-LEFT:black 1px solid; WIDTH:100%; BORDER-BOTTOM:black 1px solid; BORDER-COLLAPSE:collapse'>"
);
OutHtml.Append("<table cellspacing='0' cellpadding='0' align='center' rules='all' bordercolor='black' border='1'"
+"id='AGRid'"+
" style='word-break:break-all;BORDER-RIGHT:black 1px solid; BORDER-TOP:black 1px solid; BORDER-LEFT:black 1px solid; WIDTH:100%; BORDER-BOTTOM:black 1px solid; BORDER-COLLAPSE:collapse'>");
OutHtml.Append("<tr align='center'>"+
"<td width='87' style='WIDTH: 87px; HEIGHT: 34px'>類別</td>"+
"<td style='WIDTH: 253px; HEIGHT: 34px'>課程編號</td>"+
"<td style='WIDTH: 280px; HEIGHT: 34px'>課程名稱</td>"+
"<td style='WIDTH: 86px; HEIGHT: 34px'>學(xué)分</td>"+
"<td style='WIDTH: 140px; HEIGHT: 34px' >"+
"<table width='100%' height='100%' cellpadding='0' cellspacing='0'>"+
"<tr>"+
"<td align='center'width='33%' ></td>"+
"<td align='center'width='33%'>學(xué)期</td>"+

"<td align='center'width='33%' ></td>"+
"</tr>"+
"<tr>"+
"<td align='center' width='33%'>I</td>"+
"<td align='center' width='33%'>II</td>"+
"<td align='center' width='33%'>III</td>"+
"</tr>"+
""+
"</td>"+
"<td style='WIDTH: 86px; HEIGHT: 34px'>教師名稱</td>"+
"</tr>");
OutHtml.Append("<table cellspacing='0' cellpadding='0' align='center' rules='all' bordercolor='black' border='1'"
+"id='bGRid'"+
" style='word-break:break-all;BORDER-RIGHT:black 1px solid; BORDER-TOP:black 1px solid; BORDER-LEFT:black 1px solid; WIDTH:775px; BORDER-BOTTOM:black 1px solid; BORDER-COLLAPSE:collapse'>");

string SrcType="";
string NewType="";
foreach(DataRow dRow in dSet.Tables[0].Rows)
{
OutHtml.Append("<tr align='center' height='24px' style='word-break:break-all;'> ");

NewType=dRow["KeyValue"].ToString();

if (SrcType!=NewType)
OutHtml.Append("<td width='80' style='WIDTH: 80px; HEIGHT: 34px' rowspan="+SeachObj(dRow["KeyValue"].ToString(),mList).strVal+">"+SeachObj(dRow["KeyValue"].ToString(),mList).strKey+"</td>");
SrcType=NewType;

OutHtml.Append("<td width=231px >"+dRow["courseID"].ToString()+"</td>");
OutHtml.Append("<td width=255px>"+dRow["courseName"].ToString()+"</td>");
OutHtml.Append("<td width=80px>"+dRow["credit"].ToString()+"</td>");
// OutHtml.Append("<td width=100px>");
// OutHtml.Append("<table width='110' height='100%' cellpadding='0' cellspacing='0' bordercolor='black' border='1'>"+
// "<tr>");
switch (Convert.ToInt16(dRow["coursetime"].ToString(),10))
{

case 1:
OutHtml.Append("<td width=43px>√"+"</td>");
OutHtml.Append("<td width=43px></td>");
OutHtml.Append("<td width=43px></td>");
break;
case 2:
OutHtml.Append("<td width=43px></td>");
OutHtml.Append("<td width=43px>√"+"</td>");
OutHtml.Append("<td width=43px></td>");
break;
case 3:
OutHtml.Append("<td width=43px></td>");
OutHtml.Append("<td width=43px></td>");
OutHtml.Append("<td width=3px>√"+"</td>");
break;
default:
OutHtml.Append("<td width=43px></td>");
OutHtml.Append("<td width=43px></td>");
OutHtml.Append("<td width=43px></td>");
break;
}
// OutHtml.Append("</tr>");
// OutHtml.Append("</td>");
OutHtml.Append("<td width=79px style='word-break:break-all;'>"+dRow["TName"].ToString()+"</td>");
OutHtml.Append("</tr>");
}
//添加固定表尾部
OutHtml.Append("");
OutHtml.Append("");
//
// DGRid.DataSource=dSet;
// DGRid.DataBind();
return OutHtml.ToString();
}
private KeyVal SeachObj(string strKey, ArrayList mList)
{
for (int i=0;i<=mList.Count-1;i++)
{
if (((KeyVal)mList[i]).strKey==strKey)
return (KeyVal)mList[i];
}
return null;
}



}

}