Object pooling in C# - C# Discussion Boards

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Re: Changing all cursor types on a form

Polis Pilavas15-Dec-05 3:41

Polis Pilavas

15-Dec-05 3:41

Assuming you are trying to change the cursors from within the form that the textboxes are on, you can try something like this:

foreach (Control tmp in this.Controls)
	if (tmp is TextBox)
		tmp.Cursor = Cursors.Hand;

Or like this:

foreach (Control tmp in this.Controls)
	if (tmp.GetType().Name == "TextBox")
		tmp.Cursor = Cursors.Hand;

Regards,
Polis

Can you practice what you teach?

Re: Changing all cursor types on a form

fracalifa15-Dec-05 5:50

fracalifa

15-Dec-05 5:50

Thank's

that's what I'm looking for.

Frank

Extend NumericUpDown

yala15-Dec-05 1:43

yala

15-Dec-05 1:43

I would like to use a NumericUpDown and add the unit (feet, ...) after the number.
This is made by extending the NumericUpDown class and overriding the UpdateEditText method like that:
protected override void UpdateEditText()
{
//Let the base component format the number according to the different properties
base.UpdateEditText();
//Add the unit
base.ChangingText = true;
base.Text = base.Text + " " + unit;
base.ChangingText = false;
}

But the problem is when a user change a part of the text in the textbox,
the ParseEditText method cannot parse a string like "2 feet",
and i cannot override this method like it is not virtual or abstract in the base class (Why did Microsoft do that?).

Please help me to find a solution.

Thanks in advance

Database migration tool

AnonymousTwo15-Dec-05 1:34

AnonymousTwo

15-Dec-05 1:34

Hello,

I have a task to write a tool that converts the structure of a sybase database to postgre database. What are the steps I need to follow to do such converter tool? Please help with ideas and examples if possible !

Thanks

PreprocessKEy message DATAGRID column

Greeky15-Dec-05 0:40

Greeky

15-Dec-05 0:40

in my extended datagridcolumn i press tab , cursor jumps 2 cells :S

I think i can solve this problem with using PreprocessKey message but i dont know how to write code, could anyone show a sample?

Excel in C#

Mahi.Ragava15-Dec-05 0:27

Mahi.Ragava

15-Dec-05 0:27

Hi friends,

Am transforming datas from one excel file to another using OleDbReader....

While this,the datas are transferred but the datatypes couldnt be...

How can i do it?

Am using OleDbReader to read the tableschema.....

Kindly Help.....

Thanx....

event handling

Ankit Aneja14-Dec-05 23:34

Ankit Aneja

14-Dec-05 23:34

i am using com dll in my project which fires up event

code in vb is like this
Option Explicit
Dim WithEvents p As CLAMXLib.ClamEngine
Dim mresult As ClamResult

Private Sub p_OnScanComplete(ByVal result As CLAMXLib.IClamResult)
Set mresult = result
End Sub

in c#

CLAMXLib.ClamEngine p;
ClamResult mResult;

//now how will i catch events

code of class where i have to catch up event
public class clamresults
{
CLAMXLib.ClamEngine p;
ClamResult mResult;
public clamresults()
{
//
// TODO: Add constructor logic here
//
p=new ClamEngineClass();
p.Database.Path="E:\\projects backup\\ankitclam backup\\Clamtest\\database\\";

}
public string loadDatabase(string command,string dirpath)
{

if(command=="SCAN")
{
mResult=scanfile(dirpath);
}
else if(command=="RAWSCAN")
{
mResult=scanBuffer(dirpath);
}
else if(command=="CONTSCAN")
{
mResult=scandir(dirpath);
}

return mResult.Summary;

}
public ClamResult scandir(string dirpath)
{
p.Settings.ScanSupport=ClamSupport.Scan_Standard;
mResult= p.ScanDirectory(dirpath,0,ClamBoolType.False ,ClamBoolType.True);
return mResult;

}
public ClamResult scanfile(string dirpath)
{
p.Settings.ScanSupport=ClamSupport.Scan_Standard;
mResult=p.ScanFile(dirpath,ClamBoolType.True);
return mResult;

}
public ClamResult scanBuffer(string dirpath)
{
mResult=p.ScanBuffer(dirpath,ClamBoolType.False);
return mResult;
}

}

now how and where i will catch up events which will be generated from com dll

Ankit Aneja
"Nothing is impossible. The word itself says - I M possible"

-- modified at 6:23 Thursday 15th December, 2005

Object pooling in C#

rana7414-Dec-05 23:07

rana74

14-Dec-05 23:07

We have a c# object being referred to by ASP.NET application.We want to implement an object pool for the C# component,with the number of intances being configurable.
Assuming that ASP.NET is servicing requests in 25 concurrent threads,we want the services to be processed by the instances from the pool.
Moreover ,the instances are initialized right at the beginning.How do we implement this object pooling?
We need this architecture as the c# object contains a handle to a COM component which has a very expensive initialization process.
A pointer to a reference article will be very helpful

Re: Object pooling in C#

S. Senthil Kumar15-Dec-05 4:50

S. Senthil Kumar

15-Dec-05 4:50

Does this[^] help?

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Time out exception

manojk_batra14-Dec-05 22:51

manojk_batra

14-Dec-05 22:51

Dear All,

Dear All,

I made a webservice, which takes more than 70 seconds to compute something. When I simply run the webservice it returns me the result. But when I access it through application(C# window), it raise TIMEOUT exception.

I also tried via increasing the timout value for sessionState element but not able to solve the problem.

Smile | :)

With Regards
Manoj

Re: Time out exception

Guffa15-Dec-05 1:27

Guffa

15-Dec-05 1:27

Change the timeout for the object that handles the webservice call. It's the timeout for the web request, not the session timeout.

---
b { font-weight: normal; }

Re: Time out exception

manojk_batra15-Dec-05 1:50

manojk_batra

15-Dec-05 1:50

Dear Guffa,

I tried by increasing the
httpRuntime's executionTimeout to 1300, still its not working. Smile | :)

Thanks & Regards
Manoj

Re: Time out exception

Guffa18-Dec-05 1:29

Guffa

18-Dec-05 1:29

No, not the execution timeout, the web request timeout.

---
b { font-weight: normal; }

Re: Time out exception

manojk_batra18-Dec-05 17:42

manojk_batra

18-Dec-05 17:42

Dear Guffa,

Thanks you a lot for giving the solution. Actually your First reply given the solution, which I had not understood . Now I got what you were saying.

Cry | :((

I am really sorry, i was not able to understand.
Laugh | :laugh:

Thanks Thanks you a lot for the solution
Manoj

question

eyalso14-Dec-05 22:45

eyalso

14-Dec-05 22:45

i need example in C# + SQL SERVER

i want to insert into the DB date and time

for example 12/15/2005 and time 10:05 AM

how can i define the sqlcommand

and lets say in the DB table test i have the colum d as datetime and
t as timestamp

eyalso

Re: question

albCode14-Dec-05 22:50

albCode

14-Dec-05 22:50

string ins = "insert into table values('" + "2005.12.15 10:05 AM" + "')"

SqlDataAdapter da= new SqlDataAdapter (ins,SqlConnection);

replace DateTime with varchar ur column in ur table

Regards

-- modified at 4:51 Thursday 15th December, 2005

Re: question

J4amieC15-Dec-05 0:28

J4amieC

15-Dec-05 0:28

seferi wrote:
replace DateTime with varchar ur column in ur table

Thats easily the worst advice ive read here! DONT use varchar to store a date!

Also, to THE OP - Timestamp is a special type of binary column, and is not used to store time as the name does imply. To store date and time just create a Date column, which will store a date and time perfectly.

Remember to use parameterized queries (for dates especially as the command will take care of inserting the date correctly)

Re: question

Gilad Kapelushnik17-Dec-05 23:35

Gilad Kapelushnik

17-Dec-05 23:35

Instead of storing a DateTime variable store a long (8 byte).

convert the DateTime variable to a long by:

DateTime A = <sometime>;
long B = DateTime.Ticks;

in order to convert the long number back to DateTime do:

DateTime AA = DateTime.MinValue + TimeSpan.FromTicks(B);

Enjoy

Gilad.

Datatypes in Excel Sheet

Mahi.Ragava14-Dec-05 22:41

Mahi.Ragava

14-Dec-05 22:41

installing application to a server

bwagz14-Dec-05 22:40

bwagz

14-Dec-05 22:40

Hi,

I was wondering how a c# application can be installed and ran from a server. Allowing the application to be shared among a networks client pc's. The application i created contains registry information required for program execution.

Thanks for any help

Brian

date validity

fmardani14-Dec-05 22:38

fmardani

14-Dec-05 22:38

In a textbox a date is entered.
How can you check if this is a valid date or infact a date at all?
Thanks

Re: date validity

tatchung14-Dec-05 23:12

tatchung

14-Dec-05 23:12

i believe u can do this with regex though im cluless what its coresponding regex term is. try to google it Blush | :O

Aim small, miss small...

Re: date validity

Polis Pilavas15-Dec-05 2:17

Polis Pilavas

15-Dec-05 2:17

You can do that quite easily by writing your code inside a try/catch block like below:

try
{
	DateTime <code>tmp</code> = DateTime.Parse(this.textBox1.Text);
}
catch (Exception exc)
{
	MessageBox.Show("This is not a valid date\n\nError Message: " + exc.Message);
	return;
}
MessageBox.Show("Date is valid");

Regards,
Polis

Can you practice what you teach?

How to add a TextBox control into a ToolBar?

Andrew010514-Dec-05 22:22

Andrew0105

14-Dec-05 22:22

Dear all:
How could I add a TextBox control into a ToolBar control in VS.NET 2003? The purpose is to generate a toolbar which is like the AddressBar in IE.

Please give me a hand. Thanks a lot. Blush | :O

Andrew

-- modified at 5:40 Thursday 15th December, 2005

Re: How to add a TextBox control into a ToolBar?

albCode14-Dec-05 22:37

albCode

14-Dec-05 22:37

Right click in WindowsForms then click Add/Remove Items, the window Customize Toolbox appear then find TextBox and check it finally click OK button.

I dont know if this is answer of ur question, cuz i wasnt understand clearly ur question.

Hope this helps u

-- modified at 4:37 Thursday 15th December, 2005

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