Managed C++/CLI Discussion Boards

Re: Display only 2 digs in string in label.

Søren Lyder Nielsen22-Apr-13 22:50

22-Apr-13 22:50

I am sorry... But I aint getting anything out of what is explained in the links.

I tried to use the: label7->Text = String.Format("{0:N} Kr", dansk); as you said.

I just get a lot of errors:
warning C4832: token '.' is illegal after UDT 'System::String'
error C2275:'System::String' : illegal use of this type as an expression
error C2228: left of '.Format' must have class/struct/union

I guess its when I remove the Convert part of the line the problem comes ?

Re: Display only 2 digs in string in label.

Richard MacCutchan22-Apr-13 23:03

Richard MacCutchan

22-Apr-13 23:03

That does not look like C++/CLI code to me; more like C#. I guess you didn't look too closely at the example code[^].

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Re: Display only 2 digs in string in label.

Søren Lyder Nielsen23-Apr-13 0:09

Søren Lyder Nielsen

23-Apr-13 0:09

I am using Microsoft Visual Studio 2010

Re: Display only 2 digs in string in label.

Richard MacCutchan23-Apr-13 1:52

Richard MacCutchan

23-Apr-13 1:52

And what is the relevance of that? You do realise that Visual Studio is a development environment and not a programming language?

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Re: Display only 2 digs in string in label.

Søren Lyder Nielsen23-Apr-13 2:26

Søren Lyder Nielsen

23-Apr-13 2:26

Be cource the errorcodes I got was from MS Visual C++ 2010.
I thought it might explain to you why I got thoose errorcodes in C++.

Its C++ I am Using.

Re: Display only 2 digs in string in label.

Richard MacCutchan23-Apr-13 2:28

Richard MacCutchan

23-Apr-13 2:28

This is the C++/CLI forum; which are you using, C++/CLI or unmanaged C++?

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Re: Display only 2 digs in string in label.

Søren Lyder Nielsen23-Apr-13 2:32

Søren Lyder Nielsen

23-Apr-13 2:32

I have no idea.

Thought I could get some help here ?

Re: Display only 2 digs in string in label.

Richard MacCutchan23-Apr-13 3:55

Richard MacCutchan

23-Apr-13 3:55

Søren Lyder Nielsen wrote:
I have no idea.

Seriously? You are writing a program and you do not know what language or framework you are using? I don't know how you expect us to help if you cannot answer such a basic question. I would suggest you make a decision which language you plan to use and get hold of a book to learn the basics of it before trying anything else.

Use the best guess

Re: Display only 2 digs in string in label.

Søren Lyder Nielsen23-Apr-13 4:42

Søren Lyder Nielsen

23-Apr-13 4:42

Thanks for the help.

But i gotta say, I feel it a is waste of time to try and get anything usefull out of you.

All I ask for, is that you write one line of code with my own data in C++. But instead i feel you blame me for not knowing anything, even though that was one of the first things i told you.

I will try my luck some other time.

Re: Display only 2 digs in string in label.

Richard MacCutchan23-Apr-13 4:49

Richard MacCutchan

23-Apr-13 4:49

Søren Lyder Nielsen wrote:
All I ask for, is that you write one line of code with my own data in C++.

No, you have not asked that, you asked how to get a number formatted in a particular way in C++/CLI, and I referred you to the documentation that explains it in detail, with plenty of samples. It seems you are not prepared to spend the time reading it. You also do not seem to know exactly which language you are using, so I cannot answer the question, because it would be different for each language.

Søren Lyder Nielsen wrote:
But instead i feel you blame me for not knowing anything

Neither did I blame you for anything. I have done my best to help you but I cannot answer the question unless I get the proper facts to start with. As I said before, you need to decide which version of the language you are using and start studying it. Give us the proper facts and background to your problem and we will try to help, but you are expected to do some of the work for yourself.

Use the best guess

Re: Display only 2 digs in string in label.

Member 1000269911-May-13 0:46

Member 10002699

11-May-13 0:46

1 - convert them to float type , example :
{
double a = 2.1589687489;
String^ b = Convert::ToString((float)a);
}

2 - remove them , example :
{
double a = 2.1589687489;
String^ b = Convert::ToString(a);
b = b->remove(b->IndexOf('.')+2 );

}

Re: Display only 2 digs in string in label.

Richard MacCutchan11-May-13 4:10

Richard MacCutchan

11-May-13 4:10

There is no need to do that when you can use format strings to produce the required result in the first place.

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C++ Windows Form Application Printing

eakteam16-Apr-13 10:37

eakteam

16-Apr-13 10:37

this is my code in windows form.... it compiles without error but it prints blank page.... where i done wrong?? please help...

C++

#pragma endregion
        // Declare the PrintDocument object.

    private: System::Void Button1_Click_1(System::Object^  sender, System::EventArgs^  e) {
   PrintDialog1->AllowSomePages = true;

   PrintDialog1->ShowHelp = true;

   PrintDocument ^docToPrint = gcnew PrintDocument;
   PrintDialog1->Document = docToPrint;
   if ( docToPrint == nullptr )
         System::Windows::Forms::MessageBox::Show(  "null" );



   if ( PrintDialog1 == nullptr )
         System::Windows::Forms::MessageBox::Show(  "pnull" );



   System::Windows::Forms::DialogResult result = PrintDialog1->ShowDialog();
   System::Windows::Forms::MessageBox::Show( result.ToString() );



   if ( result == System::Windows::Forms::DialogResult::OK )
   {
       docToPrint->Print();
   }

             }
private: System::Void document_PrintPage_1(System::Object^  sender, System::Drawing::Printing::PrintPageEventArgs^  e) {
   String^ text = "In document_PrintPage method.";
   System::Drawing::Font^ printFont = gcnew System::Drawing::Font( "Times New Roman",20,System::Drawing::FontStyle::Bold );

   e->Graphics->DrawString("EAK TEAM TEST!!!",printFont,Brushes::Black,50,50);
   e->Graphics->DrawString( text, printFont, System::Drawing::Brushes::Black, 10, 10 );
         }

Re: C++ Windows Form Application Printing

NotPolitcallyCorrect16-Apr-13 12:01

NotPolitcallyCorrect

16-Apr-13 12:01

You have already asked this in QA. Please do not cross post.

Re: C++ Windows Form Application Printing

eakteam16-Apr-13 22:55

eakteam

16-Apr-13 22:55

yes .. but i didnt get an answer... and this is very very important to me...

"The more quieter you become, the more you are able to hear..."

Re: C++ Windows Form Application Printing

NotPolitcallyCorrect17-Apr-13 2:42

NotPolitcallyCorrect

17-Apr-13 2:42

eakteam wrote:
very very important to me

So? That is no reason to rudely post this over and over.

Re: C++ Windows Form Application Printing

eakteam17-Apr-13 5:24

eakteam

17-Apr-13 5:24

ok i see ur disturbing... im sorry. nobody born with c++ LANGUAGE knowledge.. u too, like me was amateur....

"The more quieter you become, the more you are able to hear..."

Re: C++ Windows Form Application Printing

NotPolitcallyCorrect18-Apr-13 5:42

NotPolitcallyCorrect

18-Apr-13 5:42

Okaaaaaaaaaaaay what exactly does that have to do with anything? Knowing C++ is not a prerequisite to following the forum posting guidelines or for having some manners.

Re: C++ Windows Form Application Printing

Richard MacCutchan16-Apr-13 21:21

Richard MacCutchan

16-Apr-13 21:21

See http://www.codeproject.com/KB/printing/[^] for samples and articles on printing in .NET.

Use the best guess

Re: C++ Windows Form Application Printing

eakteam16-Apr-13 22:55

eakteam

16-Apr-13 22:55

i dont see any tutorial for c++ windows form???? please help

"The more quieter you become, the more you are able to hear..."

Re: C++ Windows Form Application Printing

Richard MacCutchan17-Apr-13 2:28

Richard MacCutchan

17-Apr-13 2:28

You will have to look at the C# and VB.NET samples and adapt your code from them, as they all use the same .NET framework.

Use the best guess

Re: C++ Windows Form Application Printing

eakteam17-Apr-13 5:24

eakteam

17-Apr-13 5:24

ok i will see harder... thank you

"The more quieter you become, the more you are able to hear..."

I get Input string was not in a correct format. error

Søren Lyder Nielsen15-Apr-13 4:12

Søren Lyder Nielsen

15-Apr-13 4:12

I Get this error, when I write a number in my textBox1, and then erase it again.. Then this popup appers:

An unhandled exception of type 'System.FormatException' occurred in mscorlib.dll
Additional information: Input string was not in a correct format.

Code:

private: System::Void textBox1_TextChanged(System::Object^  sender, System::EventArgs^  e) {
             double tysk, ti, femten, tyve, dansk;
             tysk = System::Convert::ToDouble(textBox1->Text);
             
             dansk = tysk * 7.5;
             ti = tysk * 7.5 * 0.90;
             femten = tysk * 7.5 * 0.85;
             tyve = tysk * 7.5* 0.80;
             
             label7->Text = System::Convert::ToString(dansk);
             label8->Text = System::Convert::ToString(ti);
             label9->Text = System::Convert::ToString(femten);
             label10->Text = System::Convert::ToString(tyve);
         }
};

It also appers when I type a letter in the teksBox1.
Otherwise it workd fine.
Its just a simlpe calculator.

Re: I get Input string was not in a correct format. error

Richard MacCutchan15-Apr-13 4:38

Richard MacCutchan

15-Apr-13 4:38

tysk = System::Convert::ToDouble(textBox1->Text);

This will always throw an exception if the contents of teksBox1 is not a number. You should either catch the exception and deal with it, or use the TryParse[^] method.

Use the best guess

Re: I get Input string was not in a correct format. error

eakteam16-Apr-13 23:35

eakteam

16-Apr-13 23:35

Look this Example .. it will help.

C++

int a= Convert::ToInt32(this->textBox1->Text->Trim());
int b= Convert::ToInt32(this->textBox2->Text->Trim());
int sum=a+b;

"The more quieter you become, the more you are able to hear..."

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