C# Discussion Boards - CodeProject

DavidNohejl5-Dec-04 23:47

5-Dec-04 23:47

hi,
yes, try string.Trim(). Parametr can be array of characters you want to get rid of.

MSDN reference: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemstringclasstrimtopic2.asp[^]

best regards,
David 'DNH' Nohejl

Never forget: "Stay kul and happy" (I.A.)

El'Cachubrey6-Dec-04 0:09

El'Cachubrey

6-Dec-04 0:09

Thank

But i didn't wont to enum all unreadable characters in some array, and pass one as parameter to Trim. I just wish to invoke some single function to achive my result.

DavidNohejl6-Dec-04 0:29

6-Dec-04 0:29

String.Trim() is a single function Smile | :)

I doubt there is colection of whitespace - {space}. What does exactly what you want is reading XML with "ignore whitespace" flag. I'll look how it's done there... wait a moment Smile | :)

David

Never forget: "Stay kul and happy" (I.A.)

DavidNohejl6-Dec-04 1:01

6-Dec-04 1:01

hehe this is how they do it! I've found these functions in url parser, I doubt there is common collection or something like that. If you want single function write it by yourself Wink | ;)

ROTOR (Microsoft CLI implemenation) says:

<br />
//<br />
//  in the URL spec, it says that all whitespace should be ignored<br />
//  due to the fact that it is possible to introduce<br />
//  new whitespace and eliminate other whitespace<br />
//  however, we are only going to strip out TAB CR LF<br />
//  because we consider SPACE's to be significant.<br />
//<br />
<br />
PRIVATE inline BOOL IsInsignificantWhite(WCHAR ch)<br />
{<br />
    return (ch == TAB ||<br />
            ch == CR ||<br />
            ch == LF);<br />
}<br />
<br />
#define IsWhite(c)      ((DWORD) (c) > 32 ? FALSE : TRUE)<br />
<br />
PRIVATE void TrimAndStripInsignificantWhite(WCHAR *psz)<br />
{<br />
    ASSERT(psz);<br />
<br />
    if(*psz)<br />
    {<br />
<br />
        LPCWSTR pszSrc = psz;<br />
        LPWSTR pszDest = psz;<br />
        LPWSTR pszLastSpace = NULL;<br />
<br />
        // first trim the front side by just moving the source pointer.<br />
        while(*pszSrc && IsWhite(*pszSrc)) {<br />
            pszSrc++;<br />
        }<br />
<br />
        //<br />
        // Copy the body stripping "insignificant" white spaces.<br />
        // Remember the last white space to trim trailing space later.<br />
        //<br />
        while (*pszSrc)<br />
        {<br />
            if(IsInsignificantWhite(*pszSrc)) {<br />
                pszSrc++;<br />
            } else {<br />
                if (IsWhite(*pszSrc)) {<br />
                    if (pszLastSpace==NULL) {<br />
                        pszLastSpace = pszDest;<br />
                    }<br />
                } else {<br />
                    pszLastSpace = NULL;<br />
                }<br />
<br />
                *pszDest++ = *pszSrc++;<br />
            }<br />
        }<br />
<br />
        // Trim the trailing space<br />
        if (pszLastSpace) {<br />
            *pszLastSpace = L'\0';<br />
        } else {<br />
            *pszDest = L'\0';<br />
        }<br />
<br />
    }<br />
}<br />

David

Never forget: "Stay kul and happy" (I.A.)

How to remove the control box (The 3 buttons of a window at the top right corner) of a MDI Form?

El'Cachubrey6-Dec-04 19:51

El'Cachubrey

6-Dec-04 19:51

Great thank

ting6685-Dec-04 22:43

ting668

5-Dec-04 22:43

Hi~

How to remove the control box (The 3 buttons of a window at the top right corner) of a MDI Form?
I have set the formborderstyle to none. However, when I set the form to be maximized, the control box still in there.

How to remove them? Thanks

Re: How to remove the control box (The 3 buttons of a window at the top right corner) of a MDI Form?

Stefan Troschuetz6-Dec-04 1:11

Stefan Troschuetz

6-Dec-04 1:11

Did you try to set the Form.ControlBox property to false?

www.troschuetz.de

Re: How to remove the control box (The 3 buttons of a window at the top right corner) of a MDI Form?

Stanciu Vlad6-Dec-04 4:35

Stanciu Vlad

6-Dec-04 4:35

Try this three Form class properties ControlBox, MaximizeBox, MinimizeBox, you can hide an show them during run time as you wish Wink | ;)

I hope you understand...
By the way... visit http://nehe.gamedev.net[^]

help! Serializable

chinimimita5-Dec-04 22:34

chinimimita

5-Dec-04 22:34

im doing a remoting program. I'm just wondering why i always get this error message "An unhandled exception of type 'System.Runtime.Serialization.SerializationException' occurred in mscorlib.dll. Additional information: Because of security restrictions, the type clsServiceApp.CallContextString cannot be accessed. " on my second test in the client side.

Here's my code in the server:
public static void Main(string[] Args)
{
HttpChannel channel = new HttpChannel(8080);

ChannelServices.RegisterChannel(channel);

WellKnownServiceTypeEntry WKSTE = new WellKnownServiceTypeEntry(typeof(clsServiceApp.ContextBoundType),"TcpCBOService", WellKnownObjectMode.SingleCall);
RemotingConfiguration.RegisterWellKnownServiceType(WKSTE);

Console.WriteLine("Press enter to stop this process.");
Console.ReadLine();
}
---------------------------------
Here's my code in my middle tier:

public interface IContextBoundType
{
void ConnectToServer();
string SendToServer(string strValue);
}

public class ContextBoundType : ContextBoundObject//, IContextBoundType
{

private DateTime starttime;
private HttpChannel channel;

public ContextBoundType()
{
Console.WriteLine("#Connecting...");
starttime = DateTime.Now;
}

public void ConnectToServer()
{
channel = new HttpChannel();
ChannelServices.RegisterChannel(channel);

WellKnownClientTypeEntry remotetype = new WellKnownClientTypeEntry(typeof(ContextBoundType),"http://localhost:8080/TcpCBOService");
RemotingConfiguration.RegisterWellKnownClientType(remotetype);

// CallContext.SetData("ServerThreadData", new CallContextString(remotetype==null ? "Could not locate server" : "#Done Connecting..."));

}

public void DisConnectFromServer()
{

ChannelServices.UnregisterChannel(channel);

// CallContext.SetData("ServerThreadData", new CallContextString(remotetype==null ? "Could not locate server" : "#Done Connecting..."));

}

~ContextBoundType()
{
Console.WriteLine("ContextBoundType being collected after " + (new TimeSpan(DateTime.Now.Ticks - starttime.Ticks)).ToString() + " seconds.");
}

public DateTime GetServerTime()
{
return DateTime.Now;
}

public string SendMessageToServer(string strValue)
{
CallContext.SetData("ServerThreadData", new CallContextString(strValue));
// Console.WriteLine(strValue);
return strValue;
}

}

[Serializable]
public class CallContextString : ILogicalThreadAffinative
{

String _str ="";

public CallContextString(String str)
{
_str = str;
Console.WriteLine(str);
}

public override String ToString()
{
return _str;
}
}
-------------------------------------
Here's my code in the client side:

private void SendMessageToServer()
{
clsServiceApp.ContextBoundType();

clsServiceApp.ContextBoundType _service1 = new clsServiceApp.ContextBoundType();

lvwStatus.Items.Add("Sending messages to server...");
string s = _service1.SendMessageToServer(txtMessage.Text);
lvwStatus.Items.Add("Server already received message (" + ") <" + s.ToString() + ">");//_service.GetServerTime().ToLongTimeString() +
txtMessage.Text="";
}

private void Form1_Load(object sender, System.EventArgs e)
{
clsServiceApp.ContextBoundType _service = new clsServiceApp.ContextBoundType();
_service.ConnectToServer();
}

-chinimimita-

Save Drawing C#

mathon5-Dec-04 22:20

mathon

5-Dec-04 22:20

hello,

Can anybody explain me here how I can save some drawed rectangles in a jpg or bmp file?

thx

mathon

DavidNohejl6-Dec-04 0:06

6-Dec-04 0:06

hi mathon,
try something like:

<br />
// create new bitnmp<br />
Bitmap bmp = new Bitmap(100,50);<br />
Graphics g = Graphics.FromImage(bmp);<br />
<br />
// some drawing .... <br />
g.DrawString("myText",FontFamily.GenericMonospace,Brushes.Black,0,0);<br />
<br />
// save it as bmp file<br />
bmp.Save("filename.bmp");<br />

best regards,
David 'DNH' Nohejl

Never forget: "Stay kul and happy" (I.A.)

mathon6-Dec-04 3:01

mathon

6-Dec-04 3:01

Hello,

Thank you very much for your reply. Beside the drawed rectangles I have some labels on the form. Is it possible to save also these labels in this bmp file? If yes how does it work?

thx

mat

DavidNohejl6-Dec-04 10:44

6-Dec-04 10:44

mathon wrote:
Beside the drawed rectangles I have some labels on the form. Is it possible to save also these labels in this bmp file?

Don't you want to take a screenshot?
http://www.codeproject.com/csharp/ImageCapture.asp[^]

Never forget: "Stay kul and happy" (I.A.)

mathon6-Dec-04 5:45

mathon

6-Dec-04 5:45

Hello,

I tried it with something like that:

public void DrawStringRectangleF(int a, int b, int c, int d, System.Drawing.Color color, string text)
{
Bitmap bmp = new Bitmap(1400,1000);
Graphics g = Graphics.FromImage(bmp);

System.Drawing.SolidBrush myBrush = new System.Drawing.SolidBrush(color);
System.Drawing.Graphics formGraphics = this.CreateGraphics();
String drawString = text;
// Create font and brush.
Font drawFont = new Font("Verdana", 8);
SolidBrush drawBrush = new SolidBrush(Color.White);
// Create rectangle for drawing.
int x = a;
int y = b;
int width = c;
int height = d;
Rectangle drawRect = new Rectangle( x, y, width, height);
// Draw rectangle to screen.
Pen blackPen = new Pen(Color.Black);
//e.Graphics.DrawRectangle(blackPen, x, y, width, height);
g.FillRectangle(myBrush,drawRect);

GraphicsUnit units = GraphicsUnit.Pixel;
g.DrawString(drawString, drawFont, drawBrush, drawRect);

bmp.Save("filename.bmp");
}

But that does not work. The bmp-file is created but nothing in it. And when I want to open the file, an error occurs that the format is incorrect. Does anbody know what went wrong?? Frown | :(

patrick

DavidNohejl6-Dec-04 10:51

Accessing webform controls in class

6-Dec-04 10:51

hi,
it works fine for me... Confused | :confused:

I did only copy&paste... maybe check input parameters. I've called it with DrawStringRectangleF(0,0,100,100,Color.Red,"Hello");

David

Never forget: "Stay kul and happy" (I.A.)

Nilesh Hapse5-Dec-04 22:09

Nilesh Hapse

5-Dec-04 22:09

hello everybody,

I'm creating a web applocation in ASP.Net using C# as page behind code.
I've one form named WebForm1.aspx and there is a textbox control TextBox1 on it. Then I added a class Class1.cs in the application. There are some functions in the class. Now i want to acces the TextBox1 control of WebForm1.aspx in my class Class1.cs . I think we can not acces Webform controls inside a class. Is there any way to acces the control in the class.

Thanks in advance.

display data in datagrid using the datareader

steve_rm5-Dec-04 19:26

steve_rm

5-Dec-04 19:26

I am trying to display data from a table using the datagrid. This is the code l have used.

cnnOverdueBooks.Open(); <br />
string querySearch = @"SELECT RefNumber, Title, DateOut, DateDue FROM Book WHERE Status = 'On loan' "; <br />
<br />
OleDbCommand cmdDisplayBooks = cnnOverdueBooks.CreateCommand(); <br />
OleDbDataReader drDisplayBooks; <br />
cmdDisplayBooks.CommandType = CommandType.Text; <br />
cmdDisplayBooks.CommandText = querySearch; <br />
drDisplayBooks = cmdDisplayBooks.ExecuteReader(); <br />
grdOverdueBooks.DataSource = drDisplayBooks;

Error message "Complex databinding accepts as a data source either an IList or an IListSource"

Thanks in advance,

Steve

Re: display data in datagrid using the datareader

Daniel Turini5-Dec-04 20:22

How do you map a network drive?

5-Dec-04 20:22

You can only use databinding with datasets, collections and arrays, not with a DataReader (you're using an OleDbDataReader).

Yes, even I am blogging now!

SeanV5-Dec-04 19:25

SeanV

5-Dec-04 19:25

Does any one know how to map a network drive using manage c++/C#?

Re: How do you map a network drive?

Daniel Turini5-Dec-04 20:24

Re: DB and Several Systems

5-Dec-04 20:24

You either call NetUseAdd API using P/Invoke or try to execute a "net use" command from with System.Diagnostic.Process.Start
Note that if you need the error and status codes of the mapping operation (e.g., access denied, etc), you'll need to choose the NetUseAdd API.

Yes, even I am blogging now!

DB and Several Systems

mkomasi5-Dec-04 18:49

mkomasi

5-Dec-04 18:49

Hi,

I have two software system. Each one has a database in SqlServer 2000. One of both have to use another one database and it is better that there was some relation between some tables in two databases. So I think that I must add all tables of first database to second. But DB management will be so difficult because tables of both systems will mixed together.
Can anyone suggest a solution for this problem?

regards,
Mehdi

Daniel Turini5-Dec-04 20:20

Re: Find file status in C#

5-Dec-04 20:20

If the relations are simple (and a small number), then it's better doing things "by hand", and keep the database separated:
1. Create triggers to enforce what would be foreign keys, and to keep data in sync.
2. Create views to ease SELECTs.

Yes, even I am blogging now!

Find file status in C#

mmsspp5-Dec-04 18:48

mmsspp

5-Dec-04 18:48

Hello
I want to check whether the given file is opened by other application such as notepad,paint,word,etc.
How can I do this in C#?
I tried using CFileStatus class. But did not get the exact info.
Can I use WMI?

Daniel Turini5-Dec-04 20:15