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I'm implementing a background thread that updates the poistion of the Label control on a Form. I was told by Leppie that I was not correctly implementing the ISynchronizeInvoke interface. Can anyone tell me what I'm doing wrong ?
private delegate void ScrollThreadDelegate();
...
...
ScrollThread = new Thread(new ThreadStart(ScrollThreadFunction));
ScrollThread.IsBackground=true;
ScrollThread.Start();
...
private void ScrollThreadFunction()
{
while(RunScrollThread)
{
if(lbSongInfo.InvokeRequired)
{
this.lbSongInfo.Invoke(new ScrollThreadDelegate(this.ShowScrollText));
}
Thread.Sleep(50);
}
}
private void ShowScrollText()
{
if(lbSongInfo.Location==SongInfoEnd)
lbSongInfo.Location=SongInfoStart;
Point CurPos = new Point(lbSongInfo.Location.X,lbSongInfo.Location.Y);
CurPos.Offset(-1,0);
lbSongInfo.Location=CurPos;
}
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Hi people,
I would be the happiest man on Earth if someone tells me how can I change the decimal symbol programmatically. I mean as my program starts i want to parse the strings in a way that the dot is always the decimal symbol no matter what regional settings are set on the PC.
Kamen Boyadjiev
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You could get hold of a copy of a NumberFormatInfo object and modify the NumberDecimalSeparator to the desired character.
NumberFormatInfo nfi = Thread.CurrentThread.CurrentUICulture.NumberFormat.Clone();
nfi.NumberDecimalSeparator = ".";
string myFormattedDouble = myDouble.ToString(nfi); The above assumes the existance of a double called myDouble
Does this help?
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell
Can't manage to P/Invoke that Win32 API in .NET? Why not do interop the wiki way!
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Hi Colin,
thank you for your fast reply. This is really good idea but actually it does not help in my case. Actually I did not expressed my problem quite well. If I have a in a TextBox the string "1.2" I need to parse it as a 1.2 number and the problem is that when I have different decimal symbol not the dot I get quite astonishing numbers, such as for example 1200 by a german language settings due to that the dot is a digit grouping symbol . So my program must not take the german regional setting (if it is set so) but the english(united states) one.
Thank you in advance for any help
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It is not too different from the code I provided above
CultureInfo ci = new CultureInfo("en-US");
NumberFormatInfo nfi = ci.NumberFormat;
double myParsedDouble = myDouble.Parse(txtMyTextBox.Text, nfi);
As the US English Culture already has the correct number format for parsing 1.2 as six fifths rather than 1200 you don't need to create a clone of NumberFormatInfo object and modify it.
Does this help?
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell
Can't manage to P/Invoke that Win32 API in .NET? Why not do interop the wiki way!
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Well Colin that sure would help. Really thank you for that help. Actually quite stupid from me that I have not noticed that to Parse could be passed a CultureInfo too. Really much obliged
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 Opps... Might have helped if I actually read into the System.Globalization namepsace first...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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1)when i use c# How can i take photo from my webcam ?
2)When i use c# What code do i have to write for entering button on the winamp?(For example i open the winamp program from C# and i want to use winamp program after i write the code in the c# i will enter the button it will play.)
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I can't believe I can't make a panel transparent,  I've spent a good couple of hours this morning, if I set the panel to transparent what seems to happen is the panel is drawn with the same color as the form which is ok, but if I have other stuff behind the panel that I want to show throught the panel, then I can't see those controls.
Any help is appretiated.
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You have to set the panel order to background or drop the controls you want to show through in the panel.
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I'm no expert in Oracle, but my first guess would be to remove the colons you put in the parameter names.
cmd.CommandText = "SELECT * FROM USERS WHERE USER_ID = pUserId"
cmd.Parameters.Add( new OracleParameter( "pUserId", OracleType.VarChar )).Value = "[USER_ID]" )
Putting "special" characters in an identifier is just not a good idea in any language.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi@all,
I would like to create a Vu-meter application in C# to display for any sound that goes to the sound card ,but I don't know how
Can anyone help me on how to capture the sound and make the app. work  ?
code? 
Thanx.
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I'm relatively new to C#.
I need to find a way to convert a section of a byte[] to an double or convert to an int if required.
In C++ I would use the algorythms below but I don't know how to express this in a form that c# is happy with.
for an int
BYTE dBytes[4];
int ret = *(int*) dBytes;
for a double
BYTE dBytes[8];
int ret = *(int*) dBytes;
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Check out System.BitConverter.
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Brilliant, Thats exactly what I was looking for.
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hi,
i want to do some device related application using C#(say for eg. TAPI).
Any article or books for this ???
**************************
S r e e j i t h N a i r
**************************
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You're going to have to be alot more specific about what your trying to do.
Define "device related" and what device?
C# and VB.NET are too high level for efficient device driver work...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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The best resource on TAPI and C# is here on GotDotNet[^]
IMO. TAPI and C# aren't a good mix. It just adds an extra layer of complexity. Unless you are well versed with TAPI, I'd say clear of trying to use it through C#.
Michael
CP Blog [^]
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Is it possible to set the location of a main form within the screen to the same position every time the app is started?
The propertie Form.StartPosition seems to make little difference.
I read/write the forms size from the registry, but without controling it's start position it's only half a job.
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Make sure you set the Form.StartPosition equal to FormStartPosition.Manual, then you can specify the Top and Left positions. Persist this value where ever you like (database, XML, config) and set properly at runtime.
- Nick Parker
My Blog | My Articles
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Thanks for the quick reply.
I found the Control.Bounds property and set this in the load event. Seems to work just fine.
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Hello everybody!
My problem is to get/set individual array items which are instanced via reflection.
To give you an overwiew here´s some code:
***************************************************
System.Reflection.Assembly assembly;
assembly = System.Reflection.Assembly.LoadFrom(dllfilename);
foreach(Type assemblyType in assembly.GetTypes())
{
if (assemblyType.IsClass)
objInstance = Activator.CreateInstance(viptype);
foreach(FieldInfo f in objInstance.GetFields(BindingFlags.Public | BindingFlags.Instance))
{
if (f.FieldType.IsArray)
{
// read every array value!
// f.GetValue(objInstance) returns only a complete value (and I don´t know how to handle this)
// How can I access to every array item itself???
}
else
{
// do something different. This is working fine!
}
}
}
*************************************************
And the source from the assembly looks something like that (extremely shortened, but same structure):
************************
public class myClass
{
public int ID;
// Test
public int Test;
// Array
public int array[15];
}
************************
How can I get in the source at the top for example the 10th integer of the array?
Please help me
Norman-Timo
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Norman-Timo wrote:
How can I get in the source at the top for example the 10th integer of the array?
It is reflecting against what was just loaded into memory, there will be no value in the 10th position of the array.
- Nick Parker
My Blog | My Articles
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