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Oh, another thing,
What I'm trying to do over there is actually one part of a mergin process of 2 datatables.
Actually is not a merge, it is an update.
The old dataset will be updated to look exactly like the new one, wich means that new rows will be added, old rows will be updated and old rows will be removed.
Well, I've just discovered the DataSet.Merge(DataSet) function and it is quite usefull.
The problem is that it doesn't seem to remove old rows in the target dataset that are not in the (updated version) source dataset.
Is there a way to do this not manually? A function? A property? I don't know... something that would make the Merge function delete rows from the target dataset.
Thanks in advance!
Oscar
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Can no one help me with this ?
Thanks
Oscar
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Hello,
1) What is the best way to check the anonymous proxy?
2) How to check whether a particular proxy server is enabled SSL or not?
Let's say there is a list of anonymous proxies [^]. I wanna check which server is up and running and which server is enabled SSL...
How can I do that?
Initially, I was thinking to use "My.Computer.Network.Ping(url)" method but we can't specify the port so that I can't use it in my case.. What about WebRequest?
In this page[^], they wrote like below
What is a free proxy checker?
Free service trying to provide daily updated list of public HTTP proxy servers. Usually provide small list of proxies with low percent of functioning servers due to hosting restrictions on CPU time (they simply can't allow themselves to check many proxies every second especially in parallel).
So, I believe that there are some ways to check the proxy server and SSL..
Any idea? Thanks in advance
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Which platform (asp.net or C# client)?
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Bert delaVega wrote: Which platform (asp.net or C# client)?
Either one is okay for me.
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Try using Tcpclient to connect to the listed ports. That'll give you an indication if the proxy is active or not.
Namespace: System.Net.Sockets
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thanks.
#1) Will it be worked with URL?
#2) How can I check whether a particular server is enabled SSL or not?
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private Bitmap rotateImage(Bitmap b, float angle)
{
Bitmap bmp1 = new Bitmap(b.Width, b.Height);
Graphics g = Graphics.FromImage(bmp1);
g.TranslateTransform((float)b.Width / 2, (float)b.Height / 2);
//rotation
g.RotateTransform(angle);
g.TranslateTransform(-(float)b.Width / 2, -(float)b.Height / 2);
g.DrawImage(b, new Point(0, 0));
return bmp1;
}
I found this code in a site..This deals with Rotating an image..
But when i crop with this... Image is getting vanished on its edges..
How to perform rotation without any modifications in the image size? Any modidications in this or any clues?
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If you rotate an image, unless it's a square the dimensions will change, only the area stays constant.
Luckie wrote: Bitmap bmp1 = new Bitmap(b.Width, b.Height);
The problem is above.
You'll need to size the image appropriately, guarenteeing enough room for a rotated image to fit. At the very least the size will need to be a square of the largest dimension of the original image. You can crop the image appropriately afterwards.
I'm largely language agnostic
After a while they all bug me 
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MidwestLimey wrote: You'll need to size the image appropriately, guarenteeing enough room for a rotated image to fit. At the very least the size will need to be a square of the largest dimension of the original image. You can crop the image appropriately afterwards.
Don't get you mate
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If for instance you have a 5x9 image, to rotate 90 or 270 degrees you would need a square of 9x5 for the resulting image to fit. Since it needs to also hold the original image it would need to be 9x9. If you're rotating by some discreet amount (see post below), you'll need to calculate how much room you'll need, size the original image appropriately and then resize the image afterwards to your required dimensions.
I'm largely language agnostic
After a while they all bug me
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MidwestLimey wrote: you'll need to calculate how much room you'll need, size the original image appropriately and then resize the image afterwards to your required dimensions.
Any other way?
Don't try to make someone love you..Try to be the one who can be loved...
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Can u just modify it in the coding and reply or just quote the lines to be modified.. 
Don't try to make someone love you..Try to be the one who can be loved...
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MidwestLimey wrote: You'll need to size the image appropriately, guarenteeing enough room for a rotated image to fit. At the very least the size will need to be a square of the largest dimension of the original image. You can crop the image appropriately afterwards.
No, the largest it would need to be is the length of the diagonal (for a rotation that lays a diagonal along the X or Y axis). (x^2+y^2)^.5
You know, every time I tried to win a bar-bet about being able to count to 1000 using my fingers I always got punched out when I reached 4....
-- El Corazon
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Ya, my frazzled mind was stuck on 90 degrees
I'm largely language agnostic
After a while they all bug me
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Hi, i have this option that allows use to change MDIClient mdiparent background color to their choice. This is my code
<br />
private void mnuBackGroundColor_Click(object sender, EventArgs e)<br />
{<br />
MdiClient ctlMDI;<br />
customColor = new ColorDialog();<br />
customColor.ShowDialog();<br />
<br />
foreach (Control ctl in this.Controls)<br />
{<br />
try<br />
{<br />
ctlMDI = (MdiClient)ctl;<br />
<br />
ctlMDI.BackColor = customColor.Color;<br />
}<br />
catch (InvalidCastException exc)<br />
{<br />
}<br />
<br />
}<br />
}
I have another option that allows usr to choose the image they wan for their background instead of just color. How do i do that?
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Is the MdiClient a form? If so then you can set the BackgroundImage property of it.
I doubt it. If it isn't intuitive then we need to fix it. - Chris Maunder
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I am creating an application that copies files from one location to another sometimes locally and sometimes over a network.
I am using buffered streams to accomplish desired functionality and it is working as expected but I am unsure on what size my buffer should be. I have experimented with different sizes and I have had varied results.
Recap:
What is an optimal size for the buffer when copying files?
Note:
File size varies from 1 byte to 1.5Gb never more.
When the game is over the Pawn and the King go into the same box.
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MicealG wrote: What is an optimal size for the buffer when copying files?
Depends. Optimal size for reading/writing to/from Disk is based on the OS and hardware I/O specifications. Optimal size for transporting network packets is based on network protocols and hardware however the network stack you are using, like TCP/IP does that buffering for you so you don't deal with that issue.
led mike
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Thanks for the reply.
Is there any way I could work out an optimal buffer size to use depending on the file size?
When the game is over the Pawn and the King go into the same box.
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MicealG wrote: Is there any way I could work out an optimal buffer size to use depending on the file size?
No. It has nothing to do with the file size. The networking software/hardware determines the optimal buffer size. For Disk I/O it is dependent on the Hardware / OS File System combination. Always use an exponent of 2 since the systems do. When testing Disks I have found that 2k or 4k will prove out as the optimal size. I have never looked at network transfers but if you are doing Disk I/O it seems that should be your determining factor.
led mike
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The streams are buffered by the file system and the network layer, so a buffer smaller than one cluster or smaller than one network packet, doesn't have any buffering effect at all.
Other than that, the buffer size shouldn't matter that much.
Have you tried using two buffers and asynchronous reading and writing, so that you read to one buffer while writing from the other?
Despite everything, the person most likely to be fooling you next is yourself.
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Guffa wrote: Other than that, the buffer size shouldn't matter that much.
Not true for file I/O. Play around with it and see. 
led mike
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What the others have said is true - it depends on many things.
However - even though an optimal buffer size can only be determined by implementing a complex (and thus error-prone - just look at Vista) self-tuning algorithm of some kind, I guess you're just asking for an arbitrary but "reasonable" value. Correct?
I've used 64K (65536) bytes for the last five years or so. Equals the maximum stripe size of popular RAID controllers, the maximum block size of popular tape devices and the default maximum window size of the Windows TCP stack (pre-RSS).
The world is changing, though, so I'm considering reconsidering that. Whenever I have a budget allowing finer points, I make buffer sizes configurable (still with a 64K default, though).
On occasion I've experimented with 256K or 512K and it seems to work OK as well. Being old enough to remember computers with less RAM than that, it always gives me an eerie feeling - but given the RAM in computers of today, 512KB is really not a lot of memory to set aside for a buffer.
In any case: Like someone said, powers of two still feel like the right thing to use. Actually moot when it comes to network traffic (TCP couldn't care less), but disks still stick to that for block sizes, allocation units and stripe sizes.
Later,
--
Peter
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PeterTheSwede wrote: On occasion I've experimented with 256K or 512K and it seems to work OK as well.
On consideration here is that an object larger than 85 kB will be allocated on the large objects heap instead of the regular heap. The large objects heap is not compacted in the way that the regular heap is, so the application might not be able to return that memory to the system when you have released the buffer.
Not a very serious concern as it's not very much memory, but it might be good to know.
PeterTheSwede wrote: Being old enough to remember computers with less RAM than that
Those were the days... My first programming was done on a Sinclair ZX81 with 4 kB of memory. My first own computer was an Atari 600XL with 16 kb of memory. After that I got an Atari 130XE with massive 128 kB of memory. It had a special chip for swapping memory banks, as the CPU wasn't able to address more than 64 KB of memory...
Despite everything, the person most likely to be fooling you next is yourself.
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