C# Discussion Boards - CodeProject

Re: Namespace Extension (urgent)

~~_{lost in transition}~~ 5-Jan-07 3:34

~~_{lost in transition}~~

5-Jan-07 3:34

Be nice now, its URGENT D'Oh! | :doh:

Programmer: A biological machine designed to convert caffeine into code. * Developer: A person who develops working systems by writing and using software.
[^]

Shell Namespace Extension (urgent)

Member 26928295-Jan-07 1:31

Member 2692829

5-Jan-07 1:31

As i want to add custom folder attributes in the root folder of namespace extension. While i am using the SFGAO_HASSUBFOLDER like wise , I am getting the system folder attributes only. Instead of that i want to add my own folder attribute in the root. Say " Login As" in the root of the virtual namespace extension.
As i am quite novice in shell programming, please help me to resolve the same.

Aruna

why my datareader object of oledb in C# not properly reading

kalaveer5-Jan-07 0:46

kalaveer

5-Jan-07 0:46

i am trying to read a memo field of database using oledb datareader after executing the query like below
datareader.GetValue(0).ToString() which only reading the first 255 chars in the memo field how could i read the whole contents at a time
please help.

Re: why my datareader object of oledb in C# not properly reading

ed^nrgc5-Jan-07 1:51

ed^nrgc

5-Jan-07 1:51

What database are you using that has Memo fields?

Re: why my datareader object of oledb in C# not properly reading

~~_{lost in transition}~~ 5-Jan-07 3:40

~~_{lost in transition}~~

5-Jan-07 3:40

Sounds like MS Access. If at first you don't succed give up go play XBox Laugh | :laugh:

Try something other than a datareader. Try a datatable or if you are only intrested in on field use a SQL statement and run a OleDbCommand.ExecuteScalar();

Programmer: A biological machine designed to convert caffeine into code. * Developer: A person who develops working systems by writing and using software.
[^]

Re: why my datareader object of oledb in C# not properly reading

ed^nrgc5-Jan-07 3:59

ed^nrgc

5-Jan-07 3:59

Try something like this:

dr.Read();
FieldLen = dr[MemoCol].Length;
char[] MemoBuffer = new char[FieldLen];
int startIndex = 0;
retVal = dr.GetChars(1, startIndex, MemoBuffer, 0, MemoBuffer.Length);
Console.WriteLine(MemoBuffer);

MultiThreading

indiaone5-Jan-07 0:29

indiaone

5-Jan-07 0:29

Hi,

My XML file contains Method List.

In my application contain 2 Threads.

First Thread reading Method from XML file and starting the 1st Thread.
Second Thread reading Method from XML file and starting the 2nd Thread.

Onec which ever thread complete method it's takes next method.

this process going until all the method over.

How to do this

it's arrgent.

Plz help me out.

Re: MultiThreading

ed^nrgc5-Jan-07 3:40

ed^nrgc

5-Jan-07 3:40

If you're calling them sequentially, what's the point?

Re: MultiThreading

indiaone7-Jan-07 21:14

indiaone

7-Jan-07 21:14

It's my fault.
I have explain properly.
Basically What I want

In my program, two thread running.

Both thread taking method Name from Array and and executing.
Array containning Method Name List.
Only method name from the Array.

problem is when i m assigning like this i m getting error.

Error "strMN is a Variable but it's used like Method"

strMN getting value from the Array.

strMN is Variable Name.

Code :-

string[] strMName = strMethodName.ToString().Split(' ');
Console.WriteLine("Thread running");
for (int i = 0; i < strMName.Length; i++)
{
string strMN = strMName[i].ToString();

// create a thread for the Incrementer
Thread trdIncrementer = new Thread(new ThreadStart(strMN));
trdIncrementer.Start();

// create a thread for the Decrementer.
Thread trdDecrementer = new Thread(new ThreadStart(strMN));
trdDecrementer.Start();
}

Error "strMN is a Variable but it's used like Method"

Methods:-

///

/// demo function for Incrementer, counts up to 10.
///

public void Incrementer()
{
lock (trdIncrementer )
{
for (int counter = 0; counter < 10; counter++)
{
// assign the incrementer value and display the results
Console.WriteLine("Incrementer: {0}", counter);
}
}
}

///

/// demo function for Decrementer, counts down from 10.
///

public void Decrementer()
{
lock (trdDecrementer)
{
for (int counter = 10; counter >= 0; counter--)
{
// assign the decremented value and display the results
Console.WriteLine("Decrementer: {0}", counter);
}
}

}

help me out .

It's arrgent.

Thanks

Re: MultiThreading [What i want]

indiaone8-Jan-07 2:35

indiaone

8-Jan-07 2:35

I have two thread.

I have more than one method in the array.

I want Two thread should run side by side.
and execute methods.

Suppopse array contains four method name:

1.A
2.B
3.C
4.D
So,
First thread take A method name from the array.
Second thread take B method name from the array.

Once Any of these two thread comleted their task then it has to take next C
method from the array....

Example:-

if suppose 1st thread complete before 2nd thread. it' should take 3rd method name then 2nd thread should not take 3rd method name from the array. it should take 4th method name from the array.

Thanks

Re: MultiThreading

led mike5-Jan-07 5:10

led mike

5-Jan-07 5:10

You may want to study some on threads and synchronization for your solution. However I may be wrong because:

asif_aslam wrote:
First Thread reading Method from XML file and starting the 1st Thread.

First thread starts the first thread? I am pretty sure that cannot happen.

and...

asif_aslam wrote:
Onec which ever thread complete method it's takes next method.

We have a communication breakdown because I have no idea what that means.

led mike

Re: MultiThreading

indiaone7-Jan-07 19:56

indiaone

7-Jan-07 19:56

It's my fault.
I have explain properly.
Basically What I want

In my program, two thread running.

Both thread taking method Name from Array and and executing.
Only method name from the Array.

problem is when i m assigning like this i m getting error.

strMN is Variable Name.

strMN getting it's value from the Array.

like this.

string strMN = strMName[i].ToString();

Thread trdIncrementer = new Thread(new ThreadStart(strMN));

Error :-> "strMN is a Variable but it's used like Method"

help me out .

It's arrgent.

Thanks

Re: MultiThreading[What i want]

indiaone8-Jan-07 2:35

indiaone

8-Jan-07 2:35

Re: MultiThreading

led mike8-Jan-07 5:44

led mike

8-Jan-07 5:44

asif_aslam wrote:
string strMN = strMName[i].ToString();

Thread trdIncrementer = new Thread(new ThreadStart(strMN));

If you are trying to execute different operations in threads using configuration information (data) you are going about it all wrong. Implementing that does not require multiple thread methods.

led mike

Testing the type of data

manustone5-Jan-07 0:20

manustone

5-Jan-07 0:20

Hi all

I'm new in C# development.
I've got a function with a parameter of type object that is casted to a string to be used in it.

How to test a variable before passing it to the function? There is some function making sure that a variable I'm using is a string. What checking to do?
I need to use it also with assertion in debug code.

Regards
manuStone

Re: Testing the type of data

Russell Jones5-Jan-07 0:26

Russell Jones

5-Jan-07 0:26

2 ways depending on how you want to play it

if(myUnknownObject is string)
{
string myString = (string)myUnknownObject;
DoStuff(myString);
}

or

string myString = myUnknownObject as string;
DoStuff(myString);

the second way will leave myString as null if myString wasn't a string so you'll have to check for nulls in DoStuff, but you'd do that anyway as a string could be null. The difference is whether a null string has a significance in your application.

HTH

Russell

Re: Testing the type of data

manustone5-Jan-07 0:43

manustone

5-Jan-07 0:43

Hi Russel
thank you very much for your quick response.
Have a nice day
manuStone

Re: Testing the type of data

User 66585-Jan-07 2:09

User 6658

5-Jan-07 2:09

Additional to arachnoids second solution you may also do this:

if(obj is string)
        DoStuff((string)obj);

regards

modified 12-Sep-18 21:01pm.

System.Windows.Forms.WebBrowser and I.E. System cache

Cozumel995-Jan-07 0:19

Cozumel99

5-Jan-07 0:19

I've got a WebBrowser control and when I do a:

browser.Navigate("http://some.url")

it will work fine the first time, but a subsequent call to the same URL will ALWAYS return instantly with the locally cached copy... when what I really want it to do is a complete new download.

How do I force browser.Navigate to ignore the local system cache??

Just for grins, I tried setting:

browser.Refresh(WebBrowserRefreshOption.Completely)

just after the InitializeComponent method, hoping it would force the control to bypass the cache, but it didn't (and according to the documentation, this just does a refresh and doesn't set the DocumentCompleted event anyway...) but I couldn't find anything else that might bypass the cache and force a reload.

What am I missing?

Thanks!
-Dan

Re: System.Windows.Forms.WebBrowser and I.E. System cache

Steve Hansen5-Jan-07 2:11

Steve Hansen

5-Jan-07 2:11

You could always try to create a unique url to display.

Let's say you want to display the microsoft page (http://www.microsoft.com/en/us/default.aspx[^])

If you add a random number after it and put a ? between it. Like this:

http://www.microsoft.com/en/us/default.aspx?541231[^]

This page can never be cached because it could easily mean something to the webserver. If you page already has a ?blabla=something part then you can still do ?blabla=something&rndid.

Re: System.Windows.Forms.WebBrowser and I.E. System cache

Cozumel995-Jan-07 17:24

Cozumel99

5-Jan-07 17:24

Excellent suggestion... not sure why I didn't think of it... Big Grin | :-D

. Not real elegant, but works perfectly! Thanks for the tip and quick reply!

-Dan

how can i obtain memory and pin information of smart divice

02122534-Jan-07 23:59

0212253

4-Jan-07 23:59

Hi everybody! I want to read memory and pin information of smartphone or PDA but i don't know what function can be used in C#. I found in MSDN but it in Visual C++. Now i wonder either i can do it in C# or not. Please help me!
Thank.

execute exe file

suveenmohan4-Jan-07 23:44

suveenmohan

4-Jan-07 23:44

Hi All,
Here i want to execute an .exe file on particular button. Plz hlep

Regards:
Suveen

Re: execute exe file

slugonamission4-Jan-07 23:47

slugonamission

4-Jan-07 23:47

Process.Start(string exeName); is probably the best way. I can't remember the namespace, but it's probably in System.Diagnostics

Re: execute exe file

Christian Graus4-Jan-07 23:47

Christian Graus

4-Jan-07 23:47

PRocess.Start will start any exe for you.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

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