C# Discussion Boards - CodeProject

Re: Decimal numbers in NET. Framework

5-Dec-20 2:48

Hello, I am creating a simple program in Framework to calculate the area of a triangle.

But the problem is, I can't enter a decimal number and the result is not a decimal number either. How should I solve this?

OriginalGriff5-Dec-20 2:53

C# NET. Framework program

5-Dec-20 2:53

Use decimal.TryParse[^] to convert it from a string to a decimal value.

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Member 150126775-Dec-20 0:59

5-Dec-20 0:59

Hi, I'

modified 5-Dec-20 8:33am.

OriginalGriff5-Dec-20 1:17

5-Dec-20 1:17

Read the string into a variable.
Then use string.Substring[^] to break it into three strings: one fro the day, one for the month, and one for the year.
Hint:

string s = "01092000";
string month = s.Substring(2, 2);
...

Then use int.TryParse[^] to convert each part to a numeric value.
Hint:

int mon;
if (!int.TryParse(month, out mon))
    {
    ... Report problem to user ...
    return;
    }

Then use the DateTime constructor[^] to make a valid date

Member 150126775-Dec-20 1:26

5-Dec-20 1:26

Can you give me please the full code for the program? I don't understand programming

Ralf Meier5-Dec-20 1:31

Ralf Meier

5-Dec-20 1:31

Sorry ... but if you don't understand programming and you are also not willing to try something - what are you trying to achieve ?

Member 150126775-Dec-20 1:33

5-Dec-20 1:33

I missed some classes at school because I had corona. In those lessons they started programming, but I have never programmed. So I really don't know where to start.

OriginalGriff5-Dec-20 1:41

5-Dec-20 1:41

Then you go back to your teacher and you ask for help - he knows you had Covid-19, so he knows you weren't just sitting around playing video games during a lockdown when you should have been studying.

But us just giving you the code doesn't help you at all in the long term, it makes it a lot worse!

OriginalGriff5-Dec-20 1:37

How to capture and print panel content into .pdf

5-Dec-20 1:37

Then it's time you started to learn.
This is a trivial task to get you thinking about the tools available to you, and how to use them to solve a problem; together with some very simple coding you need to do.

If I write the code then you skip all that - so the next (more complex) task is commensurately harder for you to do, and that process continues until you fail the course.

Read your notes, read the question, and give it a try. This may help: How to Write Code to Solve a Problem, A Beginner's Guide[^]

RedPandinus3-Dec-20 11:25

RedPandinus

3-Dec-20 11:25

Hi Everyone,

I added a panel which I will use it as signature drawing pad. I also use itextsharp for creating .pdf function. My question is how can I capture that drawing at panel and print it on .pdf document?

Below is panel code side. I created a button to make .pdf but I don't know how to code that button event.

private void panel1_MouseDown(object sender, MouseEventArgs e)
        {
            LastX = e.X;
            LastY = e.Y;
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            Graphics G = panel1.CreateGraphics();
            G.DrawLine(Pens.Black, PointX, PointY, LastX, LastY);
            LastX = PointX;
            LastY = PointY;
        }

        private void panel1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                PointX = e.X;
                PointY = e.Y;
                panel1_Paint(this, null);

Re: How to capture and print panel content into .pdf

Sandeep Mewara3-Dec-20 17:33

Sandeep Mewara

3-Dec-20 17:33

Please don't cross post: How to capture and print panel content into .pdf

Have patience and someone will respond. It's not good practice to post in multiple boards, you should pick one most appropriate and use it. Thanks.

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Re: How to capture and print panel content into .pdf

RedPandinus4-Dec-20 2:01

RedPandinus

4-Dec-20 2:01

Sorry Sandeep, I deleted another post. Thank you.

How to call function after timer

Member 141922163-Dec-20 8:07

3-Dec-20 8:07

Good evening everyone, I have a problem that crushes me. With my app developed in C #, everything works very except that I'm stuck somewhere and I try everything it does not work. Can someone show how to "call a function after the minute's number"? Using timer

OriginalGriff3-Dec-20 8:20

3-Dec-20 8:20

Create a Timer instance, set it's Interval property to 60 * 1000 (it ticks in 1/1000th of a second intervals), and add a handler to the Tick event before you start the timer.
After one minute you will get a Tick event and your handler method will be exectuted.
A minute later the same will happen again.

Member 141922163-Dec-20 8:25

3-Dec-20 8:25

Can you help me with the code ? Please

OriginalGriff3-Dec-20 9:01

3-Dec-20 9:01

What part of it can't you do on your own?
You know how to create an instance of a Timer, I assume?

Member 141922163-Dec-20 9:04

3-Dec-20 9:04

I'know how to create

OriginalGriff3-Dec-20 9:08

3-Dec-20 9:08

Good. So do that.
And you know how to set a property of an instance, yes?

Member 141922163-Dec-20 9:10

3-Dec-20 9:10

Yes

OriginalGriff3-Dec-20 9:25

3-Dec-20 9:25

Excellent!
And you know how to add an event handler, I'm sure?

Member 141922163-Dec-20 9:45

3-Dec-20 9:45

No sir

OriginalGriff3-Dec-20 10:02

3-Dec-20 10:02

Open Visual Studio.
Immediately after you set the Interval property, type the name of your Timer instance, followed by ".Tick":

myTimer.Interval = 60 * 1000;
myTimer.Tick

Press the Tab key. Intellisense will fill in the rest of the line, and create a Tick event handler for you, containing just a "not implemented" exception for you to replace with your code.

You've done that before, haven't you? It's pretty basic stuff!

Member 141922163-Dec-20 22:06