private StudentSearchCriteria makeSearchCriteria()
{
StudentSearchCriteria sc = new StudentSearchCriteria();
if (Student.parseStudentID(RollTextBox.Text.Trim(), sc) == false)
{
MessageBox.Show("Invalid Student ID");
return null;
}
//sc.RollLike = this.rollTextBox.Text.Trim();
sc.Name = this.NameTextBox.Text.Trim();
if (sc.Batch != null)
{
if (this.BatchTextBox.Text.Trim() != "" && !this.BatchTextBox.Text.Trim().Equals(sc.Batch))
{
MessageBox.Show("Student ID and Batch do not match.");
return null;
}
}
else
sc.Batch = this.BatchTextBox.Text.Trim();
//////////////////////////////////////////////
return sc;
}
private void GenerateButton_Click(object sender, EventArgs e)
{
if (batchTextBox.Text.Length != 2)
{
MessageBox.Show("Invalid Batch.");
return;
}
else if (startRollTextBox.Text.Length != 2)
{
MessageBox.Show("Invalid Start Roll.");
return;
}
else if (endRollTextBox.Text.Length != 2)
{
MessageBox.Show("Invalid End Roll.");
return;
}
int startRoll = int.Parse(startRollTextBox.Text);
int endRoll = int.Parse(endRollTextBox.Text);
if ( endRoll<startRoll )
{
MessageBox.Show("End Roll Must be Greater than Start Roll");
return;
}
int numOfStudents = endRoll - startRoll + 1;
studentList = new List<Student>(numOfStudents);
for (int i = 0; i < numOfStudents; i++)
{
studentList.Add(new Student());
studentList[i].Batch = batchTextBox.Text;
studentList[i].Roll = startRoll++.ToString("D2");
}
StudentSearchCriteria sc = new StudentSearchCriteria();
sc.Batch = batchTextBox.Text;
List<Student> existingStudentList = new List<Student>();
existingStudentList = Student.GetStudentList(sc);
for (int i = 0; i < numOfStudents; i++)
{
for (int j = 0; j < existingStudentList.Count; j++)
{
if (studentList[i].Roll == existingStudentList[j].Roll)
{
studentList[i].StudentId = existingStudentList[j].StudentId;
studentList[i].Name = existingStudentList[j].Name;
break;
}
}
}
for (int i = 0; i < numOfStudents; i++)
{
}
this.DialogResult = DialogResult.OK;
this.Close();
}
public static Boolean parseStudentID(String StdID, StudentSearchCriteria sc)
{
Boolean retValue = false;
if (StdID.Length == 6)
{
sc.Batch = StdID.Substring(0, 2);
sc.RollExact = StdID.Substring(4, 2);
retValue = true;
}
else if (StdID.Length == 2)
{
sc.RollExact = StdID;
sc.Batch = "";
retValue = true;
}
else if (StdID.Length == 0)
retValue = true;
return retValue;
}
public static List<Student> GetStudentList(StudentSearchCriteria sc)
{
//MySqlConnection connection = new MySqlConnection(global::CCMS.Properties.Settings.Default.ccmsConnectionString);
OleDbConnection connection = new OleDbConnection(global::ResultManagement.Properties.Settings.Default.ConnectionString);
string cmdStr = @"SELECT student.id, student.Roll, student.batch, student.St_name
FROM student WHERE 1 ";
#region search criteria
if (sc.StudentId != null)
{
cmdStr += " AND student.id = " + sc.StudentId.ToString();
}
if (sc.RollLike != null)
{
cmdStr += " AND student.roll LIKE '%" + sc.RollLike + "%'";
}
if (sc.RollExact != null)
{
cmdStr += " AND student.roll = '" + sc.RollExact + "'";
}
if (sc.Name != null)
{
cmdStr += " AND student.St_name LIKE '%" + sc.Name + "%'";
}
if (sc.Batch != null)
{
cmdStr += " AND student.batch = '" + sc.Batch + "'";
}
cmdStr += " ORDER BY batch,roll";
#endregion
//MySqlCommand cmd = new MySqlCommand(cmdStr, connection);
OleDbCommand cmd = new OleDbCommand(cmdStr, connection);
List<Student> sList = new List<Student>();
try
{
connection.Open();
//MySqlDataReader reader = cmd.ExecuteReader();
OleDbDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
Student s = new Student();
#region student
object val;
s.studentId = (int)reader.GetValue(reader.GetOrdinal("id"));
val = reader.GetValue(reader.GetOrdinal("Roll"));
if (val != DBNull.Value)
{
s.roll = (string)val;
}
val = reader.GetValue(reader.GetOrdinal("St_name"));
if (val != DBNull.Value)
{
s.name = (string)val;
}
val = reader.GetValue(reader.GetOrdinal("batch"));
if (val != DBNull.Value)
{
s.batch = (string)val;
}
#endregion
sList.Add(s);
}
}
finally
{
connection.Close();
}
return sList;
}