什么是参数化？

Question

http://zh.wikipedia.org/wiki/%E5%8F%83%E6%95%B8%E5%8C%96%E6%9F%A5%E8%A9%A2

Answer 1

http://msdn.microsoft.com/zh-cn/library/vstudio/bb738521(v=vs.100).aspx
看下msdn
using (AdventureWorksEntities context =
    new AdventureWorksEntities())
{
    // Create a query that takes two parameters.
    string queryString =
        @"SELECT VALUE Contact FROM AdventureWorksEntities.Contacts 
                AS Contact WHERE Contact.LastName = @ln AND
                Contact.FirstName = @fn";    ObjectQuery<Contact> contactQuery =
        new ObjectQuery<Contact>(queryString, context);    // Add parameters to the collection.
    contactQuery.Parameters.Add(new ObjectParameter("ln", "Adams"));
    contactQuery.Parameters.Add(new ObjectParameter("fn", "Frances"));    // Iterate through the collection of Contact items.
    foreach (Contact result in contactQuery)
        Console.WriteLine("Last Name: {0}; First Name: {1}",
        result.LastName, result.FirstName);
}

Answer 2

http://www.cnblogs.com/asdlx/archive/2010/05/14/1735410.html