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With .NET Framework 3.0 MS shipped some extensions to System.Collections.Generic namespace. One of it is the generic class SynchronizedKeyedCollection<k,t>.
First seen I thought, wow I have ever wanted a thread-safe dictionary.
So I tried to use that class in current project. But: What the hell. Those framework designer were not able to have same interface to that class like dictionary has.
The method Add() only takes a <t>. To assign a key you have to call ChangeItemKey method.
There is no method such TryGetValue to check if an object with requested key exists.
And so on.
Did I miss something on understanding that class or is there a deeper reason changing the "interface-pattern" of the Dictionary class?
Have you ever dealed with that class?
I didn't find anything in google about this....
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Hi Guys,
I have a structure in C / C++ as follows:
typedef struct MyDataFields{
char Id[12];
char Name[32];
char Address[4][32];
char DateLastSale[12];
long TransCount;
int PointsToDate;
char Spare[20];
}MyData;
This structure is written to a flat file in one fwrite call and is read in using fread. However this is legacy stuff now and we are about to undertake a re-write but we need to be able to read these files in C# .Net 2.0.
I have searched the web for days but have got nowhere. I have saw 1 or 2 examples where it has been said to create a class to represent the struct, there must be however a simpler way of doing this.
Anyone done this before that can point me in the right direction or some sample code based on the struct above.
Thanks in Advance
Keith
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So lets get this straight - you've found the right way to do it, but you want an easy way?
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Hi J4amieC
<blockquote class="FQ"><div class="FQA">J4amieC wrote:</div>So lets get this straight - you've found the right way to do it, but you want an easy way? </blockquote>
No i'm not saying that, i'm simply saying that its a lot easier in C where you read the struct into memory modify it and write it back out again. I was thinking that it should be as straight foward in C#.
Regards
Keith
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Yes its just as easy in C#, we write a struct (which must be serializable) and we serialize it to a file and deserialize it back to an instance in memory.
Granted its not as easy as 1 line call to whatever your C++ functions were - but in essence its the same.
Check out a Binary Serialization[^]
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Thanks J4amieC, that looks to be what i'm looking for.
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Hi
I have the following code which is sent to the user via e-mail
How can I put a linebreak inbetween the string values so that it breaks it up
completeMessage.Body = tbareasize.Text + tbnotes.Text + tbroomdesc.Text + ddl_areasLevel2.Text + ddl_areasLevel1.Text;
i need like a br inbetween each textbox
thanks
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It depends whether you're sending the mail in HTML format or plain text.
for HTML - just append "<br />" between each value
for Plain text - Append "/r/n" (or Environment.NewLine if you want to be super-safe) between each value.
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One change to what J4aimeC said:
Use Environment.NewLine but if for some reason you want to use the escape characters, it's "\r\n".
Cheers,
Vikram.
"If a trend is truly global, then that trend ought to be visible across ANY subset of that data" - fat_boy
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How is that a "change" from what I said when I said exactly that? (and no, I did not edit my post!)
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You suggested "\r\n" then said "or use Environment.Newline" whereas the better solution is to always use Environment.Newline and never use the escape codes directly.
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And how often do you think Env.NewLine would make a difference?
ie, is ANYONE running ASP.NET on a server that isnt Windows (where the newline chars are anything but \r\n). Are they likely to ever?
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Also, Jamie used the forward slash in the escape sequence, which is wrong.
Cheers,
Vikram.
"If a trend is truly global, then that trend ought to be visible across ANY subset of that data" - fat_boy
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Your post says a newline is equivalent to "/r/n" which is clearly wrong. (note the forward slashes)
Cheers,
Vikram.
"If a trend is truly global, then that trend ought to be visible across ANY subset of that data" - fat_boy
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Now in that you're totally right. Simple mistake. Well spotted.
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(Psst... I never use Environment.Newline either.)
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Hey..
I'm lokking after one exampel to show me how can i make a Logon Script in C# to map network drive or to install a priner.
Can any body help me to refer to a site with exampel or can any body show me how i can do it.
Thansk very mutch..
SOry my english..
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hi
when i am installing setup project i got sqlncli.dll
pls anybody give solution how i can i overcome that probalm
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sekhar2008 wrote: when i am installing setup project i got sqlncli.dll
pls anybody give solution how i can i overcome that probalm
This does not describe a problem.
sekhar2008 wrote: when i am installing setup project i got sqlncli.dll
This describes possesion of a DLL file when you are installing your application. Typically that is not a problem.
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when i am installing setup (project) i got error like
error:this application has failed to start because sqlncli.dll was not found.re-installing the application may fix this probalm.
pls idea how can i over come that problam
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Remove the reference to sqlncli and then if it's needed re-add it.
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Hi all,
After updating my Listview I wish that the first visible line will remain the same as before.
Iv'e tried setting the TopItem property to the correct item, and well - sometimes it works and sometimes it doesn't.
For example:
lvwMyListview.TopItem = lvwMyListview.Items[myItemIdx];
and after that call the result is that myItemIdx != lvwMyListview.TopItem.Index (for example: myItemIdx == 47 while lvwMyListview.TopItem.Index == 44).
I could understand this behaviour if this is the case (taken from MSDN):
"If you set the TopItem property to an item in the last page of the ListView, the item will automatically be scrolled into view; however, TopItem will be set to the actual top item of the last page."
However - this is not the case! even if the visible part of my listview contains only one line (index 47 for example), the new top item index if different (44 for example, meaning I need to scroll 3 lines down to get the desired line visible).
Does anyone has any explenations\solutions for this behaviour?
Thanks a lot!
Eyal.
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Maybe the index of the choosen item (your first visible line) changes in the updating process.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
[my articles]
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