Comments by ________________ (Top 70 by date)

typeof(string).Assembly.FullName -> 446
Object.GetType -> 351

with this code (similar to yours):

public static void Test1()
		{
			Stopwatch test = new Stopwatch();

			test.Start();			
			typeof_string();			
			test.Stop();
			Console.WriteLine(string.Format("typeof(string).Assembly.FullName   ->  {0}", test.ElapsedTicks));
			test.Reset();
			
			test.Start();			
			GetType_FullName();			
			test.Stop();
			Console.WriteLine(string.Format("Object.GetType   ->  {0}", test.ElapsedTicks));

		}

		private static string typeof_string()
		{
			return typeof(string).Assembly.FullName;
		}

		
		private static string GetType_FullName()
		{
			return String.Empty.GetType().Assembly.FullName;
		}

What should I think? Core .NET Stopwatch is wrong, third-party miracle "framework" is right?

Heh, last time enormous amount of "frameworks" was developed only for sell it and get profit...

I prefer to use low-level tools when it possible, and every application has bugs...
Send this case to benchmark developers. :-)

-- you're doing this for the wrong reasons.
Will you pay me for answers?

:-))))))))))))

So you judge somebody only by you opinion about what is right and what is wrong?
How do you know, who is student? According text of message? Who gave you right to be The Great Censor?
Pay attention - I even do not suggest you to delete your off-topic "Solution1", it is not my problem also, but I do suggest - next time write "I am not here" instead of "We're not here".

No, you are wrong... agree that this is strange - typeof(string) looks like "low level" language command, but:

typeof(string).Assembly.FullName -> 901
Object.GetType -> 899
typeof(string).Assembly.FullName -> 1765
Object.GetType -> 871



The code of test :

Stopwatch test = new Stopwatch();

test.Start();
for (int i = 0; i < 10000; i++)
{
string dll_Name = typeof(string).Assembly.FullName;
}
test.Stop();
Console.WriteLine(string.Format("typeof(string).Assembly.FullName -> {0}", test.ElapsedTicks));


test.Reset();

string ooo = "";
test.Start();
for (int i = 0; i < 10000; i++)
{
string dll_Name = ooo.GetType().Assembly.FullName;
}
test.Stop();
Console.WriteLine(string.Format("Object.GetType -> {0}", test.ElapsedTicks));




test.Start();
for (int i = 0; i < 10000; i++)
{
string dll_Name = typeof(string).Assembly.FullName;
}
test.Stop();
Console.WriteLine(string.Format("typeof(string).Assembly.FullName -> {0}", test.ElapsedTicks));

test.Reset();


test.Start();
for (int i = 0; i < 10000; i++)
{
string dll_Name = ooo.GetType().Assembly.FullName;
}
test.Stop();
Console.WriteLine(string.Format("Object.GetType -> {0}", test.ElapsedTicks));

XmlReader - can only read the file forward, its stream could be connected to network file. Its benefits is performance and light weight.

XmlDocument - can construct and change the loaded xml, add nodes etc... But it relatively slow and takes more memory.

You decide what you need to use - according your demands.

It depends on file size. If file really big - 1 gigabyte, 100 MB and 10 files at same time - .NET gives ability to read it partially via Stream (I speak about local file on disk).
If you need to read one XML with size even 30 MB - simple use existing functions that can do it. Immediate computer now has 4 GB of memory. It is not forbidden to use it.

Probably you should give changed CultureInfo to all application, so standard formatting in you application will use changed separations (as you define).
If you need double-digit comma only in one place- best practice is to make it visible and clear.

Regular volunteer or mentor-professor?
I came to this forum to answer to questions I can answer and get the rating.
It is kind of online game for me. Why not?
Source of question - this is not my problem. But I feel disappointed when my correct code was deleted, because it is probably homework for lazy student.
Well, if you so social oriented, and want to learn the others how to live, be smart enough to do it gently. I even do not speak about loosing new users. What they will do, when instead of answer to "stupid" question on this "smart" (or snob?) forum they will read "Solution 1 - Go away lazy student! We see that you!"?

If you can print one page, probably you can print many pages...

But it seems you should generate the pages dynamically from code, then send it ti printer one-by one...

Compiler need case if nothing defined:

public static string FooImpl()
{
#if NETSTANDARD2_0
return "NETSTANDARD";
#elif NET461
return "NETFRAMEWORK";
#endif
return "";
}

Have a look at https://www.codeproject.com/Articles/827091/Csharp-Attributes-in-minutes

.NET has modern tools (not just preprocessor). If you need to calculate something on compilation stage - use attributes.

You can download file, then read it from local folder.
And fix second row - display.Text = File.ReadAllText(path);

I doubt that Stream in .NET could be the reason.
This is standard object to assess files, it used everywhere, when you use File.LoadAllText() or doc.Load(file) - the Stream works inside.

By my opinion, use try-catch instead of of-else - bad idea.
Something happens, you do not know what, and continue... not good.

Check all data well before - decide what you should do if null, if empty and so on.

Master data - Table of "PatientSex". :-)
Male,Female, other...
It is interesting! If not for you - you have selected wrong profession.

Than you should undestand tha Registration DB has two big categories of data - "Master" data, and Documents.
Master data - it is PatientRefererTypes table (have limited amount of rows, define non-concrete thing) and so on, Documents - it is "Patients" table - many concrete patients every day.

Types of data also should not be freeze in static construction -
So you need to have table "PatientRefererTypes" - and than you can have rows in this table: "Doctor", "Self", "HMO", "Ambulance"....

Try to think about common things:
Not HMO and Doctor tables, but PatientReferer - because it has same fields - Name etc.

Hi! When you say "We" - what do you mean? How many are you?
This is second time when I meet on this site such opinion...
Am I miss a role - "Doing homework is forbidden!" ? Where?
:-\

I fixed only one row!

Check your inputs, Convert to double may trow exception,
or you are collecting data from textboxes incorrect....


double Quantity1 = Convert.ToDouble("1.00");
double Price1 = Convert.ToDouble("60.0");
double Price2 = 0;
double Quantity2;

try
{
Price2 = Convert.ToDouble("51.0");
Quantity2 = Quantity1 / Price1 * Price2;//Fixed *
txtqty.Text = Quantity2.ToString("F2");
}
catch(Exception ex)
{

}

*When you already works with double, there is no conversion needed.

This is the best solution.
I did elapsed ticks test for all 3 answers 10000 repetitions:

string.Join -> 870894
names.Aggregate -> 19875057
AllNamesSeparatedByComma -> 1528247

Check the network settings - are you sure, for example, that TCP/IP have been installed and configured on all machines in your network? Are all needed ports opened?

No, if this columns has type DateTime - you cannot save data as you want, only as DateTime allow.
If this property-field has type string (nvarchar() in SQL) - it allow you save the data as you wish, but it is more difficult to use.

Ok, If we are speaking about linq - what is the type of properties "date_from" and "date_To" that you see in code?
String or DateTime?

Just going according the rules! ;-)

1/60== X/51.

X = 1/60 * 51

Only so it is correct:
60 rs for 1 kg.
1 kg per 60 rs.

This give proportion, and unknown quantity could be calculated, if one member (51rs) is known.
The result of your example is 850 gram.

Do you must use so low level? I explain - if not, all possible problem with multi connection(and many more!) already solved in WCF.
Socket connections remains if you need to connect to external non-windows system - Linux comp or device. If you make something for use, not for test, I do not understand why not to use existing code.

All simple - if you need same behavior from controls - best way is to create UserControl.
In code of UserControl - you once add all needed validations, than simple drag and drop this new element to your form from designer.
It is ability to add custom properties - so you could change the validation principal also from designer.

Believe me, I had same opinion - because my experience in Winform and obsolete demands to gui (press button - see table). You will change you mind when your knowledge level of Winform and WPF became comparable.

Good, but StackPanel will arrange the inner controls automatically. I agree, the design will be completely different, but it will solve the problem with margins and anchors fine tuning....

Topicaster want to make a game. Games on winforms - was looking terrible, and always has pure performance.
When you use even standard WPF controls - with simple adding shadows and round corners - you will have modern look and smooth motion. Override "OnPaint" of Winform control, and draw something adequate on screen - much more difficult.

What is the type of columns "date_from" and "date_To"?

What are you using for DB access?

So, in you sentence- "Class" - it is "Type" because it is not simple type - as integer, byte....
Correct meaning depends of what are we speaking about - Java, C, C++, C#....

Each "programming thing (byte as smallest store unit)" has its own address in RAM (Random Assess Memory).
So, the problem how to store more than 1 byte was solved by defining "types of data" in high-level languages.
Simple types - integer for example, was converted to full stack class in .NET (and it has methods "ToString()"), but remains simple pointer to address of first byte in C++ or Java.

For programmer - "type" is only definition of how to save-read data from memory.
"Instance" - it is real place in memory, occupied by data.

WCF (Windows Communication Foundation) could be hosted as Windows service and even console application, could have http binding at the endpoint, could build on server-side any html page, but... I think things like redirect, navigation and so on - you should implement yourself...

Ok.
This is second name of table in DB...

Do you already have an DB service? If no - the easiest way to save data on computer - is file.
You "DB" could be simple comma-separated text file, with pairs "Question - Answer".
Application will read this file to collection (List<>), and will work with this list.
As addition - We can use Queue<>, or Stack<>, or Dictionary<,> as data container...

What is "FOL"?

Winform is not suitable for graphical presentations. Use WPF. Yes, it takes time to understand the logic of StoryBoard and Behavior, but than you will create usable modern application.

Great challenge! What is next - self-made Sunset?
:-)
Why you cannot use IIS?

Why you need this code : --- .Value.Replace("data:image/png;base64,", String.Empty); ---- ?
Can you open and see the image in usual image editor (Paint for example) after such replacement?

SqlCommand cmd = new SqlCommand(conn, query); - incorrect.

should be

SqlCommand cmd = new SqlCommand(query, conn);

I suggest to check current InstanceContextMode (https://www.codeproject.com/Articles/188749/WCF-Sessions-Brief-Introduction) of you WCF service.
It could be set "PerCall" - so each time you will have new service object.
Try to set it "PerSession".

When you will be tired of low-level problems, have a look at WCF (https://www.codeproject.com/Articles/406096/A-beginners-tutorial-for-understanding-Windows)

technology...
If you develop both - client and server - i do not see any reason to use primitive sockets.

All ok. In C++ it was pointer to function, simple 32 bit integer (address in memory), in In .NET it almost the same, but better protected(by name and parameters).
So, event in class is collection (may be null if empty) of "pointers to function".

The first stupid question:
Is the enum (?) PacketDirection defined only once? Sometimes in big projects simple things could be duplicated, and so, in run time it will not be same type.

Tss! He probably will be our boss in short time (after finishing the college)... :-)))))

No, this is not exact solution, it returns array of spaces, but needed result is array of integers, counting spaces between worlds.
Topicaster is making kind of text analyse... :-)

Topicaster wants int [] as result. Do know how to do it with Linq? :-)

You can call the "setButtons(Form f)" from any place, but you should send as parameter correct form. This is the point. In my example, I send "this" from form constructor, so it sure will be correct object.

I call setButtons(Form f) from constructor of form:


public partial class Form2 : Form
{

public Form2(object dataToShow)
{
InitializeComponent();
//dataGridView1.DataSource = dataToShow;
setButtons(this);
}


public static void setButtons(Form f)
{
foreach (Control c in f.Controls)
{
Button btn = c as Button;

if (c == btn)
{
btn.Click += btn_Click;
}
}
}

static void btn_Click(object sender, EventArgs e)
{
System.Media.SystemSounds.Beep.Play();
}


}

Do you understand what is event in .NET?

Are "StartingDate" and "EndingDate" having datetime format in SQL?

Pass the reference of main form to child (in constructor).
Than, you can in child form call any public method of main form - .Show() as example.

Seems like R.id.fragment is not "TopSectionFragment" (And cannot be cast to it, because it is not derived class) Could you change the type of element? Try to replace it with correct control...

Try to use panel1.Controls.Clear();
Main form should not be created again, it exist, and keeps the panel1 .
So, remove from panel1 all added previously, and you will return to start position.
I hope... :-)

Load image to screen - this is less than 5% of work.
The main problem to create the criteria - how the application know that array of pixels is picture of sheep?
Google is working on this problem a lot of time.
The best way - as suggested above - try to use existing engines.

Why do you use SelectedIndex in first row of code, and than try to use SelectedRows ?

Agree. But this is next step for topicaster - after understanding the OOP. :-)

If you are using WinForm, you can override the constructor of new form like:
public

public partial class Form2 : Form
{
public Form2(DataGridView dataToShow)
{
InitializeComponent();
this.Controls.Add(dataToShow);

}
}

Than you can see somthing fanny with adding following code on button click in Form1:

private void button1_Click(object sender, EventArgs e)
{
Form2 fwWithSameDgvClone = new Form2(this.dataGridView1);
fwWithSameDgvClone.Show();
}


This mean, WinForm controls has own limitations to use on different forms.

But same way you can pass the data to Form2 and bind this data to other DataGridView , existing on Form2.

This is good idea, but if create one more programming language. :-)