simple user control / panel question - C# Discussion Boards

Lilli Alexis6-Oct-05 7:20

6-Oct-05 7:20

I have a List of objects of type Extension. I want to search through the list looking for an Extension e where e.name = ""
How do I do this in the .NET framework? I am confused on the proper syntax.
Thanks,
Lilli

Re: List<T> syntax in C#?

David Stone6-Oct-05 11:42

David Stone

6-Oct-05 11:42

Okay, so you've got a list that looks like this:

List<Extension> myExtensions = new List<Extension>();

Then you'd just iterate over it and find the one where e.name == "".

foreach(Extension e in myExtensions)
{
   if(e.Name == "")
   {
      // Whatever you want to do here
   }
}

Picture a huge catholic cathedral. In it there's many people, including a gregorian monk choir. You know, those who sing beautifully. Then they start singing, in latin, as they always do: "Ad hominem..."
-Jörgen Sigvardsson

-- modified at 17:43 Thursday 6th October, 2005

Re: List<T> syntax in C#?

akyriako787-Oct-05 0:23

akyriako78

7-Oct-05 0:23

Hi, if you like to experiment with some cool new features in C# 2.0 i'd propose the following:

class Extension
{
public string Name;
}

class ExtensionConsumer
{
List<Extension> extensionList = new List<Extension>();
Predicate<Extension> NameIsEmpty = delegate(Extension extension)
{
return extension.Name.Trim() == "";
};

public List<Extension> CheckExtensions()
{
return new List<Extension>(Array.FindAll<Extension>(extensionList.ToArray(), NameIsEmpty));
}
}

Currency Symbol

Dominic Farr6-Oct-05 7:10

Dominic Farr

6-Oct-05 7:10

How can I get the currency symbol from just the ISO 4217 standard 3-letter code.

CAD = $<br />
USD = $<br />
GBP = £<br />
YEN = ¥

I tried creating a RegionInfo by stripping out the first two characters of the 3-letter code but is doesn't work for all cases.

Any ideas?

Re: Currency Symbol

ediazc6-Oct-05 7:37

ediazc

6-Oct-05 7:37

Stripping the first two chars of the code doesn't work because YEN => YE, but the country is JAPAN, code JP, BTW the ISO 4217 code for YEN is JPY, no YEN.

You can use a HashTable, and fill it at start of your application, this way:

HashTable ht = new HashTable();
foreach (CultureInfo ci in CultureInfo.GetCultures( CultureTypes.AllCultures ) )
{
RegionInfo ri = new RegionInfo(ci.LCID);
ht[ri.ISOCurrencySymbol] = ri.CurrencySymbol;
}

Later you access the symbol this way:

string sym = (string) ht[isocode];

Eduardo Diaz

site | english blog | spanish blog

Re: Currency Symbol

Dominic Farr6-Oct-05 8:44

Dominic Farr

6-Oct-05 8:44

thank you

How to do unblock socket server by C#?

rushing6-Oct-05 6:23

rushing

6-Oct-05 6:23

There is many examples about blocking socket server.
However, the unblock examples is too little.
Please give me some hints.
Thanks!

simple user control / panel question

theStorminMormon6-Oct-05 6:03

theStorminMormon

6-Oct-05 6:03

OK, I'm just trying to learn how to use panels. I have a panel "pnlWorkArea" and I have a user control "uctrlNewCostTracker".

I just want to write a button action that will make the user control show up in the panel (the button and the panel are both on frmMain).

This should be easy, right?

The ends can never justify the means. It is the means that determine the ends.

Re: simple user control / panel question

Wjousts6-Oct-05 6:45

Wjousts

6-Oct-05 6:45

Just add the user control to the panels ControlCollection using Panel.Controls.Add

Re: simple user control / panel question

dbetting8-Oct-05 4:07

dbetting

8-Oct-05 4:07

I do this frequently.

UcInfo = new ucInfo(this);         // Instantiate the UC
UcInfo.Parent = pnl01;             // Assign the panel as the UC parent
UcInfo.ShowLookup = false;         // I have preprossing in the UC that I want executed
pnl01.Height = UcInfo.Height + 8;  // In this case, I'm adjusting the size of the parent panel to the hieght of the UC
UcInfo.Dock = DockStyle.Fill;      // Now dock the UC into the panel
pnl01.Dock = DockStyle.Top;        // Position the panel on the form
... // There can be other preprocessing you might need done on the UC.
pnl01.Visible = true;              // Now show the panel

Exporting data from CVS and entering into MSSQL table

hasanali006-Oct-05 6:01

hasanali00

6-Oct-05 6:01

Hi
I have been asked to export data from a cvs file and enter it into MSSQL database table. This export needs to be performed using a webpage. So a person would visit the web page and select a cvs files from his local drive, press a button and export will start.

Now I have no idea how CVS works and how I can take some fields from a CVS file and put them into MSSQL table.

Can anyone guide me how I can achieve this
kind regrads

Re: Exporting data from CVS and entering into MSSQL table

Guffa6-Oct-05 7:43

Guffa

6-Oct-05 7:43

Do you mean CVS (Concurrent Versions System), or CSV (comma separated value)? I assume the later.

There is no official standard at all regarding the format of a csv file.

Here's briefly what I have found out:

Usually it's not comma separated at all, but semicolon separated. Each data line ends with a line break, but you can't read the data line by line, as the data may also contain line breaks. The first line may or may not be column headers, and there is nothing in the file that clearly tells if it does. If data contains semicolons, quotes or line breaks, it's surrounded by quotes. Quotes inside data is written as double quotes.

You will probably want to ask for an example file to examine.

If you have MS Excel, put text in some cells, containing quotes, semicolons and line breaks. Export it as a csv file, and you have a test file with all the tricky parts of the format. You might also notice that the format that Excel exports doesn't always contain the same number of columns on all the lines.

---
b { font-weight: normal; }

Re: Exporting data from CVS and entering into MSSQL table

hasanali006-Oct-05 23:23

hasanali00

6-Oct-05 23:23

damnnnnn...I got my post wrong.

Ies, meant to say CSV and not CVS

Reflection onto Assemblies with dependencies

MrEyes6-Oct-05 5:56

MrEyes

6-Oct-05 5:56

I have an assembly that is in the GAC which is using Reflection code to call a second assembly located elsewhere.

This second assembly has various dependencies, and for various reasons I dont want to GAC it or any of its dependencies.

The problem I am having is that while I can load the second assembly fine (by providing the full path to the Assembly.LoadFile(...) function, when I Invoke one of its functions I get a exception indicating that one of the dependencies cannot be found.

Is there anyway I can solves this problem without adding the second assemblies and its dependencies to the GAC??

I think the key here is the intellisense comment on the Assembly.LoadFile(...) function :

"..loading the assembly into the domain of the caller..."

Considering that the reflection code is called from an assembly in the GAC, does this mean that a virtual copy of the loaded assembly is placed into the GAC directories behind the calling assembly

Re: Reflection onto Assemblies with dependencies

Tom Larsen6-Oct-05 8:47

Tom Larsen

6-Oct-05 8:47

Reading the documentation is always wonderful. Smile | :)

I would recommend rereading the MSDN entry on the Assembly object. From the docs:

Do not use LoadFile to load assemblies that you want to execute. LoadFile does not load files into the LoadFrom context, and does not resolve dependencies using the load path, as the LoadFrom method does.

LoadFile is strictly used to inspect an assembly on a file system. This is handy when you want to "look" but not actually run anything in an assembly. It does not load dependancies or do any other checking and hence is unreliable for execution.

dataset

amin saffari6-Oct-05 5:12

amin saffari

6-Oct-05 5:12

1)how can i copy all element of 1 dataset to another dataset

2)i have an datagride in my form and it's a virtual dataset , how can i update it Confused | :confused:

P/Invoke

Member 18186146-Oct-05 3:54

Member 1818614

6-Oct-05 3:54

Hello,
could anybody help me, please?

How do I do the P/Invoke of the following function (from TTNCom.lib of TomTom SDK)?

static INT GetSdkVersionInfoV01(TNavVersionInfoV01& aVersionInfo);<br />
<br />
struct TNavVersionInfoV01<br />
{<br />
  char iVersion[16];<br />
  INT  iBuildNumber;<br />
};

I've tried:

[DllImport("TTNCom.dll", EntryPoint = "?GetNavigatorVersionInfoV01@CTomTomNavigatorCom@@SGHAAUTNavVersionInfoV01@1@@Z")]<br />
extern static int GetNavigatorVersionInfoV01(ref TNavVersionInfoV01 aVersionInfo);<br />
<br />
public struct TNavVersionInfoV01 <br />
{<br />
  char[] iVersion;<br />
  int iBuildNumber;<br />
}

but when calling it like:

TNavVersionInfoV01 nv = new TNavVersionInfoV01();<br />
<br />
int ShowTT = GetNavigatorVersionInfoV01(ref nv);

I get System.NotSupportedException.

There must be some problem with marshalling of types ... Confused | :confused:

Thanks anyway,

Honic

Re: P/Invoke

mav.northwind6-Oct-05 20:28

mav.northwind

6-Oct-05 20:28

Hi!
Besides the fact that I don't know if your EntryPoint is correct (does it work if you leave out the EntryPoint parameter altogether?), you'll have to specify the size of iVersion for marshalling.
Right now you're just saying it's an array of char (without any size given), but the original declaration says it's a char[6].

Try this struct declaration:

public struct TNavVersionInfoV01
{
  [MarshalAs( UnmanagedType.ByValArray, SizeConst=6 )]
  char[] iVersion;
  int iBuildNumber;
}

Regards,
mav

Re: P/Invoke

Member 18186146-Oct-05 21:50

Member 1818614

6-Oct-05 21:50

Hi,
the EntryPoint is correct, there is no problem. But I forgot to mention that it should work under Compact Framework and I'm affraid MarshalAs is not supported there.

Regards.

How do I invoke or call the insert table dialog

Agyeman6-Oct-05 3:48

Agyeman

6-Oct-05 3:48

I have a right text box and i want to be able to insert a table and bullets into it. How ever i need to invoke the insert table dialog. Can any one please help me? And also ideas on how to invoke the bullets too.
thanks.

Nana

Parser replacement target to Dot Net platform

Member 23353326-Oct-05 3:44

Member 2335332

6-Oct-05 3:44

We have a voice xml interpreter that uses Xerces parser. The interpreter is developed in pure C++ using Visual C++. We wanted to replace the xerces parser with MSXML parser. We are also planning to recompile the vxml interpreter in the Dot Net platform. I have a couple of questions in this regard.

Question 1: If I choose the latest Dot Net platform that is "Visual Studio Dot Net 2003", what version of msxml parser does it support. What additional measures should I keep in mind when I replace xerces parser with msxml parser and recompile the whole vxml interpreter in the .Net platform?
Note that we dont want to change our interpreter code while shipping it in the Dot Net platform. Isthat possible?

Question 2: What will be the main effort area for replacing the xerces parser with the msxml parser.
Currently we are using SAX techinique, assume that we will also use SAX technique for the msxml parser.

S. Roy

Re: Parser replacement target to Dot Net platform

David Stone6-Oct-05 12:12

David Stone

6-Oct-05 12:12

This should probably have gone in the C++/CLI forum...but I'll answer it here.

Is there a reason that you want to use the MSXML parser? If you're compiling for .NET, then you may want to switch the parser to using the .NET Framework's System.Xml namespace. The System.Xml.XmlNodeReader or XmlTextReader objects will give you a SAX interface to the Xml that you've got. Or you could try the DOM interface with the XmlDocument object.

And no, your interpreter code doesn't need to be changed. You'll want to investigate Mixed Mode assemblies. This will enable you to run part of your code as MSIL on the .NET runtime and part of it in unmanaged/native mode.

The hardest part is just going to be getting used to the .NET platform. And maybe the funky syntax for the MC++ code.

SendMessage return value

status()6-Oct-05 3:24

status()

6-Oct-05 3:24

Hello,

i'm using SendMessage winapi function in my program like this:

<br />
[DllImport("user32.dll", SetLastError=true, EntryPoint="SendMessage", CharSet=CharSet.Auto)]<br />
public static extern IntPtr SendMessage(<br />
			IntPtr hWnd, <br />
			[MarshalAs(UnmanagedType.U4)] int Msg, <br />
			long wParam, <br />
			int lParam);<br />

So i'm executing it and i want to use the returned value. But it seems that the returned value is a pointer. How can i get the value?

The code is like this:

<br />
IntPtr hWnd = FindWindow("Winamp v1.x", null);<br />
IntPtr lResult = SendMessage(hWnd, WM_WA_IPC, 0, IPC_GETEQDATA);<br />

-- modified at 9:38 Thursday 6th October, 2005

Re: SendMessage return value

status()6-Oct-05 3:50

status()

6-Oct-05 3:50

Hmm, may be the problem isn't in the returned type. But when i try this code in c++ it is working and the return value is correct, but in .NET i'm always receiving 20496

Re: SendMessage return value

status()6-Oct-05 4:19

status()

6-Oct-05 4:19

I found my problem. It is in the SendMessage declaration. The parameters should be IntPtr instead long and int:

<br />
[DllImport("user32.dll", SetLastError=true, EntryPoint="SendMessage", CharSet = CharSet.Auto)]<br />
		public static extern IntPtr SendMessage(<br />
			IntPtr hWnd,  <br />
			[MarshalAs(UnmanagedType.U4)] int Msg,<br />
			IntPtr wParam,<br />
			IntPtr lParam);<br />

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