C# Discussion Boards - CodeProject

Besinci25-Dec-06 23:58

25-Dec-06 23:58

Hi,

How or is it possible to declare a class inheritet from System.ComponentModel.Component as abstract and still be able to use the VS.designer??

/besinci

Re: How or is it possible...??

Nader Elshehabi26-Dec-06 7:55

Nader Elshehabi

26-Dec-06 7:55

Abstract classes can't be instantiated. How do you think you would put an instance of your class in the designer?

Short answer: No.

Regards

Re: How or is it possible...??

Besinci26-Dec-06 8:36

Besinci

26-Dec-06 8:36

The problem is..
-When inherited from the base class that is defined as abstract; The designer wants to call the default contructor of the base class (there is no problem using the inherited class in the designer).. but it can't as you also mentioned..

-My question was about some how to awoid the designer to call the deafult contructor of the base class..

Regards, /Besinci

Re: How or is it possible...??

Nader Elshehabi26-Dec-06 18:24

Nader Elshehabi

26-Dec-06 18:24

If I understood you right, you want to inherit a class from Component, make it abstract, then inherit more from this class. Right?
Component => Base abstract class => Inherited class
ans when you put the inherited component in the designer, you are getting an error because of the abstract class.
Well, instead of making your class as abstract, you can declare the constructor as protected. This way your base class won't be instantiated, yet any inherited class can call that constructor in the designer.
I hope I got you right this time.

Regards

Search in TreeView control

Maddie from Dartford25-Dec-06 22:37

Maddie from Dartford

25-Dec-06 22:37

Hi,
I am using TreeView control in form application of VS2005.
I want that whenever i add node to a parent node, it should check that if the node is already existing in the parent then it will be replaced otherwise be added.

So how we do search for child nodes for a particular node(parent).

RootNode
Node1
Child1
Child2
If i am adding child2 to Node1 then it should replace the existing.

thanks

Gajesh
Pune(India)

Styled ScrollBar [modified]

MHASSANF25-Dec-06 21:47

MHASSANF

25-Dec-06 21:47

How can i have a Styled ScrollBar For TextBox
for example How can i set scrollbar color or width ??

With Thanks

MHF

-- modified at 3:57 Tuesday 26th December, 2006

(Modify)Error while Displying the Report using Command SQL (Modify)

jaganil25-Dec-06 20:35

jaganil

25-Dec-06 20:35

Hi All
I am created crystal Report By using Command SQl ( by selecting ADD Command on the Database Expert-> Create new connection -> Rose | [Rose]

Add Command

I have two problem

1) If I Eable the Logon Promt (i.e EnableDatabaseLogonPrompt ="true" )

then following promt is display Before the Report View and Asked for the server passward if i enter passward then Report is Display otherwise not ( Rose | [Rose]

It's Happen 1 st time when aplication is run) the promt is given below in bold letter

The report you requested requires further information.

___________________________________________________________________

SERVER
Server name: Server
Database name: ERPDB
User name: sa
Password: --------
Use Integrated Security

2) If I disable the Logon promt (i.e EnableDatabaseLogonPrompt ="false")

then following Error Message is Display and Report Can not Display

Logon failed. Details: ADO Error Code: 0x Source: Microsoft OLE DB Provider for SQL Server Description: Login failed for user 'sa'. SQL State: 42000 Native Error: Error in File C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\SalaryReport {4244492D-0548-4110-AF32-9A9E5066CD0E}.rpt: Unable to connect: incorrect log on parameters.

Rose | [Rose]

My Actual problem to Display the Report Without Asking Server Passward to User Because User Don't Know the Server Passward Rose | [Rose]

Please any one Help me

Thanks for Your Time

Rose | [Rose]

Anil Jagdale

Error while Displying the Report using Command SQL

jaganil25-Dec-06 20:34

jaganil

25-Dec-06 20:34

Hi All
I am created crystal Report By using Command SQl ( by selecting ADD Command on the Database Expert-> Create new connection -> Rose | [Rose]

Add Command

I have two problem

1) If I Eable the Logon Promt (i.e EnableDatabaseLogonPrompt ="false" )

then following promt is display Before the Report View and Asked for the server passward if i enter passward then Report is Display otherwise not ( Rose | [Rose]

It's Happen 1 st time when aplication is run) the promt is given below in bold letter

The report you requested requires further information.

___________________________________________________________________

SERVER
Server name: Server
Database name: ERPDB
User name: sa
Password: --------
Use Integrated Security

2) If I disable the Logon promt (i.e EnableDatabaseLogonPrompt ="true")

then following Error Message is Display and Report Can not Display

Logon failed. Details: ADO Error Code: 0x Source: Microsoft OLE DB Provider for SQL Server Description: Login failed for user 'sa'. SQL State: 42000 Native Error: Error in File C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\SalaryReport {4244492D-0548-4110-AF32-9A9E5066CD0E}.rpt: Unable to connect: incorrect log on parameters.

Rose | [Rose]

My Actual problem to Display the Report Without Asking Server Passward to User Because User Don't Know the Server Passward Rose | [Rose]

Please any one Help me

Thanks for Your Time

Rose | [Rose]

Anil Jagdale

Error while Displying the Report using Command SQL

jaganil25-Dec-06 20:32

jaganil

25-Dec-06 20:32

Hi All
I am created crystal Report By using Command SQl ( by selecting ADD Command on the Database Expert-> Create new connection -> Rose | [Rose]

It's Happen 1 st time when aplication is run) the promt is given below in bold letter

The report you requested requires further information.

___________________________________________________________________

SERVER
Server name: Server
Database name: ERPDB
User name: sa
Password: --------
Use Integrated Security

2) If I disable the Logon promt (i.e EnableDatabaseLogonPrompt ="true")

then following Error Message is Display and Report Can not Display

Logon failed. Details: ADO Error Code: 0x Source: Microsoft OLE DB Provider for SQL Server Description: Login failed for user 'sa'. SQL State: 42000 Native Error: Error in File C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\SalaryReport {4244492D-0548-4110-AF32-9A9E5066CD0E}.rpt: Unable to connect: incorrect log on parameters.

Rose | [Rose]

My Actual problem to Display the Report Without Asking Server Passward to User Because User Don't Know the Server Passward Rose | [Rose]

Please any one Help me

Thanks for Your Time

Rose | [Rose]

Anil Jagdale

Opening the folder of a file

kkadir25-Dec-06 20:25

kkadir

25-Dec-06 20:25

Hello everyone,

How can I make the folder containing my file to open programmatically ?

When a user selects a file from my program and click "got to folder" in contextmenu the explorer will open the folder (not my application)..

Thanx for your helps and best regards..

.:: Something is Wrong ::.

Re: Opening the folder of a file

mav.northwind25-Dec-06 20:42

mav.northwind

25-Dec-06 20:42

Hello!
You can use the class Process for this:

Process.Start("explorer /e,"+Path.GetDirectoryName(myFileName));

Regards,
mav

--
Black holes are the places where God divided by 0...

Re: Opening the folder of a file

kkadir25-Dec-06 21:00

kkadir

25-Dec-06 21:00

Thank u very much.. It works for me but still have a problem Frown | :(

... When the folder opens I want to make my file selected. Is this possible ?

Best Regards..

.:: Something is Wrong ::.

Re: Opening the folder of a file

Ravi Bhavnani25-Dec-06 21:57

Ravi Bhavnani

25-Dec-06 21:57

explorer /select,c:\myfile.txt

/ravi

This is your brain on Celcius
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Merging of two datasets

KishoreT25-Dec-06 20:25

KishoreT

25-Dec-06 20:25

I have merged two datasets using "Dataset.Merge" command, which the data is retrived from two different dBase-III databases of same structure.

Can I create a new database of using dataset, if yes, how...?

Regards,
Kishore.

Re: Merging of two datasets

Nader Elshehabi26-Dec-06 7:23

Nader Elshehabi

26-Dec-06 7:23

KishoreT wrote:
an I create a new database of using dataset

Yes. You simply use ADO .Net classes to handle these operations. You'd need to make a ConnectionString to the Database provider -in your case dBaseIII- using OleDbConnection class, and use SQL commands -eg. CREATE TABLE-. You can call the commands using OleDbCommand class.

Regards

Migration of dBaseIII to MS-Access using C#

KishoreT25-Dec-06 20:07

KishoreT

25-Dec-06 20:07

I need to migrate dBaseIII databases to Ms-Access tables.
dBaseIII database are to be imported to MS-Access and also need export MS-Access tables to dBase III databases.

All these operations should be done using C#.

can any one help me...

Regards,
Kishore.

Re: Migration of dBaseIII to MS-Access using C#

Paul Conrad26-Dec-06 16:34

Paul Conrad

26-Dec-06 16:34

KishoreT wrote:
I need to migrate dBaseIII databases to Ms-Access tables.
dBaseIII database are to be imported to MS-Access and also need export MS-Access tables to dBase III databases.

All these operations should be done using C#.

With your C# program, load the data from the dBaseIII and then insert into Access...Pretty straight forward.

Some people have a memory and an attention span, you should try them out one day. - Jeremy Falcon

How to get recent files

ravichandratbv25-Dec-06 19:37

ravichandratbv

25-Dec-06 19:37

How to get recent file names like mspaint file menu

ravi

Re: How to get recent files

Stefan Troschuetz25-Dec-06 21:21

Stefan Troschuetz

25-Dec-06 21:21

There is no such built-in functionality if that's what you're asking for. You have to keep track of the files yourself by storing their paths somewhere (application settings, custom XML file, ...) and built the recent files menu dynamically on this basis whenever it pops up.

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

www.troschuetz.de

Re: How to get recent files

ravichandratbv26-Dec-06 0:28

ravichandratbv

26-Dec-06 0:28

RegistryKey rk = Registry.LocalMachine.OpenSubKey(@"D:\Users\Ravi\CVS-WD\training\Ravi\DataBaseProjects\NotePadSimulation\Paint\RecentFiles");

Thanks For Information ..i want to know how i can apply RegistryKey Concept to my Problem Requirement..and in the above statement i have to specify my project destination url or what i have to specify as string ..please give me some solution for me.. Frown | :(

ravi

How to Refresh previous page when next page is close

jaganil25-Dec-06 19:09

jaganil

25-Dec-06 19:09

Hi All

How to Refresh previous page when next page is close

i.e I am open next page(next.aspx) by cliking on Button of previous page
(prev.aspx) but I need to Reexcute (prev.aspx) Page_Load() function after closing the next.aspx How can do it , Anyone Help me

Rose | [Rose]

Thanks for Your Time Rose | [Rose]

Anil Jagdale Rose | [Rose]

jaganil_phoenix@yahoo.com
Rose | [Rose]

anil.jagdale@eway-software.com

Dynamic Crystal report generation

shivabj25-Dec-06 18:51

shivabj

25-Dec-06 18:51

Hi Friends,

I need some help on crystal Reports, Actully my application requirement is to generate the dynamic columns in the crystal reports . Columns will depends on the events on the windows form.(its in c#.net)

pls if u have any solution let me know

Thanks

Shivraj

shiva

Re: Dynamic Crystal report generation

shaz jazz26-Dec-06 0:14

shaz jazz

26-Dec-06 0:14

i haven't worked on it but i have heared that columns can be dyanamically created in cross tab reports but i am not sure u may search it further
thanks Smile | :)

How to read XML file from end/last using filestream pointer

Praveen Raghuvanshi25-Dec-06 18:44

Praveen Raghuvanshi

25-Dec-06 18:44

I have an XML file that contains lot of records.
For performance reasons, i wanted to read the file using filestream and streamreader. Also, it should read from the last. I need to retrive latest records.
How to move to previous line??

Thanks in advance

Praveen Raghuvanshi
Software Engineer,

Re: How to read XML file from end/last using filestream pointer

Nader Elshehabi26-Dec-06 7:28

Nader Elshehabi

26-Dec-06 7:28

Previous line wouldn't work directly. You can seek reversely byte by byte until you read a New Line character. This way you'd know that the last line has ended, and now you are in the previous line.

But this is very tedious. Are you sure you can't just use XPath to get your nodes?

Regards

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