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Maybe take a look at the rapi.dll and see if it does what you need, you need to p/invoke the methodes.
Take a look here
And here
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how to perform calculations in datagridview columns
(adding two columns and result in new column)
can any one suggest me any site
thanks in advance
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Some of the gurus on here will probably have a better idea for this but this is what I would try:
Dim myCol As New DataGridViewColumn ' I think this is the type. My code was an image column<br />
myCol.Name = "colname"<br />
dgvMyGrid.Columns.Insert(1, myCol)
Then you'll need to access the values of the numbers you need to add and the column where the result should go. I do most of my processing in my OnCellFormatting event. And in there, I access the values of the current row's items with something like this:
(sender.Rows(e.RowIndex).Cells(14).Value <br />
Of course, you'll need to know your column's number. And don't forget to account for the one you entered.
Hope this helps.
Denise "Hypermommy" Duggan
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Hi
I have made a project and used
tabcontrol of Visual Studio 2005. The problem is that when I run the project and bring the mouse arrow to the tab heading it start blinking/trembling.
Please, reply if anybody can.
Thanks in advance.
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It does not give idea..Provide some details..some code snippet..otherwise none can understand..
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seems like you have a lot of activity in some kind of hover event.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Hi,
I want to append a file into a remote server file using FTP can you please suggest how i can do it .net 1.1
Thanks in Advance
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Webclient supports only upLoadFile and UpLoadData , But how can i use to append a file which is already existing in Server.
if you have any sample code to perform Append please provide me i will be great help
Thanks in Advance.
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Member 4181669 wrote: But how can i use to append a file which is already existing in Server.
You need to read the existing file contents, do the appending from your application and upload the new file. FTP doesn't provide a way to append to a file.
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Hi. I've a multithreaded service application with many threads accessing a comom resource. I have a typical Readers/Writers environment, where many threads may read at the same time but only one can write to the resource, exclusively.
The thing is, whenever two threads (or more) asks for writing permission, I do not need to wait for the first thread to finish, I can just abort it (the first thread is no longer needed) and execute the second thread. Since writing is an expensive operation, it's desirable that I abort the first thread and execute the second.
So, here's my doubt: if I abort a thread that holds a lock, will it release the lock?
My simplified code looks like this:
private static System.Threading.Thread WritingThread =
System.Threading.Thread(MyClass.PerformWriting)
private void TryWrite()
{
If (WritingThread.IsAlive)
WritingThread.Abort();
WritingThread.Start();
}
private void PerformWriting()
{
MyReaderWriterLockSlim.EnterWriteLock();
try{
}
finally{
MyReaderWriterLockSlim.ExitWriteLock();
}
}
So here's the deal. I have a commom fixed writing thread for everybody, so I can test if the thread is already running, and if is, I can just abort it and initiate it again. This get the effect of aborting the first writing and executing the second. Whenever a thread needs to write to the resouce, it just calls the TryWrite function. The original calling thread doesn't need to wait the end of the operation, so it returns and finishes.
But, since "writing operation" takes a long time, it is more likely that the WritingThread will be aborted when it is writing, that is, when it holds the lock.
Is that code ok, or it will deadlock when the thread gets aborted in the middle of the writing?
Regards,
Leonardo Muzzi
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Hi,
aborting a thread is a bad idea, as it (1) may not occur right away (e.g. when inside some I/O operations) and (2) will get kicked out in an unknown state, without getting a chance for cleaning up after itself.
so the recommendation is not to abort at all, rather to implement a cooperative thread exit scheme, where the thread regularly checks a flag to make sure it should continue its work or exit.
And as you would abort a thread to start a similar thread, there is no need to do any thread operation at all, just tell the thread to abandon its current job and start executing the new job.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Good ! I'll try implementing the "restart flag" inside the writing operation.
But, let's say I can not interfere in the writing code (I don't know if I can, not my implementation), so I can't change the writing operation to test a flag eventually. Any other ideas?
Thanks !
Regards,
Leonardo Muzzi
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I'm thinking about implementing another thread that just sleeps for a while and checks for the flag, and abort the WritingThread if it finds the restart flag true. This new thread would hold the lock and therefore I can make sure it will release it.
Still, I'm aborting threads and creating new ones.
Is it good?
Regards,
Leonardo Muzzi
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You don't need a thread to hold a lock; you can implement the thread stuff and the lock inside a class.
BTW: when you reply to yourself, you're the one getting the mail notification...
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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This[^] is the best I ever found about .NET threading.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Excelent text! This is what I needed to know:
"All catch/finally blocks are honored, and never aborted mid-stream"
So the first code would work.
I'll check if I can change the writing operation to test a restart flag anyway!
Thanks for the help !
(sorry for the self-reply)
Regards,
Leonardo Muzzi
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You're welcome.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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"All catch/finally blocks are honored, and never aborted mid-stream..."
...but code which relies upon certain instructions not throwing exceptions may be broken if they do so. See the article's comments about 'using'. By the sound of it, using abort exceptions doesn't sound very safe. Using interrupt would seem much safer, provided that any time-consuming loops that don't engage in managed sleeping test a flag for whether they should exit.
The "using" directive is nice in many ways--it's too bad that there are so many wrinkles when using it. If a constructor could take a byRef parameter indicating where the new object should be stored, and if it could store the newly-created object there before leaving its outermost try/catch block, one could emulate a 'Using' in such a way as to avoid leaving dangling resources in case of an abort. Unfortunately, I don't know any way to make anything remotely like that work as smoothly as "using".
Too bad iDisposable seems to have been an afterthought (unlike Finalize, which is common to all objects). If Finalize took a parameter which indicated whether to perform a garbage-collect cleanup, explicit disposal, or failed-object-creation cleanup (objects that wanted to receive a garbage-collect cleanup would have to register) that would have simplified a lot of things.
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My web site calling to the proxy web service using javascript and proxy web service calling actual local web service. Till yesterday its working fine. now suddenly its giving me error.When i run project first few (2-3) web request giving response properly but after that its giving me following error in fiddler.
System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Net.WebException: The request failed with HTTP status 403: Access Forbidden.
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at localhost.Service.ProcessGetRequest(String data) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\globexmall\d53d5ac4\3be925d4\App_WebReferences.xxn2txa_.0.cs:line 51
at Globexmall.Proxy.GetResponse(XmlDocument xmlData) in c:\Inetpub\wwwroot\GlobexMall\App_Code\Proxy.cs:line 59
--- End of inner exception stack trace ---
using following code i am making call to the local web service
[WebMethod]
public string GetResponse(XmlDocument xmlData)
{
localhost.Service Wservice = new localhost.Service();
XmlNode xmlResponse = Wservice.ProcessGetRequest(xmlData.OuterXml);
XmlDocument wsResponse = new XmlDocument();
wsResponse.AppendChild(wsResponse.ImportNode(xmlResponse, true));
return wsResponse.InnerXml;
}
If anyone knows the answer then plz help me as soon as possible
Thanx in advance
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Your first clue is here:
"HTTP status 403: Access Forbidden"
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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Hi al
how can i convert the integer into string on linq database by using c#
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int.Parse(str)
ToshiyaTSURU <turutosiya@gmail.com>
http://www.google.com/profiles/turutosiya
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For higher performance you can use Convert.ToInt32
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