datareader-sql.aspx

来自「东软内部材料（四）asp等相关的教学案例　」· ASPX 代码 · 共 91 行

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91 行
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<%@Page Language="C#"%>

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

<%@ Register TagPrefix="wrox" TagName="connect" Src="..\global\connect-strings.ascx" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head>
<title>The .NET SqlDataReader and SqlConnection Objects</title>
<!-- #include file="..\global\style.inc" -->
</head>
<body bgcolor="#ffffff">
<span class="heading">The .NET SqlDataReader and SqlConnection Objects</span><hr />
<!--------------------------------------------------------------------------->

<%-- insert connection string script --%>
<wrox:connect id="ctlConnectStrings" runat="server"/>

<div>Connection string: <b><span id="outConnect" runat="server"></span></b></div>
<div>SELECT command: <b><span id="outSelect" runat="server"></span></b></div>
<div id="outError" runat="server">&nbsp;</div>
<div id="outResult" runat="server"></div>

<script language="C#" runat="server">

	void Page_Load(Object sender, EventArgs e)
	{
		// declare a string to hold the results as an HTML table
		string strResult = "<table>";

		// get connection string from ..\global\connect-strings.ascx user control
		string strConnect = ctlConnectStrings.SQLConnectionString;
		outConnect.InnerText = strConnect;		// and display it

		// specify the SELECT statement to extract the data
		string strSelect = "SELECT * FROM BookList WHERE ISBN LIKE '1861003%'";
		outSelect.InnerText = strSelect;		// and display it

		try
		{
			// create a new Connection object using the connection string
			SqlConnection objConnect = new SqlConnection(strConnect);

			// open the connection to the database
			objConnect.Open();

			// create a new Command using the connection object and select statement
			SqlCommand objCommand = new SqlCommand(strSelect, objConnect);

			// declare a variable to hold a DataReader object
			SqlDataReader objDataReader;

			// execute the SQL statement against the command to fill the DataReader
			objDataReader = objCommand.ExecuteReader();

			// iterate through the records in the DataReader getting field values
			// the Read method returns False when there are no more records
			while (objDataReader.Read())
			{
				strResult += "<tr><td>" + objDataReader["ISBN"] + "</td><td> &nbsp;"
							+ objDataReader["Title"] + "</td><td> &nbsp;"
							+ objDataReader["PublicationDate"] + "</td></tr>";
			}

			// close the DataReader and Connection
			objDataReader.Close();
			objConnect.Close();
		}
		catch (Exception objError)
		{
			// display error details
			outError.InnerHtml = "<b>* Error while accessing data</b>.<br />"
							+ objError.Message + "<br />" + objError.Source;
			return;		//  and stop execution
		}

		// add closing table tag and display the results
		strResult += "</table>";
		outResult.InnerHtml = strResult;

	}
	
</script>


<!--------------------------------------------------------------------------->
<!-- #include file="..\global\foot.inc" -->
</body>
</html>

datareader-sql.aspx - 源码说明

本页面展示了「东软内部材料（四）asp等相关的教学案例　」中的 datareader-sql.aspx 源码文件，采用 ASPX 编程语言编写，共 91 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

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