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ASP.NET的简单数据绑定

2006-10-08 19:59 323 查看
ASP.NET也可以将代码前置，不借助VS.NET的代码提示功能，也许能体会到更多的细节吧。简单数据绑定的关键一点就是利用<%# ... %>来调用函数，下图是要实现的功能:



代码如下:




<%...@ Page Language="C#" ContentType="text/html" ResponseEncoding="gb2312" Debug="true"%>




<%...@ Import Namespace="System.Data" %>




<%...@ Import Namespace="System.Data.SqlClient" %>




<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">


<html>


<head>


<meta http-equiv="Content-Type" content="text/html; charset=gb2312">


<title>简单数据绑定</title>




<style type="text/css">...




h1,div {...}{text-align:center; font-family:宋体; font-size:x-large; color:#CC0000}




table {...}{font-size:14px; color:black}




.stdTextBox {...}{text-align:center; background-color:#CCCCCC; color:#990000}




</style>


</head>


<body bgcolor="ivory">




<form runat="server">


<h1>当前路径:<asp:Label runat="server" ID="lblPath"/></h1>


<div>


<table align="center">


<tr>


<th>编号</th><th>姓名</th><th>城市</th></tr>


<td><asp:TextBox ID="txtID" CssClass="stdTextBox" runat="server" Text='<%#getData("CustomerID") %>'/></td>


<td><asp:TextBox ID="txtName" CssClass="stdTextBox" runat="server" Text='<%#getData("CompanyName") %>'/></td>


<td><asp:TextBox ID="txtTeam" CssClass="stdTextBox" runat="server" Text='<%#getData("City") %>'/></td>


</table>


<asp:LinkButton ID="btnPrev" Font-Size="17px" runat="server" Text="<<" onClick="movePrev"/>


<asp:LinkButton ID="btnNext" Font-Size="17px" runat="server" Text=">>" onClick="moveNext"/>


</div>


</form>






<script language="c#" runat="server">...


public void Page_Load(Object sender,EventArgs e)




...{


this.lblPath.Text = Request.Url.ToString();


if(!IsPostBack)




...{


string strConn = "server=.;database=Northwind;uid=sa;pwd=millfox";


DataSet ds = new DataSet();


string strSelect = "SELECT CustomerID,CompanyName,City FROM Customers";


SqlDataAdapter cmd = new SqlDataAdapter(strSelect,strConn);


cmd.Fill(ds,"tempTable");


this.txtID.Text = ds.Tables["tempTable"].Rows[0]["CustomerID"].ToString();


this.txtName.Text = ds.Tables["tempTable"].Rows[0]["CompanyName"].ToString();


this.txtTeam.Text = ds.Tables["tempTable"].Rows[0]["City"].ToString();




Session["currentRecord"] = 0;


Session["recordCount"] = ds.Tables["tempTable"].Rows.Count-1;


Session["myDs"] = ds;


ReFresh();


}




}




public void ReFresh()




...{


this.txtID.DataBind();


this.txtName.DataBind();


this.txtTeam.DataBind();


}




public void moveNext(Object sender,EventArgs e)




...{


int i = (int)Session["currentRecord"];


int total = (int)Session["recordCount"];


if(i<total)




...{


Session["currentRecord"] = i+1;


ReFresh();


}


}




public void movePrev(Object sender,EventArgs e)




...{


int i = (int)Session["currentRecord"];


if(i>0)




...{


Session["currentRecord"] = i-1;


ReFresh();


}


}




public string getData(string colName)




...{


DataSet ds = (DataSet)Session["myDs"];


int i = (int)Session["currentRecord"];


string temp = ds.Tables["tempTable"].Rows[i][colName].ToString();


return temp;


}


</script>


</body>


</html>



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