为什么连接数据库失败?
我照参考书运行下面实例,为什么连接数据库失败?
<% @Import Namespace="System.Data.SqlClient" %>
<HTML>
<HEAD>
<title>连接SQL Server数据库示例</title>
<script language=C# runat=server>
void Page_Load(object sender, System.EventArgs e)
{
// 连接字符串
string ConnectionString = "Server=(local);User id=sa;pwd=;database=Northwind";
// 创建SqlConnection对象
SqlConnection connection = new SqlConnection(ConnectionString);
try
{
// 打开数据库连接
connection.Open();
myLabel.Text = "连接数据库成功";
}
catch
{
myLabel.Text = "连接数据库失败";
}
finally
{
// 关闭数据库连接
connection.Close();
}
}
</script>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<h3>连接SQL Server数据库示例</h3>
连接信息:<asp:Label id="myLabel" runat="server"></asp:Label>
</form>
</body>
</HTML>