程序总是出现“ConnectionString 属性尚未初始化”怎么回事阿
日期：2014-05-19 浏览次数：20531 次
程序总是出现“ConnectionString 属性尚未初始化”咋回事阿？
前台代码是这样的：（只是放了个DataList控件）
<%@ Page Language= "C# "Debug=true AutoEventWireup= "true " CodeFile= "Default2.aspx.cs " Inherits= "Default2 " %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN " "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<html xmlns= "http://www.w3.org/1999/xhtml " >
<head runat= "server ">
<title> 无标题页 </title>
</head>
<body>
<form id= "form1 " runat= "server ">
<div>
<asp:DataList ID= "DataList2 " runat= "server ">
</asp:DataList> </div>
</form>
</body>
</html>
后台代码如下 ：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
bind();
}
}
private void bind()
{
DB sdb = new DB();
DataList2.DataSource = sdb.dt( "select * from student ");
DataList2.DataKeyField = "no ";
DataList2.DataBind();
Response.Write( "绑定2成功 ");
}
}
其中用到的类文件代码如下:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
/// <summary>
/// DB 的摘要说明
/// </summary>
public class DB
{
public static string strConnection;
private int
前台代码是这样的：（只是放了个DataList控件）
<%@ Page Language= "C# "Debug=true AutoEventWireup= "true " CodeFile= "Default2.aspx.cs " Inherits= "Default2 " %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN " "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<html xmlns= "http://www.w3.org/1999/xhtml " >
<head runat= "server ">
<title> 无标题页 </title>
</head>
<body>
<form id= "form1 " runat= "server ">
<div>
<asp:DataList ID= "DataList2 " runat= "server ">
</asp:DataList> </div>
</form>
</body>
</html>
后台代码如下 ：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
bind();
}
}
private void bind()
{
DB sdb = new DB();
DataList2.DataSource = sdb.dt( "select * from student ");
DataList2.DataKeyField = "no ";
DataList2.DataBind();
Response.Write( "绑定2成功 ");
}
}
其中用到的类文件代码如下:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
/// <summary>
/// DB 的摘要说明
/// </summary>
public class DB
{
public static string strConnection;
private int
免责声明： 本文仅代表作者个人观点，与爱易网无关。其原创性以及文中陈述文字和内容未经本站证实，对本文以及其中全部或者部分内容、文字的真实性、完整性、及时性本站不作任何保证或承诺，请读者仅作参考，并请自行核实相关内容。
