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1. GDI has no method of handling a JPEG. Not one.
2. If you tell us what the error is, it would help us to help you
3. What is JpegData ? That is, what is the type of this variable ?
4. Always assume the library has a bug only when you are totally certain your code is calling it correctly, and even then, take care. It's always best to assume the bug is yours, otherwise, it will go unfixed.
Christian Graus - Microsoft MVP - C++
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Hi, thanks for your words,and i know your meaning
maybe my description is not in detail.
Our company using m-jpeg tech to transform jpeg data from Remote device to
client.When i access a standard uri i will get the stream like that:
socket.connect,then i get the stream,
/*
--MYBOUNDARY Content-Type: image/jpeg Content_Length: 3926 Trigger_Flag: 0 ÿØÿçÿÛC , 6') ,@9DC?9>=GPfWGKaM=>YyZaimrsrEU}|ofprnÿÛC4
*/
I use socket to connect the device then get the stream,get the JPEG data
from stream(using jpeg label :ffd8 ffd9),next using Image.FromStream(MemoryStream) method to render the jpeg to screen.
First tiem it worked well,but later, we have many types of devices, some device
I cannot using this method to render JPEG stream.I want to know what happend,
i save Jpeg data to my disk,I fond strange thing happend,all application
using GDIPlus (using Image.FromFile methond cannot open these jpeg files),
,But application ,example IE can open these jpeg file well,
I create a new application(.net1.1) drag a PictureBox to winform using Image property,
when i browse local file and selected the Jpeg file ,click OK,it tell me :
GDI+ general error,but in VB6.0 I drag a PictureBox to the form using the same method to select the Jpeg file it works ok .We have a activex component
writter by Vc++ 6.0 it work ok too.Last i fond all application using GDIPlus
when call Image.FromStream or Image.FromFile will throw GDI+ genner error.
So i cannot using pure C# to completed my work,but by ActiveX(written by vc++
6.0)'s help compled my work.but the Jpeg data producted by hardware( we buy from other company,may be CPU is ARM ) so I cannot do some thing to check
hardware.
Thanks again.
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BlueLoveCyn wrote:
First tiem it worked well,but later, we have many types of devices, some device
I cannot using this method to render JPEG stream.I want to know what happend,
If it stopped working, then the data must have changed. If it still works using IE, then perhaps IE is a bit looser in the jpeg format it accepts ?
Christian Graus - Microsoft MVP - C++
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Can anybody show me how to get the file version using C#
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try this link
click me
deals with the fileversioninfo class
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Can Visual Studio.net create applications that will run on different computers that do not have the visual studio.net compiler?
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Yes, it can. .NET applications only need the the .NET runtime, it's not necessary to have VS .NET.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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If you're asking because you've tried, you can only build applications as you have done, they are reliant on the .NET framework ( as someone said ) and there's nothing you can do about that. The framework is a seperate download, it comes with the compiler.
Christian Graus - Microsoft MVP - C++
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I have a stituation where a method is accessed over remoting which takes a reference to an object as a parameter. But running the client chucks an exception.
The object that I am trying to pass by reference does extend MarshalByRefObject
And below is the exceptions I get:
Unhandled Exception: System.Runtime.Serialization.SerializationException: Because of security restriction
s, the type System.Runtime.Remoting.ObjRef cannot be accessed. ---> System.Security.SecurityException: Re
quest failed.
at System.Security.SecurityRuntime.FrameDescSetHelper(FrameSecurityDescriptor secDesc, PermissionSet d
emandSet, PermissionSet& alteredDemandSet)
at System.Runtime.Serialization.FormatterServices.nativeGetSafeUninitializedObject(RuntimeType type)
at System.Runtime.Serialization.FormatterServices.GetSafeUninitializedObject(Type type)
--- End of inner exception stack trace ---
I don't know if what I am trying to do is even possible. So any advice would be much appreciated.
Cheers
Naren
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Can somebody help me with a regex expressiion that will match all regex keywords (\w, \s, \d, ., ^, |, ?, (), etc...) and escape them?
So, i have a string like this, "\w\s\d.|" and I want it to be like this "\\\\w\\\\s\\\\d\\.\\|". Any ideas?
/\ |_ E X E GG
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Do you really need to replace one slash with four ?
string.replace will probably do this just as easily, I'd have thought.
Christian Graus - Microsoft MVP - C++
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Java does. For example, "\w" already has one slash, I need another to escape it from the regex engine and two more to escape it from javac. Hence, \\\\w==\\w
/\ |_ E X E GG
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You only have to escape the special characters. A pattern like this should do:
"\^$*+?.()[]"
---
b { font-weight: normal; }
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I need \w\s\d {}'s etc... too!
/\ |_ E X E GG
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Hello, my problem is how do draw an grind with GDI+, i need a grid for my furst game so the
object will be able to move in cells. that was my way:
private void GrindPaint(object sender, PaintEventArgs pea)<br />
<br />
{<br />
<br />
Graphics gfx = pea.Graphics;<br />
<br />
int space = 2,cwidth = 10, cheight =10, amount =30;<br />
<br />
Pen pen = new Pen(Color.Black);<br />
<br />
int cx=1,cy=1;<br />
<br />
<br />
for(int j = 0; j<amount; j++)<br />
<br />
{<br />
<br />
cx = 1;<br />
<br />
for(int i =0; i<amount; i++)<br />
<br />
{<br />
<br />
gfx.DrawRectangle(pen,cx,cy,cwidth ,cheight);<br />
<br />
cx = (cx+cwidth+space);<br />
<br />
}<br />
<br />
cy =(cy+cheight+space);<br />
<br />
}<br />
<br />
}<br />
<br />
My question: confused: is , is there another, better way or easier
tnx for help!!
i'm learning
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Personally, I'd just draw lines, not rectangles.
Christian Graus - Microsoft MVP - C++
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I want to have cellspace , so i draw rectangels with distance 2px,...
is my way ok?
 i know stupid questions,... but i started c# and GDI+ 1 weag ago
tnx for all replies
i'm learning
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Your way is fine, if you see a grid, then you got what you want. If it's not drawn over and over, it doesn't matter, but unless you're making less API calls ( you didn't check the box to show <, so I couldn't read all you code ) because of the size of the boxes you draw, I thought lines may be quicker.
Christian Graus - Microsoft MVP - C++
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How can I convert a datatable in MS Access into a comma delimited text file.
thanks.
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If you have Microsoft Access, you can open the database and do an export and choose the save as "text file" option. If you do not have Microsoft Access, then you could write a simple routine to loop the data and write each field value out to a text file.
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Ok, I am trying to retrieve a list of names from the database and based upon the number of rows retrieved from the DB, I am trying to do the following:
1. Instantiate a array of command buttons.
2. Add those command buttons to the list view.
I am assuming step 2 is possible since the item property is a collection of objects, I can add anything I want to add to it. Well it works fine except instead of actual command buttons, I am seeing the following , "System.windows.forms.Buttons, Text="rwqr""
What am i doing wrong.
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What you are trying to do is not directly possible with the listview provided with .NET. The items collection is a collection of data associated with each element in the list, not a collection of controls to be displayed within the list. By default, if no string is supplied when adding items to the collection the objects ToString method is used to get the string to display. This is why you are getting the output you are getting. There are articles here on Code Project that show listview implementations that are capable of docking other controls within the listview. Note that it's not something you will be able to do with a trivial amount of code (though not an unobtainable goal either).
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HI dears!
i m having a finger print scanner Digital Persona U.R.U 4000. i wnt to create an application for thumb recognition. i need the guide line sdk given with it is out of my under standing. Is there any body who may help me in this regard. or some one already done such sort of work using its sdk. Waiting 4 reply anxiously
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For something this specialized I'd look for a help forum from the hardware developer, or failing that try posting on a large broadbased forum or newsgroup, with only a few dozen heavy posters it's unlikely that anyone here will have used the same hardware you're having trouble with. YOu could also try searching sourceforge for a program doing something similar.
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