Re: xml - C# Discussion Boards

s_123451-Mar-07 1:34

1-Mar-07 1:34

Hi,
I have one c# application in which I am using a DirListBox control.Its working finely but I am not getting a way for retrieving the elements of the control.Like - If I want some ith element from the DirListBox to compare it with some string and then continue with some action.Any idea would be helpful to me.

Events in an interface

jdkulkarni1-Mar-07 1:10

jdkulkarni

1-Mar-07 1:10

One simple question,
if an event is declared like a field of delegate type, except that the keyword event precedes the event declaration how can an interface contain a type declaration?

Jayant D. Kulkarni

Re: Events in an interface

Stefan Troschuetz1-Mar-07 2:36

Stefan Troschuetz

1-Mar-07 2:36

jdkulkarni wrote:
how can an interface contain a type declaration?

It can't. An interface can only contain signatures of the following members: Methods, Properties, Indexers and Events. (interface (C# Reference)[^]

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

www.troschuetz.de

Re: Events in an interface

jdkulkarni1-Mar-07 4:50

jdkulkarni

1-Mar-07 4:50

Yes, thats right. But I can not have
delegate void MyDelegate();
but I can have
event MyDelegate MyEvent;
I am asking @ this scenario.

Jayant D. Kulkarni
Brainbench Certified Software Engineer in C#, ASP.NET, .NET Framework and ADO.NET

Re: Events in an interface

Stefan Troschuetz1-Mar-07 5:07

Stefan Troschuetz

1-Mar-07 5:07

jdkulkarni wrote:
But I can not have
delegate void MyDelegate();
but I can have
event MyDelegate MyEvent;
I am asking @ this scenario.

And you have (more or less) already answered yourself. The first is simply not possible, since an interface can only contain signatures of the following members: Methods, Properties, Indexers and Events; and this delegate void MyDelegate(); declares a type that references a method.

PopUp Block Detection

babutkchn1-Mar-07 0:36

babutkchn

1-Mar-07 0:36

Hi All,

Greetings. I need to detect pop block status and have to display in my appilcation. I used the following code for it.

<br />
function detectPopupBlocker() <br />
{<br />
  var myTest = window.open("about:blank","","directories=no,height=100,width=100,menubar=no,resizable=no,scrollbars=no,status=no,titlebar=no,top=0,location=no");<br />
  if (!myTest) {<br />
    alert("A popup blocker was detected.");<br />
  } else {<br />
    myTest.close();<br />
    alert("No popup blocker was detected.");<br />
  }<br />
}<br />

but its not working.it is working only for else part for both popup ON and OFF. Can any one of you tell me a solution to solve this issue.

Thanks in Advance
babu

xml

md_refay1-Mar-07 0:30

md_refay

1-Mar-07 0:30

i want to write some variables values to an xml file
then
read these files into local variables into myapplication from xml file

ma_refay

Re: xml

Stefan Troschuetz1-Mar-07 0:48

Stefan Troschuetz

1-Mar-07 0:48

Take a look at the classes in the System.Xml namespace especially XmlDocument, XmlTextReader and XmlTextWriter.

dimension array

md_refay1-Mar-07 0:27

md_refay

1-Mar-07 0:27

i have about 30 image on my form
5 images per row
i want to store the image_row & image_no in array
so i want 2 dimension arrayto store image position in that way
0,0 first row & first image
2,4 third row & fifith image
and so on

ma_refay

Re: dimension array

Martin#1-Mar-07 0:32

Martin#

1-Mar-07 0:32

Hello,

You could use an ArrayList or Hashtable and Add another ArrayList or Hashtable or ImageArray to each member.

All the best,

Martin

Best way of generating a lookup table

mail5723521-Mar-07 0:13

mail572352

1-Mar-07 0:13

Hi,

I have to store a list as an external file of part codes and corresponding descriptions for later retrieval by other applications. What's the best way of doing it?

Each entry in the list consists of two strings, a part code and a description. I could just write to a text file and read from it again or should I use XML? Anyone have any ideas or examples of how to implement such code?

Thanks Smile | :)

Re: Best way of generating a lookup table

Stefan Troschuetz1-Mar-07 0:47

Stefan Troschuetz

1-Mar-07 0:47

Personally, I always favor XML over a plain text file. First, you can define an additional schema that allows you and other applications to easily validate whether the XML file contains data in a valid format. Second, you can use XPath to easily lookup the description for a part code. Finally, you are probably able to use the XmlSerializer class to easily create the Xml file in your application; depends on the way the you implemented the list to be stored in your application.?

Re: Best way of generating a lookup table

thowra1-Mar-07 22:29

thowra

1-Mar-07 22:29

Use XmlTextWriter.

For part key pairs, try this:

<code>XmlTextWriter </code>writer = new <code>XmlTextWriter</code>(_PartsListFilename, null);
writer.<code>Formatting </code>= Formatting.Indented;
writer.<code>WriteStartElement</code>("parts");
foreach ( <item> )
{
	    writer.<code>WriteStartElement</code>("part");
	    writer.<code>WriteElementString</code>("Code", <item>.Code);
	    writer.<code>WriteElementString</code>("Description", <item>.Description);
	    writer.<code>WriteEndElement</code>();
}
writer.<code>WriteEndElement</code>();
writer.<code>Close</code>();

Evil cannot be conquered in the world... It can only be resisted within oneself.

Returning values

scotlandc1-Mar-07 0:11

scotlandc

1-Mar-07 0:11

Hi,

I hope someone can help.

I have to import some data from a text file into a database. The text files are loaded into a datagrid to be previewed and validated before being imported.

There are some conditions to the import, each child record must have a pre-existing parent record before it will be imported etc. The validation is handled in a stored procedure.

What I need to do is return all of the values that have failed to import in a collection.

public ItemEventCollection failures = null;
...
public ItemEventCollection EventImport(SecurityContext sc, ItemEventCollection EventCollection)
{
if (EventCollection != null)
{

foreach (ItemEvent itemEvent in EventCollection)
{
try
{
ItemEventInsertCommand.Execute(DataAccessManager(sc), itemEvent);
}

catch
{
failures.Add(ItemEvent);
}

}
}

return failures;

}

If I step through the code, failures always has a count of 0 when I know there are rows failing the import conditions. I need to add them to failures then pass it back to a datagrid.

How?

Do I use the out keyword or simply return the ItemEventCollection, I'm really stumped on this one, please can someone help?

Best regards

Scott Wink | ;)

asp.net for google map

Member 387693428-Feb-07 23:37

Member 3876934

28-Feb-07 23:37

i am gettting the error message saying that "the google api map key used for this site is registered for different site. also please guide me for coding part,i dnt know what changes should i do in order to be able to view google map written in Frown | :(

asp.net.

how to check if object exists?

arkiboys28-Feb-07 23:30

arkiboys

28-Feb-07 23:30

How is it possible if an object exists?
At present I have a code similar to this line:

//This retrieves the object...
objectData = MethodName(Name)

If the object does not exist, it goes to the catch statement.
How can I just check if it exists so that it does not go to the catch statement?
Something like:

if (MethodName(Name) not null)
{

}
else if (MethodName(Name) == null)
{

}

Thanks

Re: how to check if object exists?

Sylvester george28-Feb-07 23:34

Sylvester george

28-Feb-07 23:34

if(objectData != null)
{
//do your codings here
}

Regards,
Sylvester G
sylvester_g_m@yahoo.com

Re: how to check if object exists?

arkiboys28-Feb-07 23:37

arkiboys

28-Feb-07 23:37

I would like to check something like:
if (methodname(name) != null)

Is this possible?

Re: how to check if object exists?

Sylvester george28-Feb-07 23:39

Sylvester george

28-Feb-07 23:39

yes it is possible

Regards,
Sylvester G
sylvester_g_m@yahoo.com

Re: how to check if object exists?

Tuwing.Sabado1-Mar-07 0:17

Tuwing.Sabado

1-Mar-07 0:17

Yes, but only if the returning value of MethodName is a nullable object. If not your codition is always true.

Post the snippet of MethodName...

Regards,
Mark

Re: how to check if object exists?

Martin#28-Feb-07 23:36

Martin#

28-Feb-07 23:36

What is "MethodName" doing?

Re: how to check if object exists?

arkiboys28-Feb-07 23:38

arkiboys

28-Feb-07 23:38

creates an object

Re: how to check if object exists?

Martin#28-Feb-07 23:39

Martin#

28-Feb-07 23:39

arkiboys wrote:
creates an object

How?

Re: how to check if object exists?

Stefan Troschuetz1-Mar-07 0:24

Stefan Troschuetz

1-Mar-07 0:24

objectData = MethodName(Name);
if (objectData == null)
{
  // Handle that the object does not exist
}
else
{
  // Operate on the object
}

CreateGraphics

md_refay28-Feb-07 23:15

md_refay

28-Feb-07 23:15

i want to convert button style to appear as circle
or
drawing circle on the form and event these circles

ma_refay

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