一、引言:
开发v1的时候,遇到很多困难(因为我是新手),于是就上网找了一些资料。
其中,这篇《数据绑定的总结 》文章(http://www.cnblogs.com/qingtianyzl/articles/351012.html)被我看到了,里面有把数组绑定到DataGrid的方法。将里面的一部分代码复制过来,修改一下,就完成了基本的功能。
二、基本原理
dataGrid是asp.net 1.x中用来显示网格式数据的服务器控件,可能通过绑定的方式,把DataTable(数据表)里的内容放置到dataGrid。
那么DataTable是哪来的呢?最基本的来源,是通过连接数据库,打开表获得。(这也是大多数课本上讲的)那么,如果像我这样,所要展示的不是来自于数据库的内容怎么办?我就想到,能不能把数组绑定的dataGrid上呢?在网上找了一些资料,没有结果,却从上面提到的那篇文章里找到了另外的思路:用程序生成一个空的DataTable,再创建Field(在asp.net里叫做列DataColumn),然后把数据填充进去。
晴天,在代码里的注释说得很详细,所以我这里就不我啰嗦了。
三、附源代码
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<%@ Control Language="C#" ClassName="ListUpload_v2" %>
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<%@ Import Namespace="System.IO" %>
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<%@ Import namespace="System.Data" %>
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<script runat="server">
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/****************************************************************
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**上传文件管理控件
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**文件名:ListUpload_v2.ascx
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**Copyrigth(c) 2008-2010 *************** 柳城别日 xpnew.cnblogs.com
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**文件编号:
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**创建人:柳城别日
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**日期:2008年5月22日
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**修改人:柳城别日
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**日期:2008年5月22日
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* 描述:用来管理上传文件,支持列表、删除
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**/
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//
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/* class ListUpload2
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{
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}
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*
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*
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* */
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// 类内部初始化
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private string _strDir = @"~/Upload/";
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public string strDir//通过这个属性,可以设置控件所要管理的目录
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{
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get
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{
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return _strDir;
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}
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set
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{
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_strDir = value;
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}
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}
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protected void Page_Load(object sender, EventArgs e)
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{
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if (!Page.IsPostBack)
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{
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//--------------------------------
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//下面是从网上找到的代码:
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DataTable dt = new DataTable();
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//dt为声明一个表
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DataRow dr;
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//表示Table中行的数据
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dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
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dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
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dt.Columns.Add(new DataColumn("DateTimeValue", typeof(DateTime)));
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dt.Columns.Add(new DataColumn("BooleanValue", typeof(bool)));
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//Columns为取值该表列的集合,
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//Add.为该表添加到列的集合 DataColumn为列框架
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//后面是列头的标题,后面表示该列的数据类型
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for (int i = 1; i <= 9; i++)
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{
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dr = dt.NewRow();
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//创建与该表具有相同框架新的数据行
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dr[0] = i;
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dr[1] = "Item " + i.ToString();
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dr[2] = DateTime.Now;
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dr[3] = (i % 2 != 0) ? true : false;
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//为数据行添加数值
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dt.Rows.Add(dr);
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//把获得数值的指定的行加到该表的集合
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}
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// dataGrid1.DataSource = new DataView(dt);
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//把该表作为数据源 放到dataGrid1中
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// dataGrid1.DataBind();//数据绑定被我注释了
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//网上的代码结束
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//------------------
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//-------------------我自己的代码开始
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DataTable FileList = new DataTable();
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//FileList为声明一个表
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DataRow FileItem;
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//表示Table中行的数据
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FileList.Columns.Add(new DataColumn("选择", typeof(bool)));
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FileList.Columns.Add(new DataColumn("文件名", typeof(string)));
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FileList.Columns.Add(new DataColumn("大小(字节)", typeof(Int32)));
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FileList.Columns.Add(new DataColumn("上传日期", typeof(DateTime)));
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//Columns为取值该表列的集合,
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//Add.为该表添加到列的集合 DataColumn为列框架
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//前面是列头的标题,后面表示该列的数据类型----这是别人的注释
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//我认为前面不单单是标题那么简单,在v4里后详细地说明
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string dirPath = Server.MapPath(strDir);
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DirectoryInfo Dir = new DirectoryInfo(dirPath);
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FileInfo[] arrFiles = Dir.GetFiles();
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foreach (FileInfo f in arrFiles)
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{
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FileItem = FileList.NewRow();
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//创建与该表具有相同框架新的数据行
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FileItem[0] = false;
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FileItem[1] = f.Name;
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FileItem[2] = f.Length;
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FileItem[3] = f.LastWriteTime;
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//为数据行添加数值
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FileList.Rows.Add(FileItem);
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//把获得数值的指定的行加到该表的集合
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}
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dataGrid2.DataSource = new DataView(FileList);
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//把该表作为数据源 放到dataGrid2中
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dataGrid2.DataBind();
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//绑定
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}
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}
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</script>
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<asp:DataGrid ID="dataGrid2" runat="server" BorderColor="black" BorderWidth="1" CellPadding="3"
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CellSpacing="0" GridLines="Both" HeaderStyle-BackColor="#aaaadd" >
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</asp:DataGrid>
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