Data insertion problem in C# windows application

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SQL-Server-2005

When i click the Register button it gives error like "Procedure or Function 'sp_InsertStudent' expects parameter '@RollNo', which was not supplied.". I m not finding how to solve it... Plz help.

C#

//code for front end that works against the clicking of Register button

private void btnRegister_Click(object sender, EventArgs e)
{
    string source = ("data source = localhost; database = student; " +
                     "Integrated Security = SSPI");
    SqlConnection conn = new SqlConnection(source);
    conn.Open();
    SqlCommand cmd = new SqlCommand("sp_InsertStudent", conn);
    cmd.CommandType = CommandType.StoredProcedure;
    //cmd.Parameters.Add("@RollNo", SqlDbType.Int, 0, "RollNo");
    cmd.Parameters.Add("@Name", SqlDbType.VarChar, 30, "Name");
    cmd.Parameters.Add("@CourseName", SqlDbType.VarChar, 20, 
                       "CourseName");
    cmd.Parameters.Add("@Fee", SqlDbType.VarChar, 6, 
                       "CourseName");
    cmd.ExecuteNonQuery();
    conn.Close();
}

SQL

-- My stored Procedure for inserting data in the table Student_Registration

Create Procedure sp_InsertStudent
@RollNo int,
@Name Varchar(30),
@CourseName Varchar(20),
@Fee int
As
BEGIN
 SET NOCOUNT ON
INSERT INTO dbo.Student_Registration
(
RollNo,
Name,
CourseName,
Fee
 ) 
     VALUES 
          ( 
            @RollNo,
            @Name,
            @CourseName,
            @Fee
          ) 
END 

GO

[Modified: added code formatting]

Posted 19-Mar-10 9:39am

ajitinbang

Updated 19-Mar-10 12:28pm

William Winner

v5

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GenJerDan · Answer 1 · 2010-03-19T09:51:00

Solution 1

ajitinbang wrote:
cmd.CommandType = CommandType.StoredProcedure;
//cmd.Parameters.Add("@RollNo", SqlDbType.Int, 0, "RollNo");
cmd.Parameters.Add("@Name", SqlDbType.VarChar, 30, "Name");

Looks to me like the line that should supply the RollNo parameter is commented out.

Posted 19-Mar-10 9:51am

GenJerDan

Updated 19-Mar-10 9:52am

v2

Austin Cherry · Answer 2 · 2010-03-19T12:58:00

I think you have a few things wrong.
1. you need values to pass to the SP
2. your type on @fee is wrong (should be int)

Try using the AddWithValue method.

C#

   private void btnRegister_Click(object sender, EventArgs e)
{  
	//Need Variables to add to SP
	int RollNumber=1;
	string Name="Some Name";
	string courseName="Course Name";
	int Fee=25;
	
	
	string source = ("data source = localhost; database = student; " +
	                 "Integrated Security = SSPI");
	SqlConnection conn = new SqlConnection(source);
	conn.Open();
	SqlCommand cmd = new SqlCommand("sp_InsertStudent", conn);
	cmd.CommandType = CommandType.StoredProcedure;
	cmd.Parameters.AddWithValue("@RollNo",RollNumber);
	cmd.Parameters.AddWithValue("@Name",Name);
	cmd.Parameters.AddWithValue("@CourseName",courseName);
	cmd.Parameters.AddWithValue("@Fee",Fee);
	cmd.ExecuteNonQuery();
	conn.Close();
}