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You need to refer to the row data - not the column:
string smtpServer =
newDataSet1.Settings.Rows[0][newDataSet1.Settings.SmtpServerColumn]; This gets the value in the first row under the SmtpServerColumn (you can also use the name or 0-based index, although using the DataColumn instance will be faster).
I suggest you read the documentation for the DataSet class and related documentation. If you're not familiar with this stuff, simply guessing won't teach you anything. Reading the documentation will help, and may be present you with some alternatives in order to do things more efficiently and with less development time.
Microsoft MVP, Visual C#
My Articles
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With making an arrays of Structures in C# .net, I have these questions:
How do I create?
How do I declare
How do I instansitate
How do I use it?
I have learned in C++ 6.0 how to such a thing and where should I place the array of structure?
Help ASAP and I have found this article named "Quick C#" on this site.
Sincerley,
ProgrammerA
Email me Please!!!
No foul language
Programming, Hardware, Software, Information System security, and OSs.
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Well, you don't have to instantiate a struct, correct? So you should be able to just get away with this:
MyStruct[] structs = new MyStruct[100];
Remember that structs are value structures, so to change values on structs in your array, access the array by index each time unless you pass one by index into a method using the ref keyword. It'd be simplest to just access values the same way:
<br />
int i = structs[10].Data;<br />
-Jeff
here, bloggy bloggy
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Search for Double Buffering innn this site to see some example of reducing flickering.
Mazy
"One who dives deep gets the pearls,the burning desire for realization brings the goal nearer." - Babuji
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Besides double-buffering, another problem could be that you're waiting to extract the bitmap from the assembly as an embedded resources until the event fires. This will take some time.
Either pre-extract and buffer the image before the event is fired (like buffering the next and previous images if you're not sure which will be next to display), or don't dispose of the image in the PictureBox until the other bitmap is ready.
Double-buffering will help the situation where you replace the bitmap in the PictureBox, however. Instead of disposing the current image and reading the next image in (so there's some "dead time" in between), the new image is drawn to an off-screen, compatible bitmap and displayed only once it has been rendered to this compatible bitmap. It can then be swapped with the on-screen bitmap fast enough that you shouldn't notice (large images may still flicker a little, however). .NET makes this pretty easy by setting the AllPaintingInWmPaint, DoubleBuffer, and UserPaint ControlStyles enum members using the protected SetStyle method (which requires that you'd extend the PictureBox control.
Microsoft MVP, Visual C#
My Articles
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I'm having problems sending an object to a web service. Instead of passing it directly to a web method, the proxy generates an alternative class that I must use.
To avoid that, can I xml serialize the object and send it directly to the web service?
If it's possible, can you briefly explain how to do that or where can I get the info?
Regards,
Diego F.
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What do you want exactly do? You can edit your messages to web service , see the documrntation for SoapExtension class in MSDN and googling for examples.
Mazy
"One who dives deep gets the pearls,the burning desire for realization brings the goal nearer." - Babuji
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What I want is working in the client with my custom class instead of working with the class that the proxy generates. Then, I want to pass directly the custom objects to the web service.
To get that, I must first use a fully XML serializable class, so I must have a wrapping class that uses my custom object as a public attribute.
The question is how to implement the wrapper as simple as possible. I saw an example but with too clases: the main class, an implementation of CollectionBase for the main class, a third class that uses the collection as a parameter, and the fourth that gives functionality to the third class.
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I have a project that contains several classes.
Class1 has a public variable, let's say var2, of type Class2.
Class2 has a public variable, x, of type ArrayList.
Finally, in x I load objects of another class, Class3, which has a public property named Myprop.
I cannot access MyProp from Class1. 
(like this: var2.x[index].Myprop). Why? What am I doing wrong?
I think I have to announce somehow that in x I load Class3 objects (my x is declared like this: public ArrayList x=new ArrayList())... I don't know.
Please help me!
Thanks
Cristina
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You have to cast the object returned from your Class2 accessor:
((Class3)var2.x[index]).Myprop
To be safe, however, you can't be sure that x at the specified index will have an object instance:
Class3 c = (Class3)var2.x[index];
if (c != null)
{
}
else
{
}
Alternately, you can use the as keyword:
Class3 c = var2.x[index] as Class3;
Ian Mariano - Bliki | Blog
"We are all wave equations in the information matrix of the universe" - me
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ian mariano wrote:
Alternately, you can use the as keyword
As I know, it's not an alternative, the following line would throw an exception if var2.x[index] is not of type Class3:
Class3 c = (Class3)var2.x[index];
but this will not:
Class3 c = var2.x[index] as Class3;
Don't forget, that's Persian Gulf not Arabian gulf!
Murphy:
Click Here![^]
I'm thirsty like sun, more landless than wind...
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The latter is still an alternative which is safer than a straight cast, since it won't throw an exception, it will evaluate to null if it can't be cast.
Either usage depends on the intent. I use the former method when ensured of a type (but I still do checks like using Type.IsAssignableFrom) .. as is just shorter 
Ian Mariano - Bliki | Blog
"We are all wave equations in the information matrix of the universe" - me
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Things are stored in ArrayList class in Object variables. So you need to cast them to your desired class when required:
((Class3)var2.x[index]).Myprop
I hope this helps!
abcdabcdabcdabcda
Don't forget, that's Persian Gulf not Arabian gulf!
Murphy:
Click Here![^]
I'm thirsty like sun, more landless than wind...
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Cristina,
Is there a good reason to use public variables/fields? Are these private internal classes of another class?
-Jeff
here, bloggy bloggy
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Clear the list, or the checks?
chkList.Items.Clear();
The following removes all the checks:
foreach (int index in chkList.CheckedIndicies)
chkList.SetItemChecked(index, false);
Ian Mariano - Bliki | Blog
"We are all wave equations in the information matrix of the universe" - me
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How to close an Task Manager window which is already open. Is there a way to get the process id of the Task Manager and end it?
Anykind of help is highly appreciated.
CHEERS
I.T. D.U.D.E
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Hit escape 
Use FindWindow to locate the window and send it a WM_KEYDOWN with VK_ESC.
Ian Mariano - Bliki | Blog
"We are all wave equations in the information matrix of the universe" - me
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Or just use something like this, which is all managed code:
Process[] procs = Process.GetProcessesByName("taskmgr");
if (procs != null)
foreach (Process proc in procs)
proc.Kill();
Microsoft MVP, Visual C#
My Articles
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I try to avoid Killing processes unless it's a last resort.
To quote MSDN: "Data edited by the process or resources allocated to the process can be lost if you call Kill. Kill causes an abnormal process termination and should be used only when necessary."
The task manager opens handles to the performance counters amongst other things. Just Killing it may not release them cleanly. Latter versions of Windows are better at handling reclaiming such resources, but I feel it's better to play nice.
Ian Mariano - Bliki | Blog
"We are all wave equations in the information matrix of the universe" - me
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There's always Process.CloseMainWindow. The idea is to avoid P/Invoking when possible since it can help lead to more portable code. It was an example and I would hope that for most code samples I post they just don't take them as-is - the ol' copy and paste. I try to teach people, not hand them the answers so they can continue their pursuit in ignorance. You may a good point, though.
Microsoft MVP, Visual C#
My Articles
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Yes, and I believe that TaskMan.exe is a well-formed Windows app.
Process.CloseMainWindow (MSDN) "in a well-formed application, closes child windows and revokes all running message loops for the application. The request to exit the process by calling CloseMainWindow does not force the application to quit...The behavior of CloseMainWindow is identical to that of a user closing an application's main window using the system menu. Therefore, the request to exit the process by closing the main window does not force the application to quit immediately."
Ian Mariano - Bliki | Blog
"We are all wave equations in the information matrix of the universe" - me
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Can somebody tell me how to Unregister a Service Process so that its name is not displayed in the TaskManager Process List. I required the solution for Windows XP platform. For Win9x platform, we can do it with RegisterServiceProcess API supported by Kernel32.dll. But the same thing is not working with WindowsXP since kernel32.dll doesnot support this API or It does not have this entry point.
Is there some other way to implement this.
CHEERS
I.T. D.U.D.E
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