CourseList Stored Procedure in VS .NET

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CourseList Stored Procedure
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The CourseList stored procedure is called from the Courses Active Server Page and returns all the courses that a student is enrolled in as options for a Select control CREATE PROCEDURE CourseList @StudentID integer AS Declare @AllOfIt varchar(8000)@CourseID varchar(10)@CourseName varchar(50) Declare CurCourses Cursor For Select CoursesCourseID- CoursesCourseName from Courses Inner Join StudentCourses On CoursesCourseID = StudentCoursesCourseID Where StudentCoursesStudentID = @StudentID Order By CourseName Open CurCourses Fetch CurCourses Into @CourseID- @CourseName Select @AllOfIt = '' While @@Fetch_Status = 0 BEGIN Select @AllOfIt = @AllOfIt + '<OPTION VALUE="' + @CourseID + '">' + @CourseName + '</OPTION>' Fetch CurCourses Into @CourseID- @CourseName END Close CurCourses Deallocate CurCourses Select @AllOfIt as TheList GO The procedure expects one parameter- the ID of the student whose course list is to be returned: @StudentID integer Within the procedure- you need a variable that will store the option list as it is being concatenated: @AllOfIt varchar(8000)Also- variables will be needed to store the ID: @CourseID varchar(10)and names of the courses: @CourseName varchar(50) You need a Cursor object to retrieve the courses from the Courses table:
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Declare CurCourses Cursor You set that to return the names and IDs for the courses that the current student is enrolled in Note that you have to join the Courses table with the StudentCourses table so that you can retrieve just the courses that this student is enrolled in: For Select CoursesCourseID- CoursesCourseName from Courses Inner Join StudentCourses On CoursesCourseID = StudentCoursesCourseID Where StudentCoursesStudentID = @StudentID Order By CourseName You then open that cursor: Open CurCourses retrieve the first record into your local variables: Fetch CurCourses Into @CourseID- @CourseName and initialize your return variable: Select @AllOfIt = '' You then enter a loop that allows you to iterate through all the course records: While @@Fetch_Status = 0 Each record needs to be returned as an Option for a Select control The tag is set up so that the student sees the name of the course- but the ID of the course is submitted with the form that the Option tags appears on: Select @AllOfIt = @AllOfIt + '<OPTION VALUE="' + @CourseID + '">' + @CourseName + '</OPTION>' You then retrieve the next record and loop to process it: Fetch CurCourses Into @CourseID- @CourseName After the loop- you release the resources used by the cursor: Close CurCourses Deallocate CurCourses and return the Option tags: Select @AllOfIt as TheList
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TopicList Stored Procedure
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The TopicList stored procedure returns a list of all the topics within a course as Options for an HTML Select element Also returned is the name of the course CREATE PROCEDURE TopicList @CourseID integer AS Declare @AllOfIt varchar(8000)@TopicID varchar(10)@TopicName varchar(50)@CourseName varchar(50) Select @CourseName = CourseName From Courses Where CourseID = @CourseID Declare CurTopics Cursor For Select TopicID- TopicName from Topics Where CourseID = @CourseID Order By SequenceNumber
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Open CurTopics Fetch CurTopics Into @TopicID- @TopicName Select @AllOfIt = '' While @@Fetch_Status = 0 BEGIN Select @AllOfIt = @AllOfIt + '<OPTION VALUE="' + @TopicID + '">' + @TopicName + '</OPTION>' Fetch CurTopics Into @TopicID- @TopicName END Close CurTopics Deallocate CurTopics Select @AllOfIt as TheList- @CourseName as CourseName GO The procedure expects one parameter- the ID of the course from which the topics are to be retrieved: @CourseID integer Within the procedure you will need a variable to store the topic list that is returned: @AllOfIt varchar(8000)as well as the ID and name of each topic as they are retrieved from the Topics table: @TopicID varchar(10)@TopicName varchar(50)This variable will be used to return the name of the course corresponding to the ID passed in: @CourseName varchar(50) You then retrieve that course name and place it in your local variable: Select @CourseName = CourseName From Courses Where CourseID = @CourseID Within the procedure you need a Cursor object to retrieve all the topics: Declare CurTopics Cursor You then set the cursor up so that it just retrieves the topics matching the course ID passed in: For Select TopicID- TopicName from Topics Where CourseID = @CourseID Order By SequenceNumber The cursor is then opened: Open CurTopics the first record is retrieved: Fetch CurTopics Into @TopicID- @TopicName and your variable that will store the Option list is initialized: Select @AllOfIt = '' You then enter a loop so that each record can be processed: While @@Fetch_Status = 0 Each record is concatenated to your local variable as an Option for an HTML Select control: Select @AllOfIt = @AllOfIt + '<OPTION VALUE="' + @TopicID + '">' + @TopicName + '</OPTION>'
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You then retrieve the next record and loop: Fetch CurTopics Into @TopicID- @TopicName End You then release your Cursor object: Close CurTopics Deallocate CurTopics and return both the Option list and the name of the course to the calling application: Select @AllOfIt as TheList- @CourseName as CourseName
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