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Attendance Saving Code Demo

For all students who wanted a Demo of Saving Attendance in the table.



protected void Button1_Click(object sender, EventArgs e)
    {
        //ON THE CLICK OF SAVE ATTENDANCE BUTTON
        DateTime vDt = DateTime.Now;
        int vRegNo;
        String vCourseCode;
        String vSection;
        String vAttendanceStatus = "";

        for (int x = 0; x < GridView1.Rows.Count; x++)
        {
            vRegNo = Convert.ToInt16(GridView1.Rows[x].Cells[0].Text);
            vCourseCode = GridView1.Rows[x].Cells[1].Text;
            vSection = GridView1.Rows[x].Cells[2].Text;
            DropDownList temp = (DropDownList)GridView1.Rows[x].Cells[3].FindControl("mydropdown");
            if (temp.SelectedIndex == 0)
            {
                vAttendanceStatus = "P";
            }
            else if (temp.SelectedIndex == 1)
            {
                vAttendanceStatus = "A";
            }
            //Call the method;
            InsertAttendanceRecord(vDt, vRegNo, vCourseCode, vSection, vAttendanceStatus);
            Label1.Text = "Attendance Saved";
        }
    }
    private void InsertAttendanceRecord(DateTime dt, int vRegNo, String vCourseCode, String vSection, String vAttendStatus)
    {
        SqlConnection vConn = new SqlConnection("server=localhost; database=lovely; user id=sa; pwd=123");
        vConn.Open();

        String vQuery = "Insert into StudentAttendanceRecord(EntryDate, RegNo, CourseCode, Section, AttendanceStatus) values (@vDate, @vRegno, @vCourseCode, @vSection, @vAttendStatus)";
        SqlCommand vComm = new SqlCommand(vQuery, vConn);
        vComm.Parameters.AddWithValue("@vDate", dt);
        vComm.Parameters.AddWithValue("@vRegno", vRegNo);
        vComm.Parameters.AddWithValue("@vCourseCode", vCourseCode);
        vComm.Parameters.AddWithValue("@vSection", vSection);
        vComm.Parameters.AddWithValue("@vAttendStatus", vAttendStatus);
        vComm.ExecuteNonQuery();
        vConn.Close();

    }
    protected void LinkButton1_Click(object sender, EventArgs e)
    {
        //FOR MARKING ALL PRESENT
        for (int x = 0; x < GridView1.Rows.Count; x++)
        {
           
            DropDownList temp = (DropDownList)GridView1.Rows[x].Cells[3].FindControl("mydropdown");
            temp.SelectedIndex = 0;

        }  
    }
    protected void LinkButton2_Click(object sender, EventArgs e)
    {
        //FOR MARKING ALL ABSENT.
        for (int x = 0; x < GridView1.Rows.Count; x++)
        {

            DropDownList temp = (DropDownList)GridView1.Rows[x].Cells[3].FindControl("mydropdown");
            temp.SelectedIndex = 1;

        }  
    }

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