38c
Download as PPTX, PDF•0 likes•44 views
The document discusses stored procedures in C# and ADO.NET. It defines stored procedures as pre-compiled SQL statements that improve performance by avoiding repeated parsing and optimization. It provides examples of creating stored procedures to insert, update, and delete student records from a database. It also shows how to call stored procedures from C# code using ADO.NET, including how to define parameters and return values.
![• private void button1_Click(object sender, EventArgs e)
• { con.Open(); cmd.Connection = con;
• cmd.CommandText = "getvalues";//sp name
• cmd.CommandType = CommandType.StoredProcedure;//sp type
• p = cmd.Parameters.Add("@a", SqlDbType.Int);//parameter datatype
• p.Direction = ParameterDirection.Input;//parameter direction
• p.Value = Convert.ToInt16(textBox1.Text);//parameter value
• p = cmd.Parameters.Add("@b", SqlDbType.Int);//parameter datatype
• p.Direction = ParameterDirection.Input;//parameter direction
• p.Value = Convert.ToInt16(textBox2.Text);//parameter value
• p = cmd.Parameters.Add("@c", SqlDbType.Int);//parameter datatype
• p.Direction = ParameterDirection.Output;//parameter direction
• cmd.ExecuteNonQuery();
• textBox3.Text = cmd.Parameters["@c"].Value.ToString();
• cmd.ExecuteNonQuery();
• MessageBox.Show("values are added");
• } }](https://image.slidesharecdn.com/38c-170711101256/85/38c-12-320.jpg)
38c
- 1. Hi friends C# Tutorial Part 38: Stored procedure www.siri-kt.blogspot.com
- 2. • Ado.net with stored procedure: • Stored procedure maintains collection of sql statements. Stored Procedures are a set of sql commands which are compiled and are stored inside the database. • Every time you execute a sql command, the command is parsed, optimization is done and then the command is executed. • Parsing and optimization the command each time you run the query is very expensive. • To solve this we have a set of commands collectively called as stored procedure, which are already parsed and optimized and are executed when ever we call them. • comparing with functions and with the stored procedure improves the application.
- 3. • Ado.net with stored procedure: • it is the collection of sql statements; comparing with functions the stored procedure are very faster accessibility. stored procedure can returns collections values. stored is pre-executed block of code. it executes the first request only. • second request onwards all requests communicates with the executed block for getting the o/p. • syntax: • create procedure procedurename(@parameters) As begin • sqlstatements; • end • ex:c=a+b; • 30=10+20 • a=input • b=input • c=output
- 4. • stored procedure supports 3 types of parameters • 1.In(input) • 2.out(output type) • 3.INOUt(input,output type) • stored procedure is maintains 3 parameter values and sends every parameter value in the parameter class. • parameter class: • this class is used to store one parameter from the stored procedures. after storing parameter in the parameter class to set 3 values • to each and every parameter • 1.parameter datatype • 2.parameter direction • 3.parameter value
- 5. • how to create the stored procedure: • insert student stored procedure: • create procedure insertdata(@sno int,@sname varchar(50),@saddress varchar(50)) • as • begin • insert into student(sno,sname,saddress)values(@sno,@sname, @saddress) • end
- 6. • update student stored proceduere: • create procedure updatedata(@sno int,@sname varchar(50),@saddress varchar(50)) • as • begin • update student set sname=@sname,saddress=@saddress where sno=@sno • end • delete student stored procedure: • create procedure deletedata(@sno int) • as • begin • delete from student where sno=@sno • end
- 7. • Example on how to insert, update, delete values in ado.net using • Stored procedures. • 1.take the one form • 2.add 3 labels,3 text boxes and 3 buttons • Connection flow: • connection->con.open()->command->commandtext-> commandtype -> parameter datatype ->parameter direction-> parameter value -> cmd.executenonquery() -> UI
- 8. • using system.data; • SqlConnection con = new SqlConnection("data source=sit-pc;database=suhashini;user id=sa;password=123"); • SqlCommand cmd = new SqlCommand(); SqlParameter p; • private void button1_Click(object sender, EventArgs e) • { con.Open(); cmd.Connection = con; • cmd.CommandText = "insertdata";//sp name • cmd.CommandType = CommandType.StoredProcedure;//sp type • p = cmd.Parameters.Add("@sno", SqlDbType.Int);//parameter datatype • p.Direction = ParameterDirection.Input;//parameter direction • p.Value = Convert.ToInt16(textBox1.Text);//parameter value • p = cmd.Parameters.Add("@sname", SqlDbType.VarChar);//parameter datatype • p.Direction = ParameterDirection.Input;//parameter direction • p.Value =textBox2.Text;//parameter value • p = cmd.Parameters.Add("@saddress", SqlDbType.VarChar);//parameter datatype • p.Direction = ParameterDirection.Input;//parameter direction • p.Value = textBox3.Text;//parameter value
- 9. • private void button2_Click(object sender, EventArgs e) • { con.Open(); • cmd.Connection = con; cmd.CommandText = "updatedata";//sp name • cmd.CommandType = CommandType.StoredProcedure;//sp type • p = cmd.Parameters.Add("@sno", SqlDbType.Int);//parameter datatype • p.Direction = ParameterDirection.Input;//parameter direction • p.Value = Convert.ToInt16(textBox1.Text);//parameter value • p = cmd.Parameters.Add("@sname", SqlDbType.VarChar);//parameter datatype • p.Direction = ParameterDirection.Input;//parameter direction • p.Value = textBox2.Text;//parameter value • p = cmd.Parameters.Add("@saddress", SqlDbType.VarChar);//parameter datatype • p.Direction = ParameterDirection.Input;//parameter direction • p.Value = textBox3.Text;//parameter value • cmd.ExecuteNonQuery(); MessageBox.Show("values are updated"); • }
- 10. • private void button3_Click(object sender, EventArgs e) • { con.Open(); • cmd.Connection = con; • cmd.CommandText = "deletedata";//sp name • cmd.CommandType = CommandType.StoredProcedure;//sp type • p = cmd.Parameters.Add("@sno", SqlDbType.Int);//parameter datatype • p.Direction = ParameterDirection.Input;//parameter direction • p.Value = Convert.ToInt16(textBox1.Text);//parameter value • cmd.ExecuteNonQuery(); • MessageBox.Show("values are deleted");
- 11. • Example 2: • how to add 2 numbers using stored procedure. • 1.take the form • 2.add 3 labels,3text boxes and only one button • add 2 two numbers stored procedures: • create procedure getvalues(@a int,@b int,@c int out) • as • begin • select @c=@a+@b; • end; • source code: • SqlConnection con = new SqlConnection("data source=sit- pc;database=suhashini;user id=sa;password=123"); • SqlCommand cmd = new SqlCommand(); • SqlParameter p;
- 12. • private void button1_Click(object sender, EventArgs e) • { con.Open(); cmd.Connection = con; • cmd.CommandText = "getvalues";//sp name • cmd.CommandType = CommandType.StoredProcedure;//sp type • p = cmd.Parameters.Add("@a", SqlDbType.Int);//parameter datatype • p.Direction = ParameterDirection.Input;//parameter direction • p.Value = Convert.ToInt16(textBox1.Text);//parameter value • p = cmd.Parameters.Add("@b", SqlDbType.Int);//parameter datatype • p.Direction = ParameterDirection.Input;//parameter direction • p.Value = Convert.ToInt16(textBox2.Text);//parameter value • p = cmd.Parameters.Add("@c", SqlDbType.Int);//parameter datatype • p.Direction = ParameterDirection.Output;//parameter direction • cmd.ExecuteNonQuery(); • textBox3.Text = cmd.Parameters["@c"].Value.ToString(); • cmd.ExecuteNonQuery(); • MessageBox.Show("values are added"); • } }
- 13. For more visit our website www.siri-kt.blogspot.com Thanks for Watching More Angular JS TutorialsMore C sharp (c#) tutorials