/// <summary>
/// Use to retrieve the list of available lab tests.
/// </summary>
/// <returns>All available lab tests</returns>
public static List<LabTest> GetAllLabTests()
{
List<LabTest> labTestList = new List<LabTest>();
try
{
using (SqlConnection connection = HealthCareDBConnection.GetConnection())
{
string selectStatement =
"SELECT * from LabTest";
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
connection.Open();
using (SqlDataReader reader = selectCommand.ExecuteReader())
{
while (reader.Read())
{
LabTest labTest = new LabTest();
labTest.TestId = (int) reader["testID"];
labTest.TestType = reader["testType"].ToString();
labTestList.Add(labTest);
}
}
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK);
}
return labTestList;
}
/// <summary>
/// Use to retrieve a specific lab tests.
/// </summary>
/// <returns>the lab test with the given id</returns>
public static LabTest GetLabTestByID(int id)
{
LabTest test = new LabTest();
try
{
using (SqlConnection connection = HealthCareDBConnection.GetConnection())
{
string selectStatement =
"SELECT * from LabTest where testID = @TESTID";
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
selectCommand.Parameters.AddWithValue("@TESTID", id);
connection.Open();
using (SqlDataReader reader = selectCommand.ExecuteReader())
{
while (reader.Read())
{
test.TestId = (int)reader["testID"];
test.TestType = reader["testType"].ToString();
}
}
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK);
}
return test;
}
private void btnUpdate_Click(object sender, EventArgs e)
{
bool edited = false;
try
{
LabTest newTest = new LabTest();
newTest.TestId = oldTest.TestId;
if(Validator.IsPresent(tbTestType))
{
newTest.TestType = tbTestType.Text;
edited = LabTestController.UpdateLabTest(oldTest, newTest);
}
if (!edited)
{
throw new Exception("The lab test was not updated.");
}
MessageBox.Show("The lab test was updated successfully.", "Update Successful!", MessageBoxButtons.OK, MessageBoxIcon.Information);
Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void btnSubmit_Click(object sender, EventArgs e)
{
//Validates required fields.
if (Validator.AreAllPresent(controls))
{
newTest = new LabTest();
newTest.TestType = tbTestType.Text;
try
{
int newTestID = LabTestController.AddLabTest(newTest);
MessageBox.Show("Success!", "Lab Test successfully added.", MessageBoxButtons.OK, MessageBoxIcon.Information);
ClearAllControls();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
public static bool UpdateLabTest(LabTest oldLabTest, LabTest newLabTest)
{
bool success = false;
try
{
using (SqlConnection connection = HealthCareDBConnection.GetConnection())
{
string updateStatement =
"UPDATE LabTest SET " +
"testType = @NewTestType " +
"WHERE testID = @OldTestID " +
"AND testType = @OldTestType";
using (SqlCommand updateCommand = new SqlCommand(updateStatement, connection))
{
updateCommand.Parameters.AddWithValue("@NewTestType", newLabTest.TestType);
updateCommand.Parameters.AddWithValue("@OldTestID", oldLabTest.TestId);
updateCommand.Parameters.AddWithValue("@OldTestType", oldLabTest.TestType);
connection.Open();
int count = updateCommand.ExecuteNonQuery();
if (count > 0)
{
success = true;
}
else
{
success = false;
}
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK);
}
return success;
}
public static int InsertLabTest(LabTest labTest)
{
int testID = -1;
try
{
using (SqlConnection connection = HealthCareDBConnection.GetConnection())
{
string insertStatement =
"INSERT LabTest " +
"(testType) " +
"VALUES (@TestType)";
using (SqlCommand insertCommand = new SqlCommand(insertStatement, connection))
{
insertCommand.Parameters.AddWithValue("@TestType", labTest.TestType);
connection.Open();
insertCommand.ExecuteNonQuery();
string selectStatement =
"SELECT IDENT_CURRENT('LabTest') FROM LabTest";
using (SqlCommand selectCommand = new SqlCommand(selectStatement, connection))
{
testID = Convert.ToInt32(selectCommand.ExecuteScalar());
}
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK);
}
return testID;
}
public static bool UpdateLabTest(LabTest oldLabTest , LabTest newLabTest)
{
return LabTestDB.UpdateLabTest(oldLabTest, newLabTest);
}
public static int AddLabTest(LabTest labTest)
{
return LabTestDB.InsertLabTest(labTest);
}
public frmEditTest(int testID)
{
InitializeComponent();
oldTest = LabTestController.GetLabTestByID(testID);
tbTestID.Text = "" + testID;
}
