Cấu trúc điểm xác định giá trị x và y của góc trên của hình thức của bạn. Nhập đoạn mã sau trong mẫu lớp lớp công cộng: Cấu trúc sử dụng cấp phát bộ nhớ ngăn xếp, vì họ là khép kín và biết chính xác làm thế nào | ACCESSING DATA WITH C AND 12 You can shorthand the five lines that are required to prepare and set a parameter into a single line of code. In terms of code execution time most likely both of these implementations would precompile down to the same Intermediate Language IL . Which implementation to choose is a matter of style. The more verbose style is typically chosen because it is easier to troubleshoot. The line of code for adding a parameter percentage SqlDbT 15 .Value 50 can replace the following lines in the code used in the screenshots in this section SqlParameter prmPercentage new SqlParameter percentage2 50 prmPercentage Add a SqlDataReader variable and use the ExecuteReader to run the stored procedure. Output the contents of the SqlDataReader variable using a while loop. E Close the database connection. Set a debug stop. Click F5 to save build L-B A message appears and run the console showing the results of application. running the stored procedure. 243 C X READ XML FROM A FILE XML is a great lightweight storage of data for your applications. If you are using Microsoft SQL 2000 you can retrieve queries in the form of XML. You will sometimes need to pull XML data from files. Typically you use the XMLTextReader if you need to access the XML as raw data. After you load the XMLTextReader you will iterate through XML data by using the Read method sequentially retrieving the next record from the document. The Read method returns To read XML files you can use an implementation of the XMLReader class. The XMLReader class is an abstract base class that provides noncached forward-only read-only access. Because it is an abstract class you need to use one of the current implementations in the namespace which are XMLTextReader XMLValidatingReader and .
