C# Discussion Boards - CodeProject

Dave Kreskowiak14-Dec-04 10:35

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

Re: WMI question [EDITED]

zsiga15-Dec-04 1:22

zsiga

15-Dec-04 1:22

Don't you(or anybody) know enythig else working under XP too?

Re: WMI question [EDITED]

Dave Kreskowiak15-Dec-04 2:52

Dave Kreskowiak

15-Dec-04 2:52

Using WMI, there isn't one. There 2 ways around this:

1. To write a service, installed and running on the client, that uses Win32 API function to get the same information and reports it back to a server application, either actively when anyone logs on, or when the server application poles the machine for it.

2. Write your own WMI class that provides this information and deploy it to all your clients. (Much more difficult because of a smaller documentation and example base)

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

Forms in a DLL

Jassim Rahma14-Dec-04 4:56

Jassim Rahma

14-Dec-04 4:56

How can I compile forms in a separate DLLs to make it easy to update single forms?

Any other solutions other than DLL files?

Re: Forms in a DLL

Colin Angus Mackay14-Dec-04 5:38

Colin Angus Mackay

14-Dec-04 5:38

jrahma wrote:
How can I compile forms in a separate DLLs to make it easy to update single forms?

Add a new class library project to your solution. Put the new forms in that project. Make sure you put a reference to it in your main project (the project that will make use of the forms).

Do you want to know more?
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Re: Forms in a DLL

Gary Thom14-Dec-04 5:41

Gary Thom

14-Dec-04 5:41

Look at the articles about Plugins on this site, they should give you ideas Smile | :)

Example[^]

Gary

While you're waiting, read the free novel we sent you. It's a Spanish story about a guy named 'Manual.'
- Dilbert

Preventing windows forms update

Anonymous14-Dec-04 4:43

Anonymous

14-Dec-04 4:43

Hi everyone,

I have a form that has a lot of controls in it. While it is loading, controls appear one after another, giving my app an unprofessional look.

Is there any way to prevent updating my form until it is completely loaded?

Thanks

Re: Preventing windows forms update

Daniel Turini14-Dec-04 4:51

Daniel Turini

14-Dec-04 4:51

I don't know if I understood your question correctly, as I never saw this behavior happening (and I have some test machines that are old and slow) - it may be because you're creating dynamic controls. If this is the case, you could try using SuspendLayout/ResumeLayout (if your problem is the slow layout manager) or try sending a WM_SETREDRAW message to your form to prevent it redrawing while you're updating it.
Some controls also support the BeginUpdate()/EndUpdate() while you load data to them, e.g., the ListView, ListBox, TreeView, etc.

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