Question

Ok so I am new here 🙂 I am relatively new to SQL, and I am trying to insert data into multiple tables. I have both inserts to work however I want it so if one fails neither are committed.
The tables look like this:

Student –
StudentID – int PK,
StudentName – Varchar,
etc …

Class –
ClassID – int PK,
ClassName – varchar,
etc…

StudentClass –
StudentID,
ClassID,

What I am trying to do is create a new Student whom can belong to multiple classes. So I have created the Student class table to break up the many-many relationship. I have a stored procedure to insert a new student and return the newest StudentID and then I use this StudentID, in a new stored procedure, and a table value parameter to insert multiple rows into StudentClass table. These are the stored procedures:

Create A Student:

@FirstName varchar(20) = '', 
@LastName varchar(20) = '',
@PredictedGrade char(1) = '',
@ActionPlan bit = 0,
@StudentActive bit = 1,
@StudentID int out

INSERT INTO Student (FirstName, LastName, PredictedGrade, ActionPlan, StudentActive)
VALUES (@FirstName, @LastName, @PredictedGrade, @ActionPlan, @StudentActive)
SET @StudentID = SCOPE_IDENTITY()

Add Multiple Rows To StudentClass Table:

(@StudentClassCollection As InsertStudentClass READONLY)

INSERT INTO StudentClass(StudentID, ClassID)
SELECT StudentID, ClassID FROM @StudentClassCollection

So both of these work however I don’t know how to make it so if one fails the other will not execute and changes will not be committed? So effectively I need to perform both actions one after the other in the same stored procedure? I think! As I said I am new so if I have done anything wrong please let me know I will correct it 🙂

Answer 1

try like the below

using (SqlConnection  connection= new SqlConnection(connectionstring))
   {
     connection.Open();
     SqlTransaction transaction = connection.BeginTransaction();
     try
     {
        SqlCommand command = new SqlCommand("proc1",connection);
        //execute the above command
        command.CommandText="proc2";
        //execute command again for proc2
        transaction.Commit();                   
     }
     catch
     {
       //Roll back the transaction.
       transaction.Rollback();
     }  
   }