Use VisualC #. net to complete a time daemon

Some people forget the time when they use their computers, so I want to make a small tool to implement the alarm function.

First of all, we need to design the user interface and introduce the ease of use, so we don't have to worry too much about anything. We need two TextBox, two buttons, and a few labels to display text prompts!
　　
After you have configured the control, you can write the code. One TextBox (textBox1 in the Code) is the prompt information to be displayed after the input time is reached. The other TextBox sets the time (textBox2 in the Code ). The TextBox format for setting the time is "00:00:00", so there are many limits. For example, you can only enter numbers, and the two colons cannot be modified. I designed the SimpleTextBox class to restrict the input of time. The SimpleTextBox class code is as follows:
　　
File: SimpleTextBox. cs
　　
UsingSystem;
　　
UsingSystem. Collections;
　　
UsingSystem. ComponentModel;
　　
UsingSystem. Drawing;
　　
UsingSystem. Data;
　　
UsingSystem. Windows. Forms;
　　
NamespaceSimpleTextBox
　　
{
　　
PublicclassSimpleTextBox: System. Windows. Forms. TextBox
　　
{
　　
Privatestringm_format; // set the display format of the time.
　　
Privatecharm_inpChar; // default character
　　
PublicSimpleTextBox ()

{

Base. Multiline = false;
　　
Base. MaxLength = 8;
　　
M_inpChar = 0;
　　
M_format = "00:00:00 ";
　　
}
　　
PrivateboolIsValidChar (charinput)
　　
{
　　
Return (char. IsDigit (input); // check whether it is a number
　　
}
　　
　　File: // heavyOnKeyPress Method for carrying TextBox
　　
Protectedoverrisponidonkeypress (KeyPressEventArgse)
　　
{
　　
Intstrt = base. SelectionStart;
　　
Intlen = base. SelectionLength;
　　
Intp;
　　
　　File: //Backspace key-> use the default character to replace the deleted location
　　
If (e. KeyChar = 0x08)
　　
{
　　
Strings = base. Text;
　　
P = Prev (strt );
　　
If (p! = Strt)
　　
{

Base. Text = s. Substring (0, p) + m_inpChar.ToString () + s. Substring (p + 1 );
　　
Base. SelectionStart = p;
　　
Base. SelectionLength = 1;
　　
}
　　
E. Handled = true;
　　
Return;
　　
}
　　
　　File: //Start display
　　
If (m_format [strt]! = M_inpChar)
　　
{
　　
Strt = Next (-1 );
　　
Len = 1;
　　
}
　　
　　File: // connectKeyboard Input
　　
If (IsValidChar (e. KeyChar ))
　　
{
　　
Stringt = "";
　　
T = base. Text. Substring (0, strt );
　　
T + = e. KeyChar. ToString ();
　　
If (strt + len! = Base. MaxLength)
　　
{
　　
T + = m_format.Substring (strt + 1, len-1 );
　　
T + = base. Text. Substring (strt + len );
　　
}

Else
　　
T + = m_format.Substring (strt + 1 );
　　
Base. Text = t;
　　
　　File: //One input character
　　
Strt = Next (strt );

Base. SelectionStart = strt;
　　
　　File: // m_caret = strt;
　　
Base. SelectionLength = 1;
　　
}
　　
E. Handled = true;
　　
}
　　
　　File: // setForward cursor Detection
　　
PrivateintPrev (intstartPos)
　　
{
　　
Intstrt = startPos;
　　
Intret = strt;
　　
While (strt> 0)
　　
{
　　
Strt --;
　　
If (m_format [strt] = m_inpChar)
　　
Returnstrt;
　　
}
　　
Returnret;
　　
}

　　File: // setCursor backward detection, returns the position of the next character
　　
PrivateintNext (intstartPos)
　　
{
　　
Intstrt = startPos;
　　
Intret = strt;
　　
While (strt
{
　　
Strt ++;
　　
If (m_format [strt] = m_inpChar)
　　
Returnstrt;
　　
}
　　
Returnret;
　　
}
　　
　　File: // heavyOnMouseUp event
　　
Protectedoverrisponidonmouseup (MouseEventArgse)
　　
{
　　
Intstrt = base. SelectionStart;
　　
Intorig = strt;
　　
Intlen = base. SelectionLength;
　　
　　File: // heavySet the start position
　　
If (strt = base. MaxLength | m_format [strt]! = M_inpChar)
　　
{
　　
　　File: // resetstart
　　
If (Next (strt) = strt)
　　
Strt = Prev (strt );
　　
Else
　　
Strt = Next (strt );
　　
Base. SelectionStart = strt;

}
　　
　　File: // heavySet the Selected length
　　
If (len <1)

Base. SelectionLength = 1;
　　
Elseif (m_format [orig + len-1]! = M_inpChar)
　　
{
　　
Len + = Next (strt + len)-(strt + len );
　　
Base. SelectionLengthlen;
　　
}
　　
Base. onMouseUp (e );
　　
}
　　
}
　　
}
　　
You can compile this class as a control and continue to use it later.
　　
The following is the TimerAlarm class, which uses a Timer class for timing and sends a prompt when the time is reached. The Code is as follows:
　　
UsingSystem;
　　
UsingSystem. Windows. Forms;
　　
UsingSystem. Threading;
　　
UsingSystem. Timers;

PublicclassTimerAlarm
　　
{

PrivateintclockTime = 0;
　　
PrivateintalarmTime = 0;
　　
Privatestringmessage = "time reached ";
　　
PrivateSystem. Timers. TimertimerClock = newSystem. Timers. Timer ();

PublicintAlarmTime

{

Set
　　
{
　　
AlarmTime = value;
　　
}
　　
}
　　
PublicintClockTime
　　
{
　　
Set
　　
{
　　
ClockTime = value;
　　
}
　　
}
　　
PublicstringMessage
　　
{
　　
Set
　　
{
　　
Message = value;
　　
}
　　
}
　　
　　
　　
PublicintCountdown
　　
{
　　
Get
　　
{
　　
ReturnalarmTime-clockTime;
　　
}
　　
}
　　
PublicTimerAlarm ()
　　
{
　　
　　File: // MessageBox. Show("TimeAlarmstart .");
　　
TimerClock. Elapsed + = newElapsedEventHandler (OnTimer );
　　
TimerClock. Interval = 1000;
　　
TimerClock. Enabled = true;
　　
}
　　
PublicvoidOnTimer (Objectsource, ElapsedEventArgse)
　　
{
　　
Try
　　
{
　　
ClockTime ++;
　　
If (clockTime = alarmTime)
　　
{
　　
MessageBox. Show (message, "time reached", MessageBoxButtons. OK, MessageBoxIcon. Warning );
　　
}
　　　　
}

Catch (Exceptionex)
　　
{
　　
MessageBox. Show ("OnTimer ():" + ex. Message );
　　
}

}
　　
PublicvoidStopTimer ()
　　
{
　　
TimerClock. Enabled = false;
　　
}
　　
}
　　
Then, the FormatConvert class is used. It provides two static methods. inputToSeconds () converts a string-type time string to a total of seconds.
　　
PublicstaticintinputToSeconds (stringtimerInput)
　　
{
　　
String [] timeArray = newstring [3];
　　
Intminutes = 0;
　　
Inthours = 0;
　　
Intseconds = 0;
　　
Required ccurence = 0;
　　
Intlength = 0;
　　
InttotalTime = 0;
　　
Occurence = timerInput. LastIndexOf (":");
　　
Length = timerInput. Length;
　　
　　File: // Checkforinvalidinput
　　
If (occurence =-1 | length! = 8)
　　
{
　　
MessageBox. Show ("Inval