Develop Reference

Bring custom control to front

I recently started to learn C# and right now I want to mess arouwnd with the Form[Design].
Right now I'm trying to BringToFront() custom controls each time I hover over a button (Ive got a few buttons close to each other, each time I hover over them I get a certain User Control).
This is what I've got so far:
private void button1_Hover(object sender, EventArgs e)
{
costumControl1.BringToFront();
}
private void button1_Leave(object sender, EventArgs e)
{
CostumControl0.BringToFront();
}
private void button2_Hover(object sender, EventArgs e)
{
costumControl2.BringToFront();
}
private void button2_Leave(object sender, EventArgs e)
{
CostumControl0.BringToFront();
}
private void button3_Hover(object sender, EventArgs e)
{
costumControl3.BringToFront();
}
private void button3_Leave(object sender, EventArgs e)
{
CostumControl0.BringToFront();
}
But bringing to front the user control costumControl0 when I hover from a button to another it's not what I want.
But I don't know how to go about this.
Is it possible to just add a if statement where I check if I'm not hovering the buttons close to my current one and then display the costumControl0.
Or a timer is necessary to delay the display of the costumControl0 and skip the command if I'm starting another event.
If the timer is needed, can I use one timer for all of the buttons or do I need to create one for each?
Or whats the best approach for this?

Trying to change output for a timer in a form in c#

I need to make a form in C# have a timer and have a label that will have be the display of the timer. The label will need to be a generic label at first saying it is a counter, but when the timer starts it needs to display the count. Currently I have the display as a number up down but, it needs to be the control that can tweak the count, which it does. It just can't be the sole counter.
Here is my assignment:
Create a Windows Application. In the main form, create a label named “lTickCount”.
Create a timer named “tPeriodic”, and a numerical control of your own choosing.
Each time the timer “ticks” increment an integer, display the integer value as a string in
lTickCount. Use the numerical control to change the update rate of the timer
interactively.
I think I have done everything correctly except for the bold part. To finish I tried to make a string in both the label and the counter. I know I shouldn't have in both, I just wanted to show you the two things I've tried to help get better feedback:
namespace WindowsFormsApplication3
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.Text = "AAAAAAAA AAAAAAAA ########";
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
TickCounter.Text = "The timer has started";
tPeriodic.Enabled = true;
}
else
{
TickCounter.Text = "The timer has ended";
tPeriodic.Enabled = false;
}
}
private void TickCounter_ValueChanged(object sender, EventArgs e)
{
TickCounter.Text = TickCounter.Value.ToString();
}
private void tPeriodic_Tick(object sender, EventArgs e)
{
TickCounter.Value += 1;
}
private void label1_Click(object sender, EventArgs e)
{
TickCounter.Text = TickCounter.Value.ToString();
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
}
Can someone help me figure out what I'm doing wrong and point me in the right way?

If you are going to try to add to a string (A label value) you need to convert it to an Integer first.
A couple ways to do this:
TextCount.Text = (Convert.ToInt32(TextCount.Text) + 1).ToString();
is one way, of course you could still use your += or any other math syntax for basic addition of +1.
You can also use tryParse, and in fact this should probably be used to verify you have an integer in the first place:
int count;
if (int.TryParse(TextCount.Text, out count))
{
count++;
TextCount.Text = count.ToString();
}

int count;
int tmrInterval = 1000; //1 sec
private void tPeriodic_Tick(object sender, EventArgs e)
{
count++;
lTickCount.Text = count.ToString();
}
private void TickCounter_ValueChanged(object sender, EventArgs e)
{
if (TickCounter.Value == 0)
{
return; // or stop the timer
}
tPeriodic.Interval = TickCounter.Value * tmrInterval;
}
tPeriodic.Interval is the time till next tick in milliseconds.
You are updating the timer interval according to tmrInterval and the value of the numeric control. You can change the interval or the formula i wrote to your own.
valter

Ok I found that:
tPeriodic.Interval = 1000 / Convert.ToInt32(TickCounter.Value * TickCounter.Value);
seemed to work in the numericupdown class.
Thanks for the help.

I want to make a picturebox disappear after a certain time has passed without using a control

Hello I am kind of new to C#... I have a picturebox which is my control. It's meant to be rapidly clicked on. I want to make it so when it is clicked a certain amount of times a second picturebox which has a .gif in it becomes visible. And when a certain amount of time has past without clicking the first picturebox the second disappears. Is there a way to do this? Maybe with timers. Some sample code will help me out A LOT! Thanks to all in advance! :)

Try This:
System.Windows.Forms.Timer timer1 = new System.Windows.Forms.Timer();
timer1.Interval=60000;//one minute
timer1.Tick += new System.EventHandler(timer1_Tick);
timer1.Start();
private void pictureBox1_Click(object sender, EventArgs e)
{
timer1.Stop();
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
//do whatever you want
pictureBox2.Visible = false;
}

C# Creating a Timer that at a specific values changes a label

I am new to C#, and I have searched I but didn't find a simple solution to my problem.
I am creating a Windows form application.
After the start button is clicked, it counts every millisecond and when it reaches specific values from an array changes a label.
How can milliseconds be counted?
-------------------------
AlekZanDer Code:
namespace timer_simple3
{
public partial class Form1 : Form
{
long result = 0;
public Form1()
{
InitializeComponent();
this.timer1 = new System.Windows.Forms.Timer(this.components);
}
private void Form1_Load(object sender, EventArgs e)
{
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
}
private void timer1_Tick(object sender, EventArgs e)
{
result = result + 1;
label1.Text = Convert.ToString(result);
}
private void btstart_Click(object sender, EventArgs e)
{
timer1.Interval = 1; //you can also set this in the
//properties tab
timer1.Enabled = true;
timer1.Start();
// label1.Text = Convert.ToString(timer1);
}
private void btstop_Click(object sender, EventArgs e)
{
timer1.Stop();
}
}
}

How can milliseconds be counted?
You can't do that, because Windows Forms Timer component is single-threaded, and is limited to an accuracy of 55 milliseconds. If you require a multithreaded timer with greater accuracy, use the Timer class in the System.Timers namespace.
Also any other timer will not give you accuracy more than 16 milliseconds (actually 15.625 milliseconds, or 64Hz). So, you can't increment some counter to count elapsed milliseconds.
Option for you - instead of long result counter use difference between current time and time of timer start:
label1.Text = (DateTime.Now - startDateTime).Milliseconds.ToString();

First you have to create a method that tells the timer what to do every [put the needed number here] milliseconds.
private void randomTimer_Tick(object sender, EventArgs e)
{
if (conditions)
{
... //stuff to do
... //more stuff to do
... //even more stuff to do
}
}
Then you set the timer to call this method: you can do this by using the events tab of the properties of the timer or write:
this.randomTimer1.Tick += new System.EventHandler(this.randomTimer1_Tick);
in the ProjectName.Designer.cs file in the private void InitializeComponent(){} method after the line this.randomTimer = new System.Windows.Forms.Timer(this.components);.
And lastly you enable the timer:
private void startButton (object sender, EventArgs e)
{
randomTimer.Interval = timeInMilliseconds; //you can also set this in the
//properties tab
randomTimer.Enabled = true;
}
Of course, you will have to set the button to call this method too.
If you don't know where the Properties window is (I assume that you are using Visual C#): it's usually a tab located on the right side of the window. In order something to appear in the tab, you have to select the form you want to edit in the design view. If there is no such tab anywhere in the window of the compiler, go to "View" -> "Other Windows" and select "Properties Window".
If the answers you have found are long and complicated, that's mostly because they are explaining the whole process with details and examples. If you use the "drag and drop" option of Visual C#, the declaration code of the forms will happen automatically, afterwards it's up to you to write the code of the methods. There are also other features that are self explanatory and make programming more pleasant. Use them!

Gradually or smoothly change object size (Checkboxlist)?

C# question
Here is what I am trying to do. When I click a button, I want the checkboxlist to smoothly change from say (200,10) to (200,100) in size. I am successful at getting to size to change instantaneously, but I want it to look smooth.
Here is the code I wrote:
private void Form1_Load(object sender, EventArgs e)
{
timer1.Interval = 1;
}
private void button1_Click(object sender, EventArgs e)
{
timer1.Enabled = true;
}
private void timer1_Tick(object sender, EventArgs e)
{
if (checkedListBox1.Height < 100)
{
checkedListBox1.Size = new Size(checkedListBox1.Size.Width, checkedListBox1.Size.Height + 1);
}
else
{
timer1.Enabled = false;
}
}
I have used this coding to move objects smoothly, but never to change sizes.
So when you run this code, the box just flickers and it seems like its trying to change size, but it doesn't, and the loop never ends.
Thanks!

You need to set IntegralHeight to false to that the box can be a height that is not a multiple of the item height.
For the flickering, you should probably double-buffer the form which contains this control.