Re: file processing time - C# Discussion Boards

Peter Vertes14-Dec-04 9:04

14-Dec-04 9:04

Hello All,

I have a form that has 4 textboxes on it and a button. Initially the button is disabled but as soon as someone types/changes text in one of the text boxes I would like to enable the button. How can I detect changes in a text box ? Do I need to watch out for changes in each individual textbox or is it possible for the form to notify me that one of the textboxes changed ? Thanks in advance...

-Peter

Re: Catching Textbox changes on a form

SeMartens14-Dec-04 9:32

SeMartens

14-Dec-04 9:32

Hi Peter,

I think the simplest solution is to add one EventHandler for the KeyPress-Event for all 4 textboxes.

For example the eventhandler can look like this:

<br />
private void txtTextBox_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) {<br />
<br />
}<br />

To make sure that all 4 Textboxes calls this handler, simply click at the textbox (Forms-Designer in VS.NET) and select the flash-symbol from the properties page. There you have an entry called KeyPress and there you can select the method above.

Now you can call a method in this handler to verify the content of the textbox and do what you want with the button.

Wink | ;)

I hope this helps you.

Sebastian

P.S: Sorry for grammar and spelling...

Re: Catching Textbox changes on a form

Jay Shankar14-Dec-04 13:45

Jay Shankar

14-Dec-04 13:45

To add the posting of Mr. SeMartens. If you want to do some specific task in the keyPress event of a perticular textBox, You can easily do the same. Below example illustrate the same.

//add the event handler to the textBoxes, 
this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.TextBoxesKeyPress);

this.textBox2.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.TextBoxesKeyPress);

this.textBox3.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.TextBoxesKeyPress);

this.textBox4.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.TextBoxesKeyPress);

//
//

private void TextBoxesKeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) 
{
	// do the common processing here i.e. applicable to all the textBoxes
	//.........................
	//
	//processing for specific textBox
	//
	if(sender == this.textBox1)
	{
		//do processing relevent to textBox1 only
		//.......................
	}
	else if(sender == this.textBox2)
	{
		//do processing relevent to textBox1 only
		//............................
	}
	else if(sender == this.textBox3)
	{
			//do processing relevent to textBox3 only
			//............................
	}
	else if(sender == this.textBox4)
	{
		//do processing relevent to textBox4 only
		//............................
	}
	

}

Do revert back whether it could solve your purpose or not

C# Change XML Element content

marker2714-Dec-04 8:24

marker27

14-Dec-04 8:24

Hello guys,
This should have been simple, but im pretty stuck here.

I have an simple XML file where i want to change the content of the file. The file is as follows

config.xml

<Config>
<ReportServer>0</ReportServer>
<LastReportDate>20041214</LastReportDate>
</Config>

is there a simple way to change the content of the elements fx. <ReportServer> to a 1 instead of a 0 ??

Cheers

Ronni

Re: C# Change XML Element content

DavidNohejl14-Dec-04 10:49

DavidNohejl

14-Dec-04 10:49

yes there is simple way, use System.Xml.XmlDocument. Why don't you try XML forums?

David

Never forget: "Stay kul and happy" (I.A.)

Re: C# Change XML Element content

Daniel Turini14-Dec-04 20:17

Daniel Turini

14-Dec-04 20:17

Here's some sample code for you:

using System;
using System.Xml;

class Class1
{
	static void Main(string[] args)
	{
		string xmlpiece = @"<Config>
									<ReportServer>0</ReportServer>
									<LastReportDate>20041214</LastReportDate>
								</Config>
								";
		XmlDocument doc = new XmlDocument();
		doc.LoadXml(xmlpiece);
		XmlNode node = doc.SelectSingleNode("/Config/ReportServer");
		node.InnerText = "1";
		Console.WriteLine(doc.OuterXml);
	}
}

Yes, even I am blogging now!

file processing time

shaw12314-Dec-04 8:20

shaw123

14-Dec-04 8:20

Why my program process a file in 6 minute and if I reprocess same file, it take 6 seconds. I am runing on xp operating system.

Thank you

Re: file processing time

Dave Kreskowiak14-Dec-04 10:35

Dave Kreskowiak

14-Dec-04 10:35

"process" can mean anything! What, EXACTLY, are you talking about?

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: file processing time

Anonymous14-Dec-04 10:42

Anonymous

14-Dec-04 10:42

My program read customer file consist of 9000 records. I process each record and it takes around 6 minutes to process those records, if I re-process this file again, it will take only 6 second to process same input file. It seems like XP operating system keep every thing in memory.

Calling functions

thepersonof14-Dec-04 7:33

thepersonof

14-Dec-04 7:33

Hi I have some strings and for each one I would like to call a specific function.
eg.
bla -> func()
blah -> func2()
etc..

I know I could use a hashtable, except c# doesn't have an eval function (as far as I know). How could it be done? At the moment I've got a switch for this, but this must not be the fastest way.

Thanks

Re: Calling functions

Nick Parker14-Dec-04 15:40

Nick Parker

14-Dec-04 15:40

You should check into System.Reflection[^] namespace, in particular, look at the MethodInfo[^] class, it contains a method called Invoke[^] that will allow you to dynamically call a method based on it's name and some additional information.

- Nick Parker
My Blog | My Articles

Re: Calling functions

thepersonof15-Dec-04 10:04

thepersonof

15-Dec-04 10:04

Thanks very much, I've read a bit about it and come up with this code:

#region Using directives<br />
<br />
using System;<br />
using System.Collections.Generic;<br />
using System.Reflection;<br />
using System.Text;<br />
<br />
#endregion<br />
<br />
namespace ConsoleApplication1<br />
{<br />
    class Program<br />
    {<br />
        static void Main(string[] args)<br />
        {<br />
            Type t = typeof(Program);<br />
            object [] argsg = new object [] {100, 184};<br />
            t.InvokeMember("ComputeSum", BindingFlags.Default | BindingFlags.InvokeMethod<br />
                | BindingFlags.Static, null, null, argsg);<br />
        }<br />
        public static void ComputeSum(int num1, int num2)<br />
        {<br />
            Console.WriteLine(num1 + num2);<br />
            Console.ReadKey();<br />
            return;<br />
        }<br />
    }<br />
}<br />

Why does it generate a "MissingMethodException was unhandled" error?

Thanks again

ListView problem

Sebastien Lachance14-Dec-04 7:23

Sebastien Lachance

14-Dec-04 7:23

I have a Object that inherits from ListViewItem. However, when a add this instance to the ListView, there is no text or whatever in it. If I add a SubItem, then the second column is populated but the first still not.
How can i display the value on my ListViewItem in the first column ?.

Thanks in advance Dead | X|

Well.. later

Re: ListView problem

Hugo Migneron14-Dec-04 8:07

Hugo Migneron

14-Dec-04 8:07

When you create your ListViewItem object, the string you pass as a parameter is what will be displayed in the first column.
For example

<br />
ListViewItem item = new ListViewItem("Text that will be displayed in the first column");<br />
item.SubItem.add("Text that will be displayed in the second column");<br />

Hope this helps

Hugo Migneron

Re: ListView problem

Sebastien Lachance14-Dec-04 8:11

Sebastien Lachance

14-Dec-04 8:11

We can pass a ListViewItem to the items.add methods of the ListView, I can't pass a string since a need to put object into the listview. Sigh | :sigh:

Well.. later

Re: ListView problem

Hugo Migneron14-Dec-04 8:19

Hugo Migneron

14-Dec-04 8:19

I am not sure i understand correctly what you are saying, can you post your code?

Hugo Migneron

Re: ListView problem

Sebastien Lachance14-Dec-04 8:34

Sebastien Lachance

14-Dec-04 8:34

lstServerExplorer.Items.Clear();<br />
			foreach( XmlNode node in xn)<br />
			{<br />
				strProvider = node.ChildNodes[0].InnerText.ToString();<br />
				strServer = node.ChildNodes[1].InnerText.ToString();<br />
				strDatabase = node.ChildNodes[2].InnerText.ToString();<br />
				strUser = node.ChildNodes[3].InnerText.ToString();<br />
				strPassword = node.ChildNodes[4].InnerText.ToString();<br />
				itm = new ConnectionItem(strProvider, strServer, strDatabase, strUser, strPassword);<br />
				lstServerExplorer.Items.Add(itm);<br />
			}

Where itm is an instance of a class that inherits from ListViewItem. Eek! | :eek:

Well.. later

Re: ListView problem

Hugo Migneron14-Dec-04 8:41

Hugo Migneron

14-Dec-04 8:41

I would say you should call the base ListViewItem constructor in the ConnectionItem consctuctor.

public ConnectionItem(strProvider, strServer, strDatabase, strUser, strPassword):base([whatever you want to display in your first column])

Hope this helps!

Hugo Migneron

Re: ListView problem

Sebastien Lachance14-Dec-04 8:51

Sebastien Lachance

14-Dec-04 8:51

You helped me find the solution. I have used base.Text and it finnally work, thank you so much.;)

Well.. later

Traversing Sub Dirs

Anonymous14-Dec-04 6:51

Anonymous

14-Dec-04 6:51

I have a small app that I run on the files in the directory (pulls strings out of .resx files). I want to add a param to that app to do the sub dirs. How can I get all .resx files from the sub directories given a root directory? My guess is to use the Directory.GetDirectories but I bet I have to do it recursively right? Simpler way of doing it?

Any code samples?

Thanks
Darren

Re: Traversing Sub Dirs

Dave Kreskowiak14-Dec-04 7:10

Dave Kreskowiak

14-Dec-04 7:10

Anonymous wrote:
My guess is to use the Directory.GetDirectories but I bet I have to do it recursively right? Simpler way of doing it?

That is the simpler way of doing it. Write a function that takes a path as a parameter. This function will process all the files in that path. Then, it gets the list of subdirectories in that path and, one-by-one, calls itself with the new paths from that list.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Uppercase first letter of string

thepersonof14-Dec-04 6:36

thepersonof

14-Dec-04 6:36

hi how can i make the first letter of a string uppercase and the rest lowercase?

Thanks

Re: Uppercase first letter of string

SeMartens14-Dec-04 7:46

SeMartens

14-Dec-04 7:46

Hi,

i think the following method will be one option:

Divide the string with the substring-method into two pieces and use ToUpper() for the first part and ToLower() for the second one:

<br />
string s = "SOMETHING";<br />
s = s.Substring(0,1).ToUpper() + s.Substring(1, s.Length - 1).ToLower();<br />

Before you execute this, you must be sure that the string has at least one character.

Smile | :)

Hope, this helps you

Sebastian Martens

WMI question

zsiga14-Dec-04 5:30

zsiga

14-Dec-04 5:30

Which CIM object contains information about the current loged-in user?
Thank u for the answers!

Re: WMI question [EDITED]

Dave Kreskowiak14-Dec-04 5:44

Dave Kreskowiak

14-Dec-04 5:44

THe class is Win32_LogonSession[^], but it only works on Windows XP or above. It won't work on Windows 2000/NT/9x.

[EDIT]
Oops! Forgot the second one, Win32_LoggedOnUser[^]. But the same restrictions apply, XP and above only.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

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