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Thanks Guffa for your help.
I think my incorrect code copied confused you.
The fact is like this:
1)This code can work and the drNew.ItemArray have my wanted data.
------------
object[] obj = new object[dr.ItemArray.Length];
dr.ItemArray.CopyTo(obj, 0);
drNew.ItemArray = obj;
2)But the method below seems bad.
------------
drNew.ItemArray = new object[dr.ItemArray.Length];
dr.ItemArray.CopyTo(drNew.ItemArray, 0);
dtDest.Rows.Add(drNew);
i found drNew.ItemArray is still empty.I don't known why?
If we dream, every thing is possible!
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dealon wrote: i found drNew.ItemArray is still empty.I don't known why?
I already explained why: The ItemArray property creates a new array. Changing anything in that array doesn't change anything in the DataRow. So, you create a new array, fill it with data, and throw it away.
Despite everything, the person most likely to be fooling you next is yourself.
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I see.Thank you very much. 
If we dream, every thing is possible!
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I'm trying to disconnect socket connection and then want to reuse again when any new client request comes but as I Press disconnect and Re-login then get following Error Message
SocketException was unhandled.
Message:"A blocking operation was interrupted by a call to WSACancelBlockingCall"
ErrorCode:10004
Please help me out how to close socket properly so user re-login again successfully.
Regards,
Shanzay
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It would be hard to guess the exact cause without looking at the code. However the WSACancelBlockinCall exception generally happens when you stop listening as Listen is a blocking method.
Call the Close method to close the connection.
~Dave
Dave Traister
Software Engineer
ComponentOne LLC
www.ComponentOne.com
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Hi,
I want to get byte[] from MultiPage TIFF image.
Have tried out lots of things but not getting solution.
Please suggest me.
Image final; <br />
final = GetMultipageTiffImage();<br />
ImageConverter converter = new ImageConverter();<br />
Byte[] imageByteArray = (byte[])converter.ConvertTo(final, typeof(byte[])); this line is having error. as tiff image is multiple page file.
If doing with below code then also getting same error
byte[] blob;<br />
MemoryStream ms = new MemoryStream();<br />
Image image = GetImage();
image.Save(ms,System.Drawing.Imaging.ImageFormat.Tiff);
blob = ms.ToArray();
Thanks,
Sun Rays
To get something you must have to try once.
My Articles
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What is an image converter ? What does GetMultipageTiffImage do ? Which line has the error ?
Read my image processing articles for info on how to access an images bytes directly.
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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how to adding numbers from multiple textboxes?
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You can't add the numbers as long as they are in the form of strings. You have to convert them to numerical data before you add them.
There are plenty of methods to parse numerical data, like Int32.Parse, Int32.TryParse, Convert.ToInt32, and similar for most numerical data types.
Despite everything, the person most likely to be fooling you next is yourself.
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Or he could use VB. At his own risk.
Semicolons: The number one seller of ostomy bags world wide. - dan neely
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Try NumericUpDown instead.
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Could someone clarify a question i have about the code snippet shown below, i know when the useing block ends the OleDbConnection's Dispose method is called, but what i'm not clear on, is the OleDbDataAdapter's Dispose method called also as it is inside the using statement or must I Call it my self? Any information wuold be appreciated.
using (OleDbConnection connection = new OleDbConnection(_connectString))
{
OleDbDataAdapter adapter = new OleDbDataAdapter();
adapter.SelectCommand = new OleDbCommand(_selectCmdText, connection);
// additional processing
}
Thank you in advance.
William T
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I'm pretty sure (unless someone wants to correct me) that everything will dispose of itself accordingly. If you have any connections open though, I'd recommend closing them before everything is thrown through the garbage collector.
Cheers,
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Nope, the adapter.Dispose() will not be called.
The
using (OleDbConnection connection = new OleDbConnection(_connectString))<br />
{<br />
}
is equivalent to
<br />
OleDbConnection connection = new OleDbConnection(_connectString);<br />
try<br />
{<br />
}<br />
finally <br />
{ <br />
connection.Dispose(); <br />
}
If you want to dispose the adapter you must wrap it inside a using, something like this:
<br />
using (OleDbConnection connection = new OleDbConnection(_connectString))<br />
using (OleDbDataAdapter adapter = new OleDbDataAdapter())<br />
{<br />
}<br />
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Hi
I have created a Trigger Statement and assigned to CommandText property of
sqlCommand.While Try to Execute using
command.ExecuteNonQuery() it throws an exception like
{"Incorrect syntax near the keyword 'TRIGGER'."}
Created Trigger Statement:
CREATE TRIGGER SampleTrigger
ON dbo.sample
AFTER INSERT
AS begin
SET NOCOUNT ON
DECLARE @Name AS nvarchar(50)
SELECT @Name= i.Name from inserted i
DECLARE @Address AS nvarchar(50)
SELECT @Address= i.Address from inserted i
insert into triggertest(statusID,FieldName,FieldValue) values( 25,'Name',@Name)
insert into triggertest(statusID,FieldName,FieldValue) values( 25,'Address',@Address)
end
Can anyone help me?
Thanks in advance
Sri
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I don't see anything wrong with it.
You should ask SQL questions in the SQL forum.
Despite everything, the person most likely to be fooling you next is yourself.
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I am trying to use SocketOptionName.BlockSource which is a poorly documented socket option. How do I use this option and does it block all packets from an address like I think it does?
I would think that this should work
IPAddress TestIP = IPAddress.Parse("127.0.0.1");
ClassSocK.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.BlockSource, TestIP);
but it does not. I get the fallowing error
"The specified value is not valid.
Parameter name: optionValue"
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Hi!
How can i find out the name of function which is under execution. For example, please see the following code:
void TestFunction()
{
String currentFunctionName = "TestFunction";
}
In the above code, i've hardcoded the name of function in variable currentFunctionName. I want to do that programatically. Please tell me how can i do so. Back during the days of C+, i use __FUNCTION__, please tell me how can i do this is C#. Is it an area of reflection ?
Imtiaz
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StackTrace st = new StackTrace();
string methodName = st.GetFrame(0).GetMethod().Name;
I'm largely language agnostic
After a while they all bug me 
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string currentMethod = MethodInfo.GetCurrentMethod().Name;
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i m trying to insert byte[] in a file but FileStream and BinaryReader replaces the byte[], for example i want to insert byte[] at 3000 offset, so i tried to write like this :
byte[] tmp_byte = new byte[10]
FileStream fs = new FileStream("C:\\abc.kk", FileMode.Open);
fs.Seek(3000, SeekOrigin.Begin);
fs.Write(tmp_byte);
this code replaces the previous byte[] with new one, but i want to insert... how can i do this ?
thanks
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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You'd have to write the first 3000 bytes to a new stream, then write yout byte[], then write the rest of the data to the new stream. Then you write this whole stream back to the file.
I don't think there's a better way to do it either. 
My current favourite word is: I'm starting to run out of fav. words!
-SK Genius
Game Programming articles start - here[ ^]-
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damn my data is in gbs, it will take lots of time 
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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Hi!
This is what i have so far...
foreach (string result in Ldap.Query(filtertext))
{
ThreadStart starter = delegate { NetInfo.Resolve(result, out ipResult); };
Thread t = new Thread(starter);
t.Start();
while (t.ThreadState.ToString() == "Running")
{
Thread.Sleep(50);
}
}
The problem in my mind is that i'm making the UI thread sleep... this ties up the UI and seeing as how i started trying to integrate multi-threading to stop something like this and increase the speed at which i can ping other machine's and return there address assuming they are up. What should i do because i need alot of the values off the UI and i'd still like to not tie up the UI i've been reading a bit about using a threadpool i'm not sure if that would be faster or not... The other problem that i'm running into is that i have to pull a bunch of values off the form and then obviously i need to put other values back on the form in a listview. I was thinking that i could start a new thread that starts all the threads that pulls all the values back and then stores them into something like a arraylist and pushes the values back to the form... is this a good idea? or should i just forget about multi threading? I hope this isn't to muddled up and is clear enough for people to understand if you need further clarification lemme know...
I know the human being and fish can coexist peacefully. -George Dubya Bush
Don't believe me?
http://politicalhumor.about.com/library/blbushism-fish.htm
Yes thats right he actually said that...
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I agree that "Thread.Sleep(50);" is sleeping the UI thread.
Bad thing to do, generally speaking.
You might want to change the
while(t.ThreadState.ToString() == "Running"){}
into
while(t.ThreadState == ThreadState.Running){}
Strings are slower, and string compare should be done using
String.Compare(string a, string b), not a == b, which does not compare the string content.
There are a number of mechanisms for sharing data between the UI and other threads. A simple one is to have the thread Invoke a call on the form. This will allow the other thread to pass data back to the form with out UI sync problems.
You also need to pass the initial data in to the thread you are starting.
Generally, I create a class that has the threaded method, and holds the data (or references) that are needed. The UI thread creates objects of that class, hands them the data, and tells them to go start themselves. That way you just start them,and don't have to wait for any type of sync events before you start the next.
LMK if that helps.
Learn to write self marginalizing code!
Call 1-888-BAD-CODE
------------------
Silver member by constant and unflinching longevity.
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