/// <summary>
/// Function called when the user attempts to create a meeting.
/// The ErrorProvider only set an error if the event TextBox_Validating is fired. If the user presses
/// the schedule meeting button before this event can be triggered, it would appear as though the data is valid as
/// there would be no ErrorProvider message. Therefore, when that button is pressed, each control
/// must be validated.
/// </summary>
/// <returns>A boolean indicating whether the input data is valid or not.</returns>
private bool ValidateForm_CreateMeeting()
{
bool isValid = true;
//Lamda expression to compare the ErrorProviders error message with the constant ERRORMESSAGE.
//If they are equal, compareString returns true.
Func <string, bool> compareString = s => s == NULLDATAERRORMESSAGE;
//Alternative to writing IF statements that improve readability since the use far less lines
ClassLibrary.CheckTextBoxNotNull(TextBoxSelectedStudent, ErrorProvider);
isValid = compareString(ErrorProvider.GetError(TextBoxSelectedStudent)) ? false : isValid;
CheckDateTimePickerNotNull(DateTimePickerDate);
isValid = compareString(ErrorProvider.GetError(DateTimePickerDate)) ? false : isValid;
CheckDateTimePickerNotNull(DateTimePickerTime);
isValid = compareString(ErrorProvider.GetError(DateTimePickerTime)) ? false : isValid;
CheckListBoxNotNull(ListBoxStaffList);
isValid = compareString(ErrorProvider.GetError(ListBoxStaffList)) ? false : isValid;
//Whether the checkbox is checked or not determines which control to validate
if (CheckBoxCustomLength.Checked)
{
ClassLibrary.CheckTextBoxNotNull(TextBoxCustomLength, ErrorProvider);
isValid = compareString(ErrorProvider.GetError(TextBoxCustomLength)) ? false : isValid;
}
else
{
CheckListBoxNotNull(ListBoxMeetingLengths);
isValid = compareString(ErrorProvider.GetError(ListBoxMeetingLengths)) ? false : isValid;
}
return(isValid);
}
/// <summary>
/// Function to send data to the client.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonSendMessage_Click(object sender, EventArgs e)
{
const string NULLDATAERRORMESSAGE = "Field cannot be left empty";
//If there is no message to send, display an error message in the ErrorProvider
ClassLibrary.CheckTextBoxNotNull(TextBoxTypeMessage, ErrorProvider);
if (ErrorProvider.GetError(TextBoxTypeMessage) == NULLDATAERRORMESSAGE)
{
return;
}
//Encrypt the message and transmit it
string encryptedMessage = ClassLibrary.SymmetricEncryptDecrypt(TextBoxTypeMessage.Text, symmetricKey);
byte[] bt = Encoding.UTF8.GetBytes(encryptedMessage);
try
{
connectedClient.Client.Send(bt);
}
catch (Exception ex)
{
MyMessageBox.ShowMessage(ex.ToString());
return;
}
//Display the text in the list box
ListBoxChat.Items.Add(staffMember.StaffFirstName + ": " + TextBoxTypeMessage.Text + Environment.NewLine);
TextBoxTypeMessage.Clear();
}
private void ButtonSendMessage_Click(object sender, EventArgs e)
{
const string NULLDATAERRORMESSAGE = "Field cannot be left empty";
ClassLibrary.CheckTextBoxNotNull(TextBoxTypeMessage, ErrorProvider);
//As long as the user has some sort of input in the textbox, the message will send
if (ErrorProvider.GetError(TextBoxTypeMessage) == NULLDATAERRORMESSAGE)
{
return;
}
//Encrypt the message
string encryptedMessage = ClassLibrary.SymmetricEncryptDecrypt(TextBoxTypeMessage.Text, symmetricKey);
//Encode the message and send it
serverStream.Write(Encoding.UTF8.GetBytes(encryptedMessage), 0, Encoding.UTF8.GetByteCount(encryptedMessage));
serverStream.Flush();
//Display the message to the rich text box
sbSend.Clear();
sbSend.Append(student.StudentFirstName);
sbSend.Append(": ");
sbSend.Append(TextBoxTypeMessage.Text);
sbSend.Append(Environment.NewLine);
RichTextBoxChatWindow.SelectionColor = Color.Blue;
RichTextBoxChatWindow.AppendText(sbSend.ToString());
TextBoxTypeMessage.Clear();
}
/// <summary>
/// Checks that the user input data is valid.
/// </summary>
/// <returns>A boolean indicating whether the input data is
/// valid or not.</returns>
private bool ValidateForm()
{
const string NULLDATAERRORMESSAGE = "Field cannot be left empty";
bool isValid = true;
Func <string, bool> compareString = s => s == NULLDATAERRORMESSAGE;
ClassLibrary.CheckTextBoxNotNull(TextBoxOldPassword, ErrorProvider);
isValid = compareString(ErrorProvider.GetError(TextBoxOldPassword)) ? false : isValid;
ClassLibrary.CheckTextBoxNotNull(TextBoxNewPassword, ErrorProvider);
isValid = compareString(ErrorProvider.GetError(TextBoxNewPassword)) ? false : isValid;
ClassLibrary.CheckTextBoxNotNull(TextBoxReTypePassword, ErrorProvider);
isValid = compareString(ErrorProvider.GetError(TextBoxReTypePassword)) ? false : isValid;
return(isValid);
}
/// <summary>
/// Checks that the user input data is valid.
/// </summary>
/// <returns>A boolean indicating whether the
/// input data is valid or not.</returns>
private bool ValidateForm_AddNote()
{
bool isValid = true;
//Lamda expression to compare the ErrorProviders
//error message with the constant NULLDATAERRORMESSAGE.
//If they are equal, compareString returns true.
Func <string, bool> compareString = s => s == NULLDATAERRORMESSAGE;
ClassLibrary.CheckTextBoxNotNull(TextBoxNote, ErrorProvider);
//Alternative to writing IF statements that improves
//readability since they use far less lines.
isValid = compareString(ErrorProvider.GetError(TextBoxNote)) ? false : isValid;
return(isValid);
}
/// <summary>
/// Checks that the user input data is valid.
/// </summary>
/// <returns>A boolean indicating whether the input data is valid or not.</returns>
private bool ValidateForm()
{
const string NULLDATAERRORMESSAGE = "Field cannot be left empty";
bool isValid = true;
//Lamda expression to compare the ErrorProviders error message with the
//constant NULLDATAERRORMESSAGE. If they are equal, compareString returns true.
Func <string, bool> compareString = s => s == NULLDATAERRORMESSAGE;
//Each control that has user input data must be checked.
ClassLibrary.CheckTextBoxNotNull(TextBoxUsername, ErrorProvider);
//Alternative to writing IF statements that improves readability since they use far less lines.
//If compareString returns true, then isValid is set to false as this means the
//ErrorProvider has set an error so the input is invalid.
isValid = compareString(ErrorProvider.GetError(TextBoxUsername)) ? false : isValid;
ClassLibrary.CheckTextBoxNotNull(TextBoxPassword, ErrorProvider);
isValid = compareString(ErrorProvider.GetError(TextBoxPassword)) ? false : isValid;
return(isValid);
}
private void TextBoxPassword_Validating(object sender, CancelEventArgs e)
{
//Checks that the TextBoxPassword contains data
ClassLibrary.CheckTextBoxNotNull(TextBoxPassword, ErrorProvider);
}
private void TextBoxSelectedStudent_Validating(object sender, CancelEventArgs e)
{
ClassLibrary.CheckTextBoxNotNull(TextBoxSelectedStudent, ErrorProvider);
}
//Events
private void TextBoxCustomLength_Validating(object sender, CancelEventArgs e)
{
ClassLibrary.CheckTextBoxNotNull(TextBoxCustomLength, ErrorProvider);
}
