C# Discussion Boards - CodeProject

Re: Database problem

Paul Conrad23-Sep-07 6:44

Paul Conrad

23-Sep-07 6:44

You might want to rephrase what you are trying to accomplish.

"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus

RichTextBox

mihksoft17-Sep-07 20:22

mihksoft

17-Sep-07 20:22

Hy
I have a RichTextBox and I typing words separated with SPACE. I want to set different color for each word typed. Can anybody tell me how can I do that or give me an short example.

Thanks

Re: RichTextBox

wienzzz17-Sep-07 22:27

wienzzz

17-Sep-07 22:27

Hai mihk, I'm working on similar application also.

In my opinion, you can do that on 2 ways.
1. scan through the first char loop until end, when you find "SPACE" / "32" in ASCII, you just put a little code of RTF Formatting. well, let's just say like this.

<br />
StringResult = "";<br />
//this is the header for RTF-format<br />
StringResult = {\rtf\ansi {\colortbl; \red0\green0\blue255;\red255\green0\blue0;}; <br />
//2 color, Blue and Red<br />
bool toggle = false;<br />
for(int i=0; i < YourString.GetLength(0); i++)<br />
{<br />
    if(toggle)<br />
    {<br />
        StringResult = StringResult + @"\cf1";<br />
    }<br />
    else<br />
        StringResult = StringResult + @"\cf2";<br />
<br />
    StringResult = StringResult + YourString[i];<br />
<br />
    if(YourString[i] == (char)32)<br />
    {<br />
    //toggle the boolean <br />
       if(toggle) toggle = false;<br />
       else toggle = true;<br />
    }<br />
}<br />

you may search more about RTF formatting on microsoft web site.

2. you can just use the method RTB.Selection to change the font, forecolor, backcolor, etc. find more info about this on MSDN help.

CMIIW

How Yahoo messenger photo sharing works

Lilupa17-Sep-07 20:20

Lilupa

17-Sep-07 20:20

I want to know how Yahoo messenger photo sharing works. Is it using byte streaming by using a web service? I want to develop that kind of application using C# or C++. So please help me to find some articles or sample source codes.

Regards,
Lilupa Karunarathne.

Getting a variant containing safe array of Double Values from MFC ActiveX in C#?

ss43117-Sep-07 20:11

ss431

17-Sep-07 20:11

Hi All,

I have a MFC ActiveX control which has a method which returns a variant which
contains a safe array of double values .

void Calculate(double value,VARIANT *Result);

"Result" variable is of "Out" type.
When i'm trying to access this function from C# i'm by passing variable of type "Object" i'm getting RunTime Exception as follows

"An unhandled exception of ype 'System.Runtime.InteropServices.COMException' occurred in mscorlib.dll
Additional information: Type mismatch. (Exception from HRESULT: 0x80020005 (DISP_E_TYPEMISMATCH))"

Please Anyone help me to solve this problem
I can access this from VB 6 without any issues.

Thanks in Advance

Re: Getting a variant containing safe array of Double Values from MFC ActiveX in C#?

Nissim Salomon18-Sep-07 1:40

Nissim Salomon

18-Sep-07 1:40

Hi
Can you supply the IDL of the Interface that contain the method you are trying to invoke ???

Re: Getting a variant containing safe array of Double Values from MFC ActiveX in C#?

ss43118-Sep-07 19:30

ss431

18-Sep-07 19:30

Hi nissims

Thanks for your reply,
Below is the IDL for my MFC ActiveX Control

library MyActiveXLib
{
importlib(STDOLE_TLB);

// Primary dispatch interface for CMyActiveXCtrl

[ uuid(9117C567-1EAD-48B3-BA9E-C4D44852D181),
helpstring("Dispatch interface for MyActiveX Control")]
dispinterface _DMyActiveX
{
properties:

methods:

[id(1), helpstring("method AddDataPoint")] void AddDataPoint(LONG lngIdx, DOUBLE dblXVal, DOUBLE dblYVal);
[id(2), helpstring("method AddDataPoints")] void AddDataPoints( LONG lngNoOfPoints, VARIANT varXVals, VARIANT varYVals);

[id(3), helpstring("method GetData")] LONG Calculate( DOUBLE dblXVal, VARIANT* varResult);

};

// Event dispatch interface for CMyActiveXCtrl

[ uuid(07A82910-34BC-43C2-ADAE-A462286D4E10),
helpstring("Event interface for MyActiveX Control") ]

dispinterface _DMyActiveXEvents
{
properties:
// Event interface has no properties

methods:

};

// Class information for CMyActiveXCtrl

[ uuid(E98E4ED3-C038-4705-8EAB-43AD8A1B75AB),
helpstring("MyActiveX Control"), control ]

coclass MyActiveX
{
[default] dispinterface _DMyActiveX;
[default, source] dispinterface _DMyActiveXEvents;
};
};
"varResult" variable of "Calculate" method will return the SafeArray of Double values.
Please suggest me the solution to solve this problem

Thanks again

Re: Getting a variant containing safe array of Double Values from MFC ActiveX in C#?

Nissim Salomon20-Sep-07 13:54

Nissim Salomon

20-Sep-07 13:54

Hi Sorry about the delay, i just saw your answer now.
Are you passing an object argument that encapsulate a double array ???

For example: 
object result = new double[10];

Re: Getting a variant containing safe array of Double Values from MFC ActiveX in C#?

venkyhyd5-Oct-08 20:14

venkyhyd

5-Oct-08 20:14

any suggestions on the similar issue posted
http://www.codeproject.com/script/Forums/View.aspx?fid=1649&msg=2752382[^] Confused | :confused:

Where can call reports in layers "tier"

Rami Said Abd Alhalim17-Sep-07 19:57

Rami Said Abd Alhalim

17-Sep-07 19:57

i want add reports to my project, my project contain 3 layers (1- presentation layer 2-Business Logic layer 3-Data Access layer )

check to see if a specified file exist in a specified directory

pavya_Cool17-Sep-07 19:19

pavya_Cool

17-Sep-07 19:19

Hi to all,

I want to check the specified file exist in the specified directory or not....

how can i do this?

Pravin

Re: check to see if a specified file exist in a specified directory

Kuldeep Antil17-Sep-07 19:51

Kuldeep Antil

17-Sep-07 19:51

create the instance of FileInfo class

//FileInfo f;
initialze that in the following manner

//f = new FileInfo("something.txt");///mention the complete path

and then use this property to know whether this file exists or not

///if(f.Exists == false) /// means the file doesn't exist

ok

Re: check to see if a specified file exist in a specified directory

pavya_Cool17-Sep-07 19:54

pavya_Cool

17-Sep-07 19:54

Thanks Kuldeep

Pravin

Re: check to see if a specified file exist in a specified directory

Nissim Salomon17-Sep-07 20:18

Nissim Salomon

17-Sep-07 20:18

Hi
In order to check if a specific file exists
You can use the File.Exists static method , you can also use the
FileInfo.Exists property but for that you need to construct a FileInfo Object

Re: check to see if a specified file exist in a specified directory

pavya_Cool17-Sep-07 20:21

pavya_Cool

17-Sep-07 20:21

Thanks Nissims,

i have used here object.FileExists(filespec) method.

Pravin

Re: check to see if a specified file exist in a specified directory

ramdil20-Sep-07 1:10

ramdil

20-Sep-07 1:10

You can directly check the path using
if(System.IO.File.Exists(Path))

Regards
DilipRam

SQL Joins

iet200017-Sep-07 19:09

iet2000

17-Sep-07 19:09

Hi Everybody,
We have a problem in displaying the data combining two tables....

we have table1 where a primary key is set to field1 and another table table2 where a foreign key is set to field1 with the same name as it is in the table1.

we gave the query to the data adapter as
" SELECT field1,field2,field3 FROM table2,table1 WHERE table1.field1=table2.field1";

But all the table2 rows are displayed without satisfying the condition we gave in the sql query.

Please help us at the earliest.

Thanks and Regards,

Priya

Re: SQL Joins

Rami Said Abd Alhalim17-Sep-07 19:50

Rami Said Abd Alhalim

17-Sep-07 19:50

SELECT table1.field1,table1.field2,table1.field3
FROM table1 inner join table2 on table1.field1=table2.field1

Rami Abdalhalim

Re: SQL Joins

iet200017-Sep-07 20:33

iet2000

17-Sep-07 20:33

Thanks ..... It Worked....

But the filtered row is repeatedly getting displayed in the output table.....
We want the row to be displayed only once....

Please suggest..

Priya

Virtual Function

.NET- India 17-Sep-07 18:57

.NET- India

17-Sep-07 18:57

Hello Everyone,

Can anybody let me know "Wht's the benefits of the Virutal function in C#"

Re: Virtual Function

Nouman Bhatti17-Sep-07 18:59

Nouman Bhatti

17-Sep-07 18:59

To get polymorphic behavior.

Re: Virtual Function

.NET- India 17-Sep-07 19:02

.NET- India

17-Sep-07 19:02

Can u explain it further.....................

Re: Virtual Function

lmoelleb17-Sep-07 20:38

lmoelleb

17-Sep-07 20:38

Given your question I suspect object oriented programming is new to you. A forum really isn't ideal for learning a topic as large as OO from scratch. I recommend getting a book or spend a lot of time researching on the internet (google is your friend). You can for example read wikipedia for a VERY broad overview:

Object Oriented programming on Wikipedia[^]

If you have specific questions not easily answered by googling, then it is time to ask in the forum.

Re: Virtual Function

Scott Dorman20-Sep-07 5:10

Scott Dorman

20-Sep-07 5:10

By marking the function as virtual you are indicating that it is legal for a derived class to "overload" that function and change the behavior, either completely or partially.

This concept is generally called polymorphism and is one of the central concepts in object oriented programming. There are several good websites and reference books that explain OO programming theory, so you might want to check those out and get in order to get a better understanding.

Scott.

—In just two days, tomorrow will be yesterday.

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License Key Generation

M. J. Jaya Chitra17-Sep-07 18:56

M. J. Jaya Chitra

17-Sep-07 18:56

Hai Everbody,

Warm Greetings!

Can any one suggest me the techniques and methods for license key generation.

Also how can i identify a system uniquely using the hardware information such as Processor ID and MAC Address.

And how can I get the Processor ID.

Best Regards,
M. J. Jaya Chitra

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