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So I have run into a serious problem that did not exist when I left work last week. I have items that are dissappearing from a collection as I iterate through it. I have a class called host which has a List<String> in it which has a list of Urls. There is only one way to get and remove urls, a property called NextUrl.
<br />
public string NextUrl<br />
{<br />
get<br />
{<br />
string url;<br />
lock (_urls)<br />
{<br />
url = _urls[0];<br />
_urls.RemoveAt(0);<br />
_lastTouched = DateTime.Now; <br />
}<br />
return url;<br />
}<br />
}
The loop is as follows
<br />
foreach (Host h in currentList)<br />
{<br />
if (h.Count > 0)<br />
{<br />
DownloadUrlAsync(h.NextUrl);<br />
}<br />
} <br />
currentList is a contains a List of hosts.
If I step though the code at both the if statement, the { and DownloadAsynucUrl items dissapear from the collection. I am not sure how this happens. By the time it gets to the NextUrl property there are no Urls left in the collection. When the program first hits the if statement there are 6. Has anyone seen anything like this? Am I crazy?
Thanks,
Steve
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How to migrate the code of .Net 1.1 (2003) framework to .Net 2.0 (2005)...
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Open the project in Visual Studio 2005, and you will be presented with the migration wizard.
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b { font-weight: normal; }
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But its not migrating..it just creating a solution with out any .cs files in my old project in framework 1.1 (2003)..is anything needed to be done in the wizard for this thing
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Arun Kumar Babu wrote: with out any .cs files in my old project
Do you mean that no .cs files have been added or modified?
That's right. Migration from VS 2003 to VS 2005 does not modify source code, as VS 2005 supoorts both new and old syntex. The migration is done through adding/changing a couple of project setting flags.
Stricktly speaking, only the VS 2003 project has been migrated and the source code hasn't.
- It's easier to make than to correct a mistake.
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Not Like that..I have a project with some references in .Net framework 1.1(2003)..When i open the solution in .Net Framework 2.0,all the .cs files and reference are removed,showing only the solution folder in solution explorer...
Jun Du wrote: So i want evry one to be there when i open in framework 2.0
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Arun Kumar Babu wrote: Not Like that..I have a project with some references in .Net framework 1.1(2003)..When i open the solution in .Net Framework 2.0,all the .cs files and reference are removed,showing only the solution folder in solution explorer...
I never encountered that.
Could you check what language your .NET 1.1 code was written in and if your VS2005 installation has support for that language?
BTW, I didn't say the following in your quote:
Arun Kumar Babu wrote: Jun Du wrote:
So i want evry one to be there when i open in framework 2.0
- It's easier to make than to correct a mistake.
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Hi,
I have recetly moved from Java to .NET/C#.
I am trying to download a file from my test website and save it to disk on any client machine (this means getting access to each clients hard disk etc).
In java this required the use of applets etc...
I have so far not found the corresponding code in C#/.NET.
I am wanting to
(i) click a button in a web page on my website.
(ii) do some security checks before proceeding
(iii) stream the file(s) from the source directory on the website host machine
(iv) stream the file(s) to the client
(v) save the file(s) to the clients hard disk.
(vi) the original file may need to be zipped so the client side operation may require an automatic unzipping process
I know I could zip all the files and then add a link to my webpage that the user selects to download the file and then they manually unzip the relevant files but in some instances an automatic approach would be better.
Any help greatly appreciated.
I have also posted this to the C# board if this is the wrong discussion board.
I will keep searching.
Regards Andrew Mercer
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Hi all,
Is there a way to maintain authentification if I had to send multiple requests ?
Here my current code:
HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create("http://.........");<br />
webrequest.Credentials = new NetworkCredential("....", "......");<br />
webresponse = (HttpWebResponse)webrequest.GetResponse();
For example, with MFC, I just create 1 HttpConnection and I can do any number of requests.
m_pHttpConnection = m_InternetSession.GetHttpConnection(strServer, nPort, strUserName, strPassword);
But may be internally, the login password is sent for every request?
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I have a vb.net (.net 2.0) app that I installed. I know where the app is on my system, and I can run it from a batch file, but I can't seem to get the damn thing to run from within a non-.Net app. I've tried createprocess, and winexec, but nothing seems to work. I even tried to use createprocess to run cmd.exe with the batch file as a parameter, but that doesn't work either.
Does anyone have any clues?
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
-- modified at 10:21 Monday 12th June, 2006
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Hi, i just want to know if the .NET Framework can be installed and run apps in a 16 bit 486 based PC with win9X or win3X. Thanks in advance.
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I have a application built in .NET Framework 1.1. I have to migrate it to .NET framework 2.0.
Can anyone tell me how to go about this migration. I tried to open that application in VS-2005 but some files were not loaded in the IDE as a result of which I was unable to compile the application.
Kindly let me know how to go about the migration from 1.1 to 2.0
Thanks
Kunal
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What type of application is it? Windows Forms? ASP.NET? VC++?
Kevin
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Thats a ASP.NET web application with VB as the code-behind. I got a suggestion earlier - to try and compile the application and then work-out the errors. But some files fail to load while the application is started with VS2005.
Can you please provide a workaround to this ?
Thanks
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Depending on how simple your web app. is you could be in for a tough time. Where I work one of my colleagues has been tasked with trying to upgrade our main application from 1.1 to 2.0 and so far it's taken several days and theres's still no light at the end of the tunnel!
However, there are one or two documents floating around which are supposed to give guidance on how to do it. Google on "upgrading asp.net to 2.0" or something like that.
Kevin
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I want to save a linked list to an Access97 database. How do I do it in ADO.Net?
The following code doesn't compile/work..
CNode* pNode;
pDataRow->Item["ptrNode"] = &pNode;
I don't know what this compile error means "error C2102: '&' requires l-value"
Also Access97 has a "number" data type, can it store a pointer???
Can anyone help???
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Saving a pointer to a node might not be such a good idea. The pointer is a physical address and that can change the next time the application is run. In a .NET application that can change while the application is running.
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
My: Website | Blog
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ooh yes, didn't think of that, thanks.
So do you know how to persist/save a linked list to Access97 ???
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You can't save a linked list to a database. Either you have to serialize the entire list (which you probably have to do yourself), or save each item to a separate record.
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b { font-weight: normal; }
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Guffa,
Are you saying that if the entire linked list is serialised the system will maintain the links between the nodes, and I don't need to code/worry about it?
Do you know a code example of of a serialised linked list???
I was trying to save each node as a distinct record like your second suggestion. But how do you save the links using this option?
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dragon_n_me wrote: Are you saying that if the entire linked list is serialised the system will maintain the links between the nodes, and I don't need to code/worry about it?
Yes, and no. References can't be maintained in any other form than a reference. If the list is serialized it will store the information about how the items are linked, and recreate the references when it's deserialized.
Do you know a code example of of a serialised linked list???
No.
I was trying to save each node as a distinct record like your second suggestion. But how do you save the links using this option?
You can't save references, you have to save some information that you can use to recreate the references.
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b { font-weight: normal; }
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To serialize, iterate over the linked list. Maintain a counter while you are iterating. Save each list item in the database along with the counter.
To deserialize, query the database for your list information, sorted by counter. Iterate over the list information, appending each record as a node to the end of your list.
-- modified at 23:57 Monday 10th July, 2006
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I'm new to .Net but i've created a few windows apps however when i try and create a web project either C#.net or VB.net i get an error message "unable to create ...." and "http.1 error 500 " I'm using windows server 2003 and am not connected to any network, it's stand alone. With the old visual interdev i can create it with no problem. Has anyone ever come accross this or maybe have an idea as to what i can try.
none
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