parameter-stored-proc.aspx

来自「东软内部材料（四）asp等相关的教学案例　」· ASPX 代码 · 共 100 行

ASPX

100 行

<%@Page Language="C#"%>

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

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

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head>
<title>Using Explicit Parameters with a Stored Procedure</title>
<!-- #include file="..\global\style.inc" -->
</head>
<body bgcolor="#ffffff">
<span class="heading">Using Explicit Parameters with a Stored Procedure</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>Command Text: <b><span id="outCommandText" runat="server"></span></b></div>
<div>Input Parameter: <b><span id="outInParams" runat="server"></span></b></div>
<div>Output Parameters: <b><span id="outOutParams" runat="server"></span></b></div>
<div id="outError" runat="server">&nbsp;</div>

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

	void Page_Load(Object sender, EventArgs e)
	{

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

		// specify the name of the stored procedure to use as the CommandText
		string strCommandText = "FindFromISBN";
		outCommandText.InnerText = strCommandText; // and display it

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

		// create a new Command object and set the CommandType
		OleDbCommand objCommand = new OleDbCommand(strCommandText, objConnect);
		objCommand.CommandType = CommandType.StoredProcedure;

		// create a variable to hold a Parameter object
		OleDbParameter objParam;

		// create a new Parameter object named 'ISBN' with the correct data
		// type to match a SQL database 'varchar' field of 12 characters
		objParam = objCommand.Parameters.Add("ISBN", OleDbType.VarChar, 12);

		// specify that it// s an Input parameter and set the value
		objParam.Direction = ParameterDirection.Input;
		objParam.Value = "1861002882";

		// create a new Parameter object named 'Title' with the correct data
		// type to match a SQL database 'varchar' field of 50 characters
		// and specify that it's an output parameter (so no value required)
		objParam = objCommand.Parameters.Add("Title", OleDbType.VarChar, 50);
		objParam.Direction = ParameterDirection.Output;

		// create another output Parameter object named 'Date' with the correct
		// data type to match a SQL database 'datetime' field
		objParam = objCommand.Parameters.Add("Date", OleDbType.DBDate);
		objParam.Direction = ParameterDirection.Output;

		// display the value of the input parameter
		outInParams.InnerText = "ISBN='" + objCommand.Parameters["ISBN"].Value + "'";

		try
		{
			// open the connection and execute the command
			objConnect.Open();
			objCommand.ExecuteNonQuery();
			objConnect.Close();    // then close the connection
		}
		catch (Exception objError)
		{
			// display error details
			outError.InnerHtml = "<b>* Error while accessing data</b>.<br />"
						+ objError.Message + "<br />" + objError.Source;
			return;  //  and stop execution
		}

		// collect the values of the output parameters - note the use of
		// the ToString method as they will contain DBNull if there was no
		// match for the ISBN and this will cause an error if displayed
		string strTitle = objCommand.Parameters["Title"].Value.ToString();
		string strDate = objCommand.Parameters["Date"].Value.ToString();
		outOutParams.InnerHtml = "Title='" + strTitle + "' &nbsp; Date=" + strDate;

	}
</script>

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

parameter-stored-proc.aspx - 源码说明

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