C# Discussion Boards - CodeProject

asamay22-Sep-06 9:30

22-Sep-06 9:30

thanks, its not a pure P2P application as u told, there is a discovery server for authorizing and locating sharing file list and some permissions about them.
i found an article about P2P programming with .NET technologies,
here it is

http://msdn.microsoft.com/msdnmag/issues/01/02/netpeers/default.aspx

it will be very useful for developing P2P app with .NET

thanks again.

asamay

Typed DataSets

eggsovereasy21-Sep-06 10:05

eggsovereasy

21-Sep-06 10:05

Obviously I'm doing something wrong, or typed datasets are the most worthless invention ever because they never work.

1). I constantly get Original_ appended to parameters. Why would I ever need an update to look like this: Update(string title, string otherData, int Original_id, int id) when the id column is a PK and an identity column?

2). "...could not find a non-generic method 'Update' that has parameters:...". So, if just let the DS make all its own methods, then create a new ObjectDataSource with this DataSet as its DataObject the Update method VS generated BY ITSELF is not good enough?! Whats the point of it automatically generating the Insert, Update, and Delete methods if you need to write all sorts of code just for them to work properly?

I got tired of having to write a sort and paging method for every stupid GridView in the project, but its way easier than this.

Problem: Form Controls ghost when form moves [modified]

Alaric_21-Sep-06 9:02

Alaric_

21-Sep-06 9:02

Hi. I'm building a custom shaped form and I'm having a problem with flickering whenever I move the form. The issue is that the form itself does not flicker, but the controls on the form still do. I use the following code to execute movement of the form(in my MouseMove event handler):

if(e.Button == MouseButtons.Left)
{
     if(!mouseOutOfBounds)
       {
          if(newMouseDrag)
            {
             mousePt = new Point(e.X, e.Y);
             newMouseDrag = false;
            }
          else
            {
             if(!blockProcessing)
               {
                this.Location = new Point(this.Location.X + e.X - mousePt.X,
                                          this.Location.Y + e.Y - mousePt.Y);
               }
                blockProcessing = !blockProcessing;
            }

       }
}
else
{
   newMouseDrag = true;
}

Whenever I disable the visibility of all of the controls on the form, everything works fine, and if I enable the visibility of one button, there isn't much degradation in performance. But, whenever I have all of them visible, the redraw of the controls ghosts, and the bitmap that I have displayed in a picturebox flickers as it rasterizes itself. Does anyone know of a way to fix this problem?

-- modified at 18:05 Thursday 21st September, 2006

Re: Problem: Form Controls ghost when form moves

Nader Elshehabi21-Sep-06 19:46

Nader Elshehabi

21-Sep-06 19:46

Hello

Your problem is that your controls are not double buffered. Use class BufferedGraphics to customly draw your controls using a buffer before displaying it to eleminate that flicker.

Regards

Re: Problem: Form Controls ghost when form moves

Alaric_22-Sep-06 5:42

Alaric_

22-Sep-06 5:42

Yeah, I knew that the graphics needed to be rendered to a backbuffer, but I couldn't find anything in the MSDN to facilitate it in C#. ...I'm using 1.1, not 2.0

Re: Problem: Form Controls ghost when form moves

Nader Elshehabi22-Sep-06 8:50

Nader Elshehabi

22-Sep-06 8:50

Simple!! Download .Net 2.0, Install it on your machine. Then reference to the appropriate dlls -System.Windows.Forms.dll for example- on the .Net 2.0 folder explicitly instead of the default.

Regards

C# Objects Using XML File

Cubzfan21-Sep-06 8:46

Cubzfan

21-Sep-06 8:46

Hi All,

I'm new to C# and XML. I could use a little advice on how best to approach my latest task. I'm using MS Visual Studio and need to setup a class which will consist of objects which will represent sub-control's (combo box, list box, etc).Class will be made up of a couple of strings and a couple of array of strings.

What would be best concerning XML, should I use elements or attributes? Which XML reader/parser would be best? Which method would be best for mapping XML input to a C# object?

Does anybody have a link to code where this is being done? I've found a lot of info on saving C# objects to XML but i'm trying to go the other way.

Thanx,

Tom

Re: C# Objects Using XML File

Le centriste21-Sep-06 9:06

Le centriste

21-Sep-06 9:06

You may want to start by reading this[^].

--------

"I say no to drugs, but they don't listen."
- Marilyn Manson

Help me in save values in app.config and retrieve it .

hdv21221-Sep-06 8:32

hdv212

21-Sep-06 8:32

Hi
when i add key and value into app.config from my app by following code ;
System.Configuration.ConfigurationSettings.AppSettings.Add("Color", "Red");
the following error shown me :
The configuration is read only.
how to solve my problem ?

Re: Help me in save values in app.config and retrieve it .

AndriyZZ21-Sep-06 9:33

AndriyZZ

21-Sep-06 9:33

Hello

//-------------------------------------
using System.Configuration; //add ref to System.Configuration.dll
//-------------------------------------
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
config.AppSettings.Settings.Add("Color", "Red");
config.Save(ConfigurationSaveMode.Full);
//-------------------------------------

Andriy Zhornyk, with best regards

Re: Help me in save values in app.config and retrieve it .

hdv21221-Sep-06 11:47

hdv212

21-Sep-06 11:47

hi thanks
but Configuration does not exist in Configuration namespace (but ConfigurationSettings exist)
can u other way to suggest me ??

Re: Help me in save values in app.config and retrieve it .

AndriyZZ21-Sep-06 12:02

AndriyZZ

21-Sep-06 12:02

I'm sorry. I've provided solution for .NET 2.0. You apparently have .NET 1.1. Am I right? As I know only config reading is possible for .NET 1.0 but I can be mistaken. If I'm right you can use xml to work with configuration. Have a luck.

Andriy Zhornyk, with best regards.

Setting the CommandTimeout of a query in VS 05

Ami Bar21-Sep-06 8:25

Ami Bar

21-Sep-06 8:25

Hi,

I created a dataset with the designer of the VS 05 and added a query into it.
I found out that this query takes some time on slow computers and I want to make the CommandTimeout larger.
I checked the properties of the query and I can change several parameters like the CommandText and the CommandType, but the CommandTimeout is missing.

I don't want to change the CommandTimeout within the code generated by the designer, because it will be deleted each time I update the scheme.

So how can I do this without changing the designer's code?

I thought about using partial class, but I don't have an idea of how to do this.

Ami

how to keep the menubar form scrolling in vs 2005

needtoknowC#21-Sep-06 7:21

needtoknowC#

21-Sep-06 7:21

Hi, I am creating forms that use a menubar (file-save,print, etc.). In visual studios 2003 I could keep the menubar from scrolling by selecting true in the locked property field. I 2005 I even though I lock it for some reason it still scrolls with the form.

Do you know a way to keep the menubar from scrolling with the form in vs 2005

Thanks

How I can get the text from x,y coordinates?

Marco225021-Sep-06 7:08

Marco2250

21-Sep-06 7:08

Hi all.

I'd search in the board how an can get text that is at the coordinate x,y (I have a flexgrid on external program and want to get the text of some row/column by its x,y coordinates).

I didn't found nothing. Can someone help me?

Please, help me.

Thx in advance.
Best Regards,
Marco Alves.

MultiSelect With ListBox

ytubis21-Sep-06 6:08

ytubis

21-Sep-06 6:08

Hi guys!
I have drag and drop with 2 ListBoxes.
Now i need to chage them to Multi Select mode.
How can i do it, and what i need to add in the code for it?

Re: MultiSelect With ListBox

Ed.Poore21-Sep-06 6:13

Ed.Poore

21-Sep-06 6:13

ytubis wrote:
How can i do it

By writing code

ytubis wrote:
what i need to add in the code for it?

A brain & some time to think

As of how to accomplish that have you ever tried Google?

Failing that try Badger | [badger,badger,badger,badger...]

Re: MultiSelect With ListBox

ytubis21-Sep-06 6:22

ytubis

21-Sep-06 6:22

Yes I tried and i always get the VB examples and not the C#

Re: MultiSelect With ListBox

Ed.Poore21-Sep-06 6:36

Ed.Poore

21-Sep-06 6:36

What exactly is your problem? The whole concept or a particular bug?

As of how to accomplish that have you ever tried Google?

Failing that try Badger | [badger,badger,badger,badger...]

Re: MultiSelect With ListBox

Eric Dahlvang21-Sep-06 8:23

Eric Dahlvang

21-Sep-06 8:23

Change the SelectionMode to one of the following:

SelectionMode.MultiExtended;<br />
SelectionMode.MultiSimple;

listBox1.SelectionMode = SelectionMode.MultiExtended;
listBox2.SelectionMode = SelectionMode.MultiExtended;

--EricDV Sig---------
Some problems are so complex that you have to be highly intelligent and well informed just to be undecided about them.
- Laurence J. Peters

Get File Encoding

cecildt21-Sep-06 6:07

cecildt

21-Sep-06 6:07

Hi,

Does anyone know of a way to detect a text file's encoding (ANSI, UTF8, UTF7)?
So that I can read the text file in a StreamReader with the right Encoding enabled.

thanks

Re: Get File Encoding

Ed.Poore21-Sep-06 6:37

Ed.Poore

21-Sep-06 6:37

It should automagically do it for you, just use a constructor which doesn't accept an Encoding value.

As of how to accomplish that have you ever tried Google?

Failing that try Badger | [badger,badger,badger,badger...]

ListBox Multi Select

ytubis21-Sep-06 6:02

ytubis

21-Sep-06 6:02

Hi All!
I have 2 ListBoxes that i drag and drop with them from each other.
Now i need to chage them to Multi Select mode.
How can i do it, and what i need to add in the code for it?

Re: ListBox Multi Select

Syed Mujtaba Hassan22-Sep-06 23:15

Syed Mujtaba Hassan

22-Sep-06 23:15

Try using checkboxes in your listbox.

Mujtaba

delete statement in trial version

faladrim21-Sep-06 5:23

faladrim

21-Sep-06 5:23

hi,
im working in a trial version of vs2005
and if i am useing databases, link them with a datagrid using the wizard, it doesn't generate a delete statment, therefor i always get an error when i want to delete and update afterwords.
this is the error:
update requires a valid delete command when passed datarow collection with deleted rows

could this be because of the trial??
plllzzzzz help meeeee

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