C# Discussion Boards - CodeProject

Re: Marshaling between managed and unmanaged [modified]

akhanal29-Sep-09 5:02

akhanal

29-Sep-09 5:02

Here is the modified code for the function that calls func1(getList()) and other functions from the dll:

void listTheMembers(unsigned __int16 ID1, unsigned __int16 ID2) 
{
    unsigned __int16* arg3;
    int i;
    unsigned int test;

    printf("\nMembers in list %d on server %d:\n", ID2, ID1);

    /* This gets array of Members */
    if((test = getList(ID1, ID2, &arg3)) != 0) 
    {  
        printf("Error getting member list for %d: %d\n", ID2, test);
        return;
    }

    if(!arg3[0]) {
        printf("No members\n\n");
        freeTheAllocatedMemory(arg3);
        return;
    }
    for(i=0; arg3[i]; i++) 
    {
        char* nameOfMember;
        
        /* This queries member's username... */   
        if((test = getName(ID1, arg3[i], Member_Username, &nameOfMember)) != 0)  
        {    
            printf("There was an error in querying member's username: %d\n", test);
            break;
        }
        
        printf("%u - %s \n", arg3[i], nameOfMember));
        freeTheAllocatedMemory(nameOfMember);
    }
    printf("\n");

    freeTheAllocatedMemory(arg3);  /* This releases the array */
}

The signatures for the called functions are:

unsigned int getList(unsigned __int16 ID1, unsigned __int16 ID2, unsigned __int16** result);
unsigned int freeTheAllocatedMemory(void* ptr);
unsigned int getName(unsigned __int16 ID1, unsigned __int16 MemberID, size_t flag, int* MemberName);

No. Some articles yes. And I am in the middle of writing my own.

That's great, it will be awesome to read one. Smile | :)

modified on Tuesday, September 29, 2009 11:11 AM

Re: Marshaling between managed and unmanaged

Luc Pattyn29-Sep-09 5:36

Luc Pattyn

29-Sep-09 5:36

seeing the real function name, and example code using it, I now know the native function is allocating an array and setting its pointer through arg3 (which you later must free again). So you don't need any fixed nor GCHandle and this code of yours[^] should be pretty close. However your int [] managedArray = new int[1] is still wrong, they are 16-bit numbers, so use short!

Check again in the way I indicated here[^].

When in doubt, compare results for a native caller and your managed caller.

Smile | :)

Luc Pattyn

Local announcement (Antwerp region): Lange Wapper? Neen!

Re: Marshaling between managed and unmanaged

akhanal29-Sep-09 5:32

akhanal

29-Sep-09 5:32

I am receiving following values in the index 0 of the array, and index 1 is always 0:

It looks like address values.

Re: Marshaling between managed and unmanaged

Luc Pattyn29-Sep-09 5:37

Luc Pattyn

29-Sep-09 5:37

That most probably isn't hex as I see 9 digits (for a 16-bit number???); it takes hex to get maximum probability of seeing a pattern if there is one.

Smile | :)

Luc Pattyn

Local announcement (Antwerp region): Lange Wapper? Neen!

Re: Marshaling between managed and unmanaged [modified]

akhanal29-Sep-09 6:01

akhanal

29-Sep-09 6:01

This is the actual value and its hex equivalent for the 0th index of the array. I printed these values in a file like this:

System.IO.File.AppendAllText("c:\\projectLog.txt", Array[0].ToString());
System.IO.File.AppendAllText("c:\\projectLog.txt", ":");
System.IO.File.AppendAllText("c:\\projectLog.txt", Array[0].ToString("X8"));
System.IO.File.AppendAllText("c:\\projectLog.txt", Environment.NewLine);


505119136:1E1B81A0
505119552:1E1B8340
505140416:1E1BD4C0
505140432:1E1BD4D0
505140448:1E1BD4E0
505140464:1E1BD4F0
505140480:1E1BD500
505140496:1E1BD510
505140512:1E1BD520
505140528:1E1BD530
505140544:1E1BD540
505140560:1E1BD550

Here is to elaborate (remember I initialized the array[1000] with values 0 to 999):

Index 0: 486734960 : 1D02FC70 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002
Index 0: 486734976 : 1D02FC80 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002
Index 0: 486734992 : 1D02FC90 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002
Index 0: 486735008 : 1D02FCA0 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002
Index 0: 486735024 : 1D02FCB0 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002
Index 0: 486735040 : 1D02FCC0 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002
Index 0: 486735056 : 1D02FCD0 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002
Index 0: 486735072 : 1D02FCE0 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002
Index 0: 486735088 : 1D02FCF0 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002
Index 0: 486735104 : 1D02FD00 , Index 1: 0 : 00000000 , Index 2: 2 : 00000002

modified on Tuesday, September 29, 2009 12:10 PM

Re: Marshaling between managed and unmanaged

Luc Pattyn29-Sep-09 6:15

Luc Pattyn

29-Sep-09 6:15

OK, these clearly are pointers, they are multiples of 16, and ascending.
And your C code needs to pass one of them to get a member name.

You still have lots of details wrong, e.g. pointers cannot be int16, yet you declare arg3 as int16 pointer.

FYI: I retire from this thread; it has taken you till now to not tell what it is about, to provide real function names, and to mostly ignore what I have replied before.

You still have a lot to learn, I suggest you read a couple of books first.

Smile | :)

Luc Pattyn

Local announcement (Antwerp region): Lange Wapper? Neen!

Re: Marshaling between managed and unmanaged

akhanal29-Sep-09 6:27

akhanal

29-Sep-09 6:27

You still have lots of details wrong, e.g. pointers cannot be int16, yet you declare arg3 as int16 pointer.

That is not my code, it is part of a propriety SDK that I received to work with. And I am under obligations not to release the code (might get fired Smile | :)

). And that SDK has the int16 implementation.

I retire from this thread

I am sorry to hear that.

it has taken you till now to not tell what it is about, to provide real function names

Well you now know why.

mostly ignore what I have replied before

That's not true I have used almost all of your suggestions, and learned a lot in the process.

You still have a lot to learn, I suggest you read a couple of books first.

That is very true, that is why I was asking you about the particular book (If you have any suggestions in this regard it will be helpful). Thank you very much for all the time and efforts you have put on this. I appreciate it a lot. Smile | :)

Getting the selected items from a radioButton group

Twyce28-Sep-09 6:42

Twyce

28-Sep-09 6:42

I am trying to get the seleted radioButton from a group of radio buttons.
The program is supposed to check on the database for controls that match the selected radiobuttons. The radiobuttons are named High,Medium,Low.
For example

If a person selects High, the program must go through the database and choose all the controls that are rated High and then must load them into a listBox.

My problem is that the code i am using does not see the selected items and does not load the listBox.
I am usig SQL server database and stored procedures to do this.

Any suggestions on how i can go about doing this will be appreciated.

Re: Getting the selected items from a radioButton group

Michael Eber28-Sep-09 7:04

Michael Eber

28-Sep-09 7:04

Not sure if you are doing this in a web page or in a rich client. In a rich client application it is very easy:

Create your group and put all radio buttons in there.
Bind all buttons to a single event handler.
In the event handler write something like this:
foreach ( RadioButton item in myGroup.Controls)
{
      if ( item.Checked )
      {
         // TODO: Insert your code here
      }
      else
          continue;
}

Now for the not-so-rich-and-pissy web interface you should confirm that all of your radio buttons have AutoPostBack=true and see if that helps your situation.

Crystal Report at User's Computer

Said Ali Jalali28-Sep-09 5:05

Said Ali Jalali

28-Sep-09 5:05

Hi everyOne.
I am useing Crystal Report in my project and its working well in my computer.But when i inistall it on user's Computer befor starting the program a Message(Need the crystall report be installed) is showen.
When i install crystalReport i work.
I do'nt want to install CrystalReport.What should i do?
Thank u .

CanI

Re: Crystal Report at User's Computer

Not Active28-Sep-09 5:12

Not Active

28-Sep-09 5:12

Roya Rayane wrote:
I do'nt want to install CrystalReport.What should i do?

Don't use Crystal Reports. Roll eyes | :rolleyes:

only two letters away from being an asset

Re: Crystal Report at User's Computer

hosseinghazanfary28-Sep-09 6:08

hosseinghazanfary

28-Sep-09 6:08

hi dude,i cant exactly tell u what to do,but i think u should install that version of crystal which is required during setting up ur application.i think u can do it by INSTALLSHIELD ,hope that'll help.
good luck

Re: Crystal Report at User's Computer

Paramhans Dubey29-Sep-09 2:45

Paramhans Dubey

29-Sep-09 2:45

Hi you can add custom prerequisite in your setup application.

Select Row in DataGridView By Using Code (Physically)

Thaer Hamael28-Sep-09 5:02

Thaer Hamael

28-Sep-09 5:02

hi all

i wount To Select Row in DataGridView By Using Code C#
the Selected is Physically .

thanks
Rose | [Rose]

Thaer

Re: Select Row in DataGridView By Using Code (Physically)

Not Active28-Sep-09 5:10

Not Active

28-Sep-09 5:10

Thaer Hamael wrote:
Selected is Physically .

I suppose this would work better than trying to do it mentally, unless your Stephen Hawking.

Have you even tried searching for an answer or do you expect everyone else to do your work for you? This is something that just about any article on DataGridView should cover.

only two letters away from being an asset

Re: Select Row in DataGridView By Using Code (Physically)

Thaer Hamael28-Sep-09 5:20

Thaer Hamael

28-Sep-09 5:20

Thanks Mr
I did not ask to suspend
But asked for help
If you can not help me I would not Alngliq of no benefit

I did not ask for assistance only after the test, Mr.

Thanks
Mad | :mad:

Thaer

Re: Select Row in DataGridView By Using Code (Physically)

MickCurley28-Sep-09 7:20

MickCurley

28-Sep-09 7:20

Take it easy there my friend..

Mark is simply saying you could have googled this, but just to get you started
the functionality you require is hidden away under :

DataGridView.Rows[rowindex].Selected = true;

On another note, people won't help you if your're rude.

Regards
Mick Curley

Smile | :)

Re: Select Row in DataGridView By Using Code (Physically)

Thaer Hamael28-Sep-09 20:48

Thaer Hamael

28-Sep-09 20:48

I'm not rude
I asked and one of them helped me to suspend
The answer obtained by you I know it , but the line chosen not be true only if chose by the mouse

Thanks
Rose | [Rose]

Thaer

Re: Select Row in DataGridView By Using Code (Physically)

bscaer28-Sep-09 5:39

bscaer

28-Sep-09 5:39

Your question did not translate well to English so it may be difficult for anyone to answer.

dllnotfoundexception when compiling release version

tjeffries28-Sep-09 4:50

tjeffries

28-Sep-09 4:50

I have an application written in C# using VS 2005 that calls a C DLL.
Everything has been working fine until recently. A few days ago I sent a
release build to my client and they reported they are getting a
dllnotfoundexception. We worked through some similar issues some time ago and
up until recently the versions I sent out worked just fine.

Dependency walker tells me that WINMM.DLL calls MSVCR80.DLL, and there may
be a version problem. However, even if I put a version of MSVCR80.DLL in the
same directory, I still get the error. Apparently it is coming from the fact
that IESHIMS.DLL and WER.DLL are not on the system. I don't need ANYTHING in
those DLLs- all my DLL does is some mmsystem based wave playback. But that
does not alter the fact that Windows won't run the release version. The debug
version, by the way, runs fine, but only on a system with VS 2005 installed.

I have seen some references to the fact that the latest version of IE got
rid of IESHIMS.DLL and replaced it with something else. However, the
solutions I've seen posted don't seem to help. I'm running on XP (as is my
client) but this will be a commercial product, so we have to support Vista
and W7.

I have seen remarks dating from around 2005 that say certain manifests need
to be built certain ways to avoid this, but I have not figured out what is
involved. I would appreciate any thoughts on finding a solution to this!

Reflection-Typecasting on a SortedList / KeyValuePair

StephenGStone28-Sep-09 4:41

StephenGStone

28-Sep-09 4:41

I would like to take any(unknown types) SortedList and get access to the KeyValuePair data as type object so I can then access the data.
Given
SortedList<string,int> tmp = new SortedList<string,int>();or
SortedList<int,myObj> tmp = new SortedList<int,MyObj>();or
......

I need to be able to do something like
foreach(KeyValuePair<object,object> kv in tmp).......

to get access to the objects then use reflection to determine type and such.

Steve

Re: Reflection-Typecasting on a SortedList / KeyValuePair

Henry Minute28-Sep-09 5:09

Henry Minute

28-Sep-09 5:09

And what is your question?

What have you tried?

Where are you stuck?

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Re: Reflection-Typecasting on a SortedList / KeyValuePair

StephenGStone28-Sep-09 5:58

StephenGStone

28-Sep-09 5:58

How can I typecast an object,which is of type SortedList to a SortedList.

public static string UnknownSortedListToStr(object tmp)
{
string res = "";
object n;
object v;

  // This Line Fails.(Unless the SortedList passed in(tmp) was declared <object,object>)
SortedList<object, object> si = (SortedList<object, object>)tmp;

if ((tmp.GetType().FullName.Contains("System.Collections.Generic.SortedList")) ||
(tmp.GetType().BaseType.FullName.Contains("System.Collections.Generic.SortedList")))
{
for (int i = 0; i < si.Count; i++)
{
string s = "";
n = si.Keys[i];
v = si.Values[i];
if (n != null)
s = n.ToString() + "=";
if (v != null)
s += v.ToString();
res += s + "\r\n";
}
}
else throw new Exception("Not a SortedList");
return res;
}

Steve

Re: Reflection-Typecasting on a SortedList / KeyValuePair

Henry Minute28-Sep-09 10:04

Henry Minute

28-Sep-09 10:04

Take a look at this[^], particularly the last part of the answer from John Grove.

This[^], particularly Example 40, right near the end.

And finally this blog from Brad Abrahams[^].

One thing they all have in common is that they start with the Type of the collection, and get the parameter types from there. Once you have the types of the parameters, you can go practically anywhere.

You might find other useful/interesting stuff by googling something like reflection generic collections which is how I found the above.

Re: Reflection-Typecasting on a SortedList / KeyValuePair

StephenGStone28-Sep-09 12:52

StephenGStone

28-Sep-09 12:52

Sound computer advice browsing the web.
I'd already been to 2 of your links but thanks for the effort. When I find the Solution I will be sure to post it.

Steve

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