C# Discussion Boards - CodeProject

Re: WinForms app which will fill textboxes on web application

Saksida Bojan11-Dec-09 7:08

Saksida Bojan

11-Dec-09 7:08

I need to warn you. Some anti virus software's can detect your application as trojan or Key logger

Re: WinForms app which will fill textboxes on web application

Abhishek Sur13-Dec-09 21:55

Abhishek Sur

13-Dec-09 21:55

mpiotrek wrote:
Thank a lot Abhishek Sur Smile

Most welcome.. Thumbs Up | :thumbsup:

Abhishek Sur
Don't forget to click "Good Answer" if you like this Solution.
My Latest Articles-->
Simplify Code Using NDepend
Basics of Bing Search API using .NET
Microsoft Bing MAP using Javascript

is it possible ?

Joe Rozario10-Dec-09 23:55

Joe Rozario

10-Dec-09 23:55

Dear frineds.

have some clarification.

is it possible to Get the "File Extension" By Using "Mime Type"?

won't there be Two extensions haveing same "mime type"

By

Joe

Re: is it possible ?

The Man from U.N.C.L.E.11-Dec-09 0:07

The Man from U.N.C.L.E.

11-Dec-09 0:07

It is not possible.

You can go the other way, from extension to mime type if you write an appropriate mapping function.

Example of a failing mime type would be text/plain which maps to .txt, .com, .conf, .cxx, .def and others. In addition many people incorrectly tag mime types and so you may get .xml, .csv, .rss and who knows what returned as text/plain!

A good list of mime types can be found at http://www.webmaster-toolkit.com/mime-types.shtml[^]

If you have knowledge, let others light their candles at it.
Margaret Fuller (1810 - 1850)
[My Articles] [My Website]

Re: is it possible ?

Joe Rozario11-Dec-09 0:12

Joe Rozario

11-Dec-09 0:12

thanks for the replay..

and for the Exact answer Big Grin | :-D

is there a way to find the "Native Application" for the "mime type"?
By

joe

windows azure

santhosh-padamatinti10-Dec-09 23:24

santhosh-padamatinti

10-Dec-09 23:24

Hi,

I am currently trying a sample on windows azure. Some where I heard that using windows azure. we can develop some mobile applications which runs plat form independently.

Can any one know about this or any samples related to this please send me..

Thanx in Advance..................

sampath-padamatinti

Re: windows azure

Abhijit Jana11-Dec-09 1:50

Abhijit Jana

11-Dec-09 1:50

sampath-padamatinti wrote:
any samples related to this please send me..

Here is one article from Codeproject
HelloAzure[^]
This may help Smile | :)

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

Re: windows azure

santhosh-padamatinti11-Dec-09 1:59

santhosh-padamatinti

11-Dec-09 1:59

Thanks for reply,

It is useful for me......

sampath-padamatinti

database

farokhian10-Dec-09 23:12

farokhian

10-Dec-09 23:12

Hi I need somebody help.
In my c# project i need primary key of the row that i insert into my table;
what should i do?
If it is necessary to write storedprocedure , how can i use it in my project?

Re: database

Covean10-Dec-09 23:25

Covean

10-Dec-09 23:25

Use a statment like this:

string szStatement = "SET NOCOUNT ON; INSERT INTO tablename (column_1, column_2, ..., column_n) VALUES(?,?, ..., ?); SELECT @@IDENTITY AS ID;";
someDatabaseCommand = new SomeDatabaseCommand(dbConnection, szStatement);
int nNewId = (int)someDatabaseCommand.ExecuteScalar();

Greetings
Covean

Re: database

PIEBALDconsult11-Dec-09 3:44

PIEBALDconsult

11-Dec-09 3:44

I use GUIDs as primary keys. When I need the key of a row I'm about to insert I create the GUID in the application with System.Guid.NewGuid() and then pass it in with the rest of the data.

I never use autoincrement fields; they're so last century.

Re: database

farokhian11-Dec-09 3:50

farokhian

11-Dec-09 3:50

Thanks alot.
Can you explain me that what is GUIDs?
How can i use it?
should i create it c# code?

Re: database

Saksida Bojan11-Dec-09 7:21

Saksida Bojan

11-Dec-09 7:21

farokhian wrote:
Can you explain me that what is GUIDs?

Globally Unique Identifier[^]

farokhian wrote:
should i create it c# code?

All you will need is to call Managed Call to create GUID

farokhian wrote:
How can i use it?

Guid.NewGUID().ToString()

Al thou I Don't recommend this approach for database. The process is very slow, and there you can get duplicates GUIDs.
I Recommend using Integer ID, With Auto_Increment options. When inserting Row, in SQL command do not specify column ID and value. It will grammatically give free ID number

Re: database

Hawks Talon11-Dec-09 7:23

Hawks Talon

11-Dec-09 7:23

GUIDs a string values used for uniqueness (example: 33b61dbd-2640-4153-8556-9cb9ad3e4a71). They are great for ensuring a unique identifier but not so great for indexing as they are string and thus cause the DB to have to do a table scan in order sort the records properly. Indentity or auto-increment field types may be old-school but they have the advantage of not needing to scan the table for ordering and thus provide much better performance for indexing. This is important because the Primary Key is an Index, the primary index in fact. The main advantage a GUID provides is with database farms. A record with a GUID will always have the same GUID but the Indentity could get reset across servers if precausons are not taken.

All that being said, I feel your original question was not answered. In order to answer your question though I would need a little bit more info as the answer could differ. How are you connecting to the DB? ADO.Net? Linq? What kind of database are you connecting to? Aceess? SQL? MySQL?

Thank you,
Eric Ritzie

Reflection Parameter Problem object[]

dataminers10-Dec-09 22:00

dataminers

10-Dec-09 22:00

I want use method in dll using with reflection.

-----------------------------------------------------------

Assembly assembly = Assembly.Load("abc.dll");
object obj = assembly.CreateInstance("Namespace.MyClass");
Type type = assembly.GetType("Namespace.MyClass");

string parameter = "5|2";
object[] param = GetParameters(parameters);

MethodInfo method = type.GetMethod("Sum");
return method.Invoke(obj, param);

-----------------------------------------------------------

Actually this values gets from database in varchar type. Which is string parameter = "5|2".
I use following code in "GetParameters" method for split values;

private static object[] GetParameters(string pParameters)
{
string removeSplitCharacter = pParameters.Replace("|", "");
object[] param = new object[removeSplitCharacter.Length];

int index = 0;
foreach (object item in pParameters.Split('|'))
{
param.SetValue(item, index);
index++;
}

return param;
}

-----------------------------------------------------------

Namespace.MyClass.Sum metod contain following code;

public int Sum(int a, int b)
{
return a + b;
}

I get error; can not convert System.String to System.Int32

If I write "object[] mParam = new object[] { 5, 10 };" instead of parsing parameter value from db program works.

What can I do? Thanks...

Re: Reflection Parameter Problem object[]

Abhinav S10-Dec-09 22:16

Abhinav S

10-Dec-09 22:16

Instead of
param.SetValue(item, index);
use
param.SetValue(Convert.ToInt32(item), index);.

There's nothing left in my right brain and nothing right in my left brain.

Re: Reflection Parameter Problem object[]

dataminers10-Dec-09 22:27

dataminers

10-Dec-09 22:27

Its true but I dont know parameter types. In this example all values are int, "8|5". But may be another parameter like "true|false", or "John|Marry"...

Re: Reflection Parameter Problem object[] [modified]

Abhinav S10-Dec-09 22:32

Abhinav S

10-Dec-09 22:32

But then you wont be "adding" true and false (by using the same sum method). Even if you are, you would not add them numerically, right?
It will be a boolean "and" or a string "concatenation".

Are there other overloaded versions of SUM available in the class that you invoke?

If you try to pass a string into a method which uses ints as parameters, you will definitely get the conversion error.

There's nothing left in my right brain and nothing right in my left brain.

modified on Friday, December 11, 2009 4:40 AM

Re: Reflection Parameter Problem object[]

dataminers10-Dec-09 23:00

dataminers

10-Dec-09 23:00

I use different dll use for different parameter.

My database table contain varbinary dll and varchar parameter each row.

I want use necessary dll with this dll parameter.

Re: Reflection Parameter Problem object[]

Abhinav S10-Dec-09 23:58

Abhinav S

10-Dec-09 23:58

All I can think of then is that you fetch the parameter from the database and check its type. You then load the assembly you want to use for that type (if it is not already loaded!).

Then go ahead and call the appropriate method.

There's nothing left in my right brain and nothing right in my left brain.

Re: Reflection Parameter Problem object[]

Gideon Engelberth11-Dec-09 4:23

Gideon Engelberth

11-Dec-09 4:23

In that case, you have a few problems. The first is that you are assuming that all parameters are the one character long. The second is that your GetParameters method has no way to know what types you need. You need to get the parameter types from your MethodInfo and pass them into the function. Once you have that, you can use the more general Convert.ChangeType to create the right type of object.

Also, for readability's sake, why are you using param.SetValue(item, index) instead of just param(index) = item?

SendTcpSynExample.cs

3bood.ghzawi10-Dec-09 21:27

3bood.ghzawi

10-Dec-09 21:27

Thanks to all... Wink | ;)

Re: SendTcpSynExample.cs

Covean10-Dec-09 23:03

Covean

10-Dec-09 23:03

Lesson 1: Read and understand!

Error 1 The best overloaded method match for 'Tamir.IPLib.Packets.TCPPacket.TCPPacket(int, byte[], Tamir.IPLib.Packets.Util.Timeval)' has some invalid arguments C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 70 29 ConsoleApplication1

What could this mean? Maybe this "has some invalid arguments" could help!
-> your call to Tamir.IPLib.Packets.TCPPacket.TCPPacket has some invalid arguments.
So I would start there to look for your error!

Next step:
"Tamir.IPLib.Packets.TCPPacket.TCPPacket(int, byte[], Tamir.IPLib.Packets.Util.Timeval)"

-> int, byte[], Tamir.IPLib.Packets.Util.Timeval

This are the parameters the compiler expects. So how to solve?
Just give him what he wants!

Greetings
Covean

SendTcpSynExample.cs

3bood.ghzawi10-Dec-09 21:24

3bood.ghzawi

10-Dec-09 21:24

Hi all...

when i try to run the SendTcpSynExample.cs i face many errors (nearly 23),
like this
Error 1 The best overloaded method match for 'Tamir.IPLib.Packets.TCPPacket.TCPPacket(int, byte[], Tamir.IPLib.Packets.Util.Timeval)' has some invalid arguments C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 70 29 ConsoleApplication1
Error 2 Argument '3': cannot convert from 'bool' to 'Tamir.IPLib.Packets.Util.Timeval' C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 70 56 ConsoleApplication1
Error 3 Property or indexer 'Tamir.IPLib.Packets.EthernetPacket.SourceHwAddress' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 73 13 ConsoleApplication1
Error 4 Property or indexer 'Tamir.IPLib.Packets.EthernetPacket.DestinationHwAddress' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 74 13 ConsoleApplication1
Error 5 Property or indexer 'Tamir.IPLib.Packets.EthernetPacket.EthernetProtocol' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 75 13 ConsoleApplication1
Error 6 Property or indexer 'Tamir.IPLib.Packets.IPPacket.DestinationAddress' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 78 13 ConsoleApplication1
Error 7 Property or indexer 'Tamir.IPLib.Packets.IPPacket.SourceAddress' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 79 13 ConsoleApplication1
Error 8 Property or indexer 'Tamir.IPLib.Packets.IPPacket.IPProtocol' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 80 13 ConsoleApplication1
Error 9 Property or indexer 'Tamir.IPLib.Packets.IPPacket.TimeToLive' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 81 13 ConsoleApplication1
Error 10 Property or indexer 'Tamir.IPLib.Packets.IPPacket.Id' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 82 13 ConsoleApplication1
Error 11 Property or indexer 'Tamir.IPLib.Packets.IPPacket.Version' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 83 13 ConsoleApplication1
Error 12 'Tamir.IPLib.Packets.TCPPacket' does not contain a definition for 'IPTotalLength' C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 84 17 ConsoleApplication1
Error 13 Property or indexer 'Tamir.IPLib.Packets.IPPacket.IPHeaderLength' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 85 13 ConsoleApplication1
Error 14 Property or indexer 'Tamir.IPLib.Packets.TCPPacket.SourcePort' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 88 13 ConsoleApplication1
Error 15 Property or indexer 'Tamir.IPLib.Packets.TCPPacket.DestinationPort' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 89 13 ConsoleApplication1
Error 16 Property or indexer 'Tamir.IPLib.Packets.TCPPacket.Syn' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 90 13 ConsoleApplication1
Error 17 Property or indexer 'Tamir.IPLib.Packets.TCPPacket.WindowSize' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 91 13 ConsoleApplication1
Error 18 Property or indexer 'Tamir.IPLib.Packets.TCPPacket.AcknowledgementNumber' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 92 13 ConsoleApplication1
Error 19 Property or indexer 'Tamir.IPLib.Packets.TCPPacket.SequenceNumber' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 93 13 ConsoleApplication1
Error 20 Property or indexer 'Tamir.IPLib.Packets.TCPPacket.TCPHeaderLength' cannot be assigned to -- it is read only C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 94 13 ConsoleApplication1
Error 21 'Tamir.IPLib.Packets.TCPPacket' does not contain a definition for 'ComputeIPChecksum' C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 97 17 ConsoleApplication1
Error 22 'Tamir.IPLib.Packets.TCPPacket' does not contain a definition for 'ComputeTCPChecksum' C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 98 17 ConsoleApplication1
Error 23 The type or namespace name 'GetAllDevices' does not exist in the namespace 'SharpPcap' (are you missing an assembly reference?) C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 129 48 ConsoleApplication1
Error 24 The name 'EthernetFields_Fields' does not exist in the current context C:\Documents and Settings\Free User\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 43 27 ConsoleApplication1

.. Can any one help me to solve them?? Sniff | :^)

Thanks to all... Wink | ;)

Re: SendTcpSynExample.cs

dan!sh 10-Dec-09 22:24

dan!sh

10-Dec-09 22:24

1. What is SendTcpSynExample.cs?
2. Error message are pretty clearly telling what the problem is.
3. To me it looks like a case of incorrect reference. You might be using a different version of dll than what you should.

50-50-90 rule: Anytime I have a 50-50 chance of getting something right, there's a 90% probability I'll get it wrong...!!

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.