Re: XML Reader/Writer - C# Discussion Boards

Christian Graus10-Dec-07 23:57

Christian Graus

10-Dec-07 23:57

XmlDocument doc = new XmlDocument();
doc.Load("c:\myXML");

XmlNode node = doc.SelectSingleNode("//Station2_IP_Number");

MessageBox.Show(node.InnerText);

node.InnerText = "whatever";
doc.Save();

Something like that. Read up on XPath and the XmlDocument class.

Christian Graus - Microsoft MVP - C++

"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 )

half-life11-Dec-07 0:05

half-life

11-Dec-07 0:05

TANKS A LOT Smile | :)

Have Fun
Never forget it

andypaxo10-Dec-07 23:59

andypaxo

10-Dec-07 23:59

In .NET, have a look at the System.Xml namespace.

You can use XmlDocument.Load() to read your document in, and XmlNode.SelectSingleNode() to find the element you are looking for using XPath (such as "//Station2_IP_Number"). XmlElement.InnerText will get you to the content of that node.

For reference, look up System.Xml on MSDN, and try http://w3schools.com for help on stuff like XPath.

Stevo Z11-Dec-07 0:30

Stevo Z

11-Dec-07 0:30

Hi,

correct me if I'm wrong but I don't think that you can change anything with XML reader/writer. It is a one way mechanism of reading/writing text formated in XML style. Only way how to do that is to use a reader to read the elements and implement some logics to write same or different value depending of what you want...

Example:

// Create an instance of XmlTextReader and call Read method to read the file
using (XmlTextReader reader = new XmlTextReader("C:\\books.xml"))
{
    while (textReader.Read())
    {
       Console.WriteLine("Name[{0}] Type[{1}] = Value[{2}]", reader.Name, reader.NodeType, reader.Value);
    }
}

Easiest way and probobly the slowest (to get some hierarchy) is to use the XmlDocument class, find apropriate node and change it's value. It depends on how big you suppose the xml text will be...

zilo

datagridview cell validation

half-life11-Dec-07 1:20

half-life

11-Dec-07 1:20

THANKS

Not Big,

Maybe 7 Atrr
The purpose is to let Setup.ini File "DIE"
and start using xml (Because .Net C# support XML but not Ini)
if u realy want to use ini, u need to use system32.dll do extract the method and so on...

Have Fun
Never forget it

arkiboys10-Dec-07 23:44

arkiboys

10-Dec-07 23:44

hi,
I have allowed the users to enter data into the cells of one column only.
This is a price column so only prices can be entered. i.e. 123.4322 and no alphabets.
Do I validate the cell in _cellvalidating or _cellvalidated or cell_Leave events? If so, how do I do this please?
Thanks

Re: datagridview cell validation

CKnig11-Dec-07 0:25

Re: datagridview cell validation

11-Dec-07 0:25

Do it in the "validating"-event

arkiboys11-Dec-07 0:32

arkiboys

11-Dec-07 0:32

Solved. Thanks

size of an empty class

.NET- India 10-Dec-07 23:26

10-Dec-07 23:26

The size of an empty class is 1 byte but it may be different 2 or 4 on other OS.

m i right
correct me if i'm wrong

CKnig10-Dec-07 23:28

10-Dec-07 23:28

To be ernest: I don't know but I doubt it (why do you need to know?) - but you can use the Marshal.SizeOf method to find out.

.NET- India 10-Dec-07 23:31

10-Dec-07 23:31

Can u explain it?

CKnig10-Dec-07 23:38

10-Dec-07 23:38

Ok:

<br />
<br />
class App<br />
{<br />
   public static void main()<br />
   {<br />
      System.Console.WriteLine("empty class has " + <br />
           System.Runtime.InteropServices.Marshal.SizeOf(typeof(Empty)).ToString() + <br />
           " bytes.");<br />
   }<br />
}<br />
<br />
class Empty<br />
{}<br />
<br />

Please refer to the help for more info on Marshal!

.NET- India 10-Dec-07 23:47

10-Dec-07 23:47

Friend it's throwing the following error

Type 'Empty' cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed.

CKnig10-Dec-07 23:54

10-Dec-07 23:54

Sorry - didn't try - seems the compiler just skips the Empty class.

.NET- India 11-Dec-07 0:03

11-Dec-07 0:03

Does not matter....

Can u let me one another question.....

Total Namespaces and Classes supported by .NET Framework

pmarfleet11-Dec-07 2:36

pmarfleet

11-Dec-07 2:36

Are you still flogging this dead horse of a question? Sleepy | :zzz:

What does it matter how many classes/namespaces there are? Your time would be better spent learning how to use them rather than counting them.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

DataTable.Select() finding data in all columns...

Christian Graus10-Dec-07 23:56

Christian Graus

10-Dec-07 23:56

This is C#, on a different OS, you must be using Mono. So what ? I believe you keep asking about this, why are you asking ?

thecodedemon10-Dec-07 22:12

thecodedemon

10-Dec-07 22:12

I'm trying to search a DataTable, with .Select(), to find all rows with a certain string in any of the columns.I basically want to match a string *string* with the data in any of the columns in a particular table. I've tried, simply,

table.Select( "'*' LIKE '*" + searchTerm + "*'" )

and while that runs with no errors, it also returns nothing. Had one idea, it's selecting fom all columns, but all columns do not have the sarchTerm, thus nothing returns. How can I tell it to return rows where ANY column has the searchTerm, while not excluding because the other columns do not have the searchTerm?

A soft glow comes from the pit in the darkness.
The clicking noise become faster - and louder.
A wind begins to stir up from the pit, as the
creature flexes it's wings, preparing for flight.
You stare into the pit, and hear a voice say
in your mind, "If you survive the encounter,
declare it to the world."

The Code Demon Rises.

Re: DataTable.Select() finding data in all columns...

CKnig10-Dec-07 23:18