/// <summary>
/// Gets open incidents for the specified technician
/// </summary>
/// <param name="technicianID">id of technician</param>
/// <returns>list of open incidents</returns>
internal List <Incident> GetOpenIncidentsForTechnician(int technicianID)
{
List <Incident> incidents = new List <Incident>();
string selectStatement = "SELECT p.Name as ProductName, i.dateOpened, c.Name as CustomerName, i.Title " +
"FROM incidents i " +
"join technicians t on t.techID = i.techID AND i.dateClosed is null and i.techid = @TechID " +
"join products p on i.productCode = p.productCode " +
"join Customers c on i.customerID = c.CustomerID;";
using (SqlConnection connection = TechSupportDBConnection.GetConnection())
{
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
selectCommand.Parameters.AddWithValue("@TechID", technicianID);
connection.Open();
using (SqlDataReader reader = selectCommand.ExecuteReader())
{
while (reader.Read())
{
incidents.Add(new Incident
{
ProductName = reader["ProductName"].ToString(),
DateOpened = (DateTime)reader["DateOpened"],
CustomerName = reader["CustomerName"].ToString(),
Title = reader["Title"].ToString()
});
}
}
}
}
return(incidents);
}
/// <summary>
/// Pulls list of customers from DB
/// </summary>
/// <returns>List of customers</returns>
internal List <Customer> GetCustomers()
{
List <Customer> customerList = new List <Customer>();
string selectStatement = "SELECT * FROM Customers;";
using (SqlConnection connection = TechSupportDBConnection.GetConnection())
{
connection.Open();
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
using (SqlDataReader reader = selectCommand.ExecuteReader())
{
while (reader.Read())
{
customerList.Add(new Customer
{
CustomerID = (int)reader["CustomerID"],
Name = reader["Name"].ToString(),
Address = reader["Address"].ToString(),
City = reader["City"].ToString(),
State = reader["State"].ToString(),
ZipCode = reader["ZipCode"].ToString(),
Phone = reader["Phone"].ToString(),
Email = reader["Email"].ToString()
});
}
}
}
}
return(customerList);
}
/// <summary>
/// Retrieves all technicians from the database.
/// </summary>
/// <returns>List of technicians</returns>
internal List <Technician> GetTechnicians()
{
List <Technician> technicians = new List <Technician>();
string selectStatement = "SELECT * FROM Technicians;";
using (SqlConnection connection = TechSupportDBConnection.GetConnection())
{
connection.Open();
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
using (SqlDataReader reader = selectCommand.ExecuteReader())
{
while (reader.Read())
{
technicians.Add(new Technician
{
TechID = (int)reader["TechID"],
Name = reader["Name"].ToString(),
Email = reader["Email"].ToString(),
Phone = reader["Phone"].ToString()
});
}
}
}
}
return(technicians);
}
/// <summary>
/// Returns a list of Technicians who have open incidents
/// </summary>
/// <returns>list of technicians</returns>
internal List <Technician> GetTechniciansWithOpenIncidents()
{
List <Technician> technicians = new List <Technician>();
string selectStatement = "SELECT distinct t.techID, t.Name, t.Email, t.Phone from Technicians t join Incidents i on t.TechID = i.techid AND i.dateClosed is null;";
using (SqlConnection connection = TechSupportDBConnection.GetConnection())
{
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
connection.Open();
using (SqlDataReader reader = selectCommand.ExecuteReader())
{
while (reader.Read())
{
technicians.Add(new Technician
{
TechID = (int)reader["TechID"],
Name = reader["Name"].ToString(),
Email = reader["Email"].ToString(),
Phone = reader["Phone"].ToString()
});
}
}
connection.Close();
}
}
return(technicians);
}
/// <summary>
/// Pulls products from DB
/// </summary>
/// <returns>List of Products</returns>
internal List <Product> GetProducts()
{
List <Product> productList = new List <Product>();
string selectStatement = "SELECT * FROM Products;";
using (SqlConnection connection = TechSupportDBConnection.GetConnection())
{
connection.Open();
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
using (SqlDataReader reader = selectCommand.ExecuteReader())
{
while (reader.Read())
{
productList.Add(new Product
{
ProductCode = reader["ProductCode"].ToString(),
Name = reader["Name"].ToString(),
Version = (decimal)reader["Version"],
ReleaseDate = (DateTime)reader["ReleaseDate"]
});
}
}
}
connection.Close();
}
return(productList);
}
/// <summary>
/// Returns a single incident based on ID
/// </summary>
/// <param name="incidentID">id of incident</param>
/// <returns>incident</returns>
internal Incident GetIncident(int incidentID)
{
string selectStatement = "SELECT i.IncidentID, i.CustomerID, c.Name as CustomerName, i.ProductCode, i.Title, i.Description, i.TechID, t.Name as Technician, i.DateOpened, i.DateClosed " +
"FROM incidents i " +
"LEFT JOIN Customers c on i.CustomerID = c.CustomerID " +
"LEFT JOIN Technicians t on t.TechID = i.TechID " +
"WHERE IncidentID = @IncidentID;";
using (SqlConnection connection = TechSupportDBConnection.GetConnection())
{
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
connection.Open();
selectCommand.Parameters.AddWithValue("@IncidentID", incidentID);
using (SqlDataReader reader = selectCommand.ExecuteReader())
{
Incident incident = new Incident();
if (reader.Read())
{
incident.IncidentID = (int)reader["IncidentID"];
incident.CustomerID = (int)reader["CustomerID"];
incident.CustomerName = reader["CustomerName"].ToString();
incident.ProductCode = reader["ProductCode"].ToString();
incident.Title = reader["Title"].ToString();
incident.Description = reader["Description"].ToString();
incident.DateOpened = (DateTime)reader["DateOpened"];
if (reader["TechID"] == DBNull.Value)
{
incident.TechnicianID = -1;
}
else
{
incident.TechnicianID = (int)reader["TechID"];
incident.TechnicianName = reader["Technician"].ToString();
}
if (!(reader["DateClosed"] == DBNull.Value))
{
incident.DateClosed = (DateTime)reader["DateClosed"];
}
connection.Close();
return(incident);
}
}
}
}
return(null);
}
/// <summary>
/// Adds an incident to the databse
/// </summary>
/// <param name="customerID">customerID as int</param>
/// <param name="productCode">ProductCode as string</param>
/// <param name="title">Title as string</param>
/// <param name="description">Description as string</param>
/// <returns>returns int result based on whether query executed</returns>
internal int AddIncident(Incident incident)
{
using (SqlConnection connection = TechSupportDBConnection.GetConnection())
{
string insertStatement = "INSERT Incidents" +
"(CustomerID, ProductCode, DateOpened, Title, Description)" +
"VALUES (@CustomerID, @ProductCode, getdate(), @Title, @Description);";
connection.Open();
using (SqlCommand insertCommand = new SqlCommand(insertStatement, connection))
{
insertCommand.Parameters.AddWithValue("@CustomerID", incident.CustomerID);
insertCommand.Parameters.AddWithValue("@ProductCode", incident.ProductCode);
insertCommand.Parameters.AddWithValue("@Title", incident.Title);
insertCommand.Parameters.AddWithValue("@Description", incident.Description);
int result = insertCommand.ExecuteNonQuery();
return(result);
}
}
}
/// <summary>
/// Returns the list of incidents with no close date
/// </summary>
/// <returns>List of open incidents</returns>
internal List <Incident> GetOpenIncidents()
{
List <Incident> incidentList = new List <Incident>();
string selectStatement =
"SELECT i.IncidentID, i.CustomerID, i.TechID as TechID, i.ProductCode, i.DateOpened, c.Name as Customer, t.Name as Technician, i.Title, i.Description " +
"from Incidents i " +
"LEFT JOIN Technicians t on i.TechID = t.TechID " +
"LEFT JOIN Customers c on i.CustomerID = c.CustomerID " +
"WHERE i.dateClosed IS NULL;";
using (SqlConnection connection = TechSupportDBConnection.GetConnection())
{
connection.Open();
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
using (SqlDataReader reader = selectCommand.ExecuteReader())
{
while (reader.Read())
{
Incident incident = new Incident
{
IncidentID = (int)reader["IncidentID"],
CustomerID = (int)reader["CustomerID"],
ProductCode = reader["ProductCode"].ToString(),
DateOpened = (DateTime)reader["DateOpened"],
CustomerName = reader["Customer"].ToString(),
TechnicianName = reader["Technician"].ToString(),
Title = reader["Title"].ToString(),
Description = reader["Description"].ToString()
};
incidentList.Add(incident);
}
}
}
}
return(incidentList);
}
/// <summary>
/// Adds incident to DB
/// </summary>
/// <param name="oldIncident">previous incident to match</param>
/// <param name="newIncident">incident to add to db</param>
/// <returns>true if successful, false otherwise</returns>
internal bool UpdateIncident(Incident newIncident, Incident oldIncident)
{
string updateStatement = "UPDATE Incidents SET " +
"CustomerID = @CustomerID, " +
"ProductCode = @ProductCode, " +
"TechID = @TechID, " +
"DateClosed = @DateClosed, " +
"Title = @Title, " +
"Description = @Description " +
"WHERE IncidentID = @OldIncidentID " +
"AND CustomerID = @OldCustomerID " +
"AND ProductCode = @OldProductCode " +
"AND (TechID = @OldTechID " +
"OR TechID IS NULL AND @OldTechID IS NULL) " +
"AND DateOpened = @OldDateOpened " +
"AND (DateClosed = @OldDateClosed OR DateClosed IS NULL AND @OldDateClosed IS NULL) " +
"AND Title = @OldTitle " +
"AND Description = @OldDescription;";
using (SqlConnection connection = TechSupportDBConnection.GetConnection())
{
connection.Open();
using (SqlCommand updateCommand = new SqlCommand(updateStatement, connection))
{
updateCommand.Parameters.AddWithValue("@IncidentID", newIncident.IncidentID);
updateCommand.Parameters.AddWithValue("@OldIncidentID", oldIncident.IncidentID);
updateCommand.Parameters.AddWithValue("@CustomerID", newIncident.CustomerID);
updateCommand.Parameters.AddWithValue("@OldCustomerID", oldIncident.CustomerID);
updateCommand.Parameters.AddWithValue("@ProductCode", newIncident.ProductCode);
updateCommand.Parameters.AddWithValue("@OldProductCode", oldIncident.ProductCode);
if (newIncident.TechnicianID == -1)
{
updateCommand.Parameters.AddWithValue("@TechID", DBNull.Value);
}
else
{
updateCommand.Parameters.AddWithValue("@TechID", newIncident.TechnicianID);
}
if (oldIncident.TechnicianID == -1)
{
updateCommand.Parameters.AddWithValue("@OldTechID", DBNull.Value);
}
else
{
updateCommand.Parameters.AddWithValue("@OldTechID", oldIncident.TechnicianID);
}
if (newIncident.DateClosed == DateTime.MinValue)
{
updateCommand.Parameters.AddWithValue("@DateClosed", DBNull.Value);
}
else
{
updateCommand.Parameters.AddWithValue("@DateClosed", newIncident.DateClosed);
}
if (oldIncident.DateClosed == DateTime.MinValue)
{
updateCommand.Parameters.AddWithValue("@OldDateClosed", DBNull.Value);
}
else
{
updateCommand.Parameters.AddWithValue("@OldDateClosed", oldIncident.DateClosed);
}
updateCommand.Parameters.AddWithValue("@Title", newIncident.Title);
updateCommand.Parameters.AddWithValue("@OldTitle", oldIncident.Title);
updateCommand.Parameters.AddWithValue("@Description", newIncident.Description);
updateCommand.Parameters.AddWithValue("@OldDescription", oldIncident.Description);
updateCommand.Parameters.AddWithValue("@OldDateOpened", oldIncident.DateOpened);
// shows message box of query before command executes
//string query = updateCommand.CommandText;
//foreach (SqlParameter p in updateCommand.Parameters)
//{
// query = query.Replace(p.ParameterName, p.Value.ToString());
//}
//MessageBox.Show(query);
int count = updateCommand.ExecuteNonQuery();
connection.Close();
return(count > 0);
}
}
}