C# Discussion Boards - CodeProject

Add-in Solutions from Visual Studio .NET 2003 to 2005

rathishps3-May-05 23:28

3-May-05 23:28

HI,
I have a C# test application developed in Visual Studio .NET 2003. But I want to run it in Visual Studio .NET 2005. But I counldn't run it. It shows that .NET framework 1.1 requires for it to run. I tried to solve problem by registry. But it failed. Can anyone have an idea? Please let me know.

Regards,
Rathish P S

Re: Add-in Solutions from Visual Studio .NET 2003 to 2005

Judah Gabriel Himango4-May-05 4:35

Judah Gabriel Himango

4-May-05 4:35

What do you mean "run it in Visual Studio 2005"? Do you mean run it under .NET 2.0?

The only thing I can think of, is if the application has a .config file specifying the version it needs to run on.

Tech, life, family, faith: Give me a visit.
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Judah Himango

Re: Add-in Solutions from Visual Studio .NET 2003 to 2005

rathishps6-May-05 2:17

rathishps

6-May-05 2:17

HI,
I have a set up Application in C#.Net 7.1. It is an AddIn to IDE. When I tried to run this application in c# 8.0, an error "Class Not registered" is thrown. Can anyone tell me the reason?

Regards,
Rathish P S

checking directory or file permission of network folders

Xiao_M3-May-05 22:48

Xiao_M

3-May-05 22:48

Hi,

How do I check if a c# program got permission to a network folder or file. Is there anyway I can change the permission if the program dont have the access rights to it?

Cryptography

Yaakov Davis3-May-05 22:36

Yaakov Davis

3-May-05 22:36

Hi all.

I want to generate a hashcode from string and encrypt it with the private key of a .sn file (strong name key pair).

The purpose is to hash the contents of a configuration file, encrypt it, and add the encrypted hash to the file.
At runtime, I want to decrypt the hash with the public key of the assembly, and determine whether the hash is the same of the current hash of the contents.

I have no idea how to do that in practical, can you give some guidelines for that?
Any references would be welcome.

Thanks a lot,
Yaakov

Re: Cryptography

Trance Junkie4-May-05 4:13

Trance Junkie

4-May-05 4:13

hmm.... I will look in to it man ! Laugh | :laugh:

Re: Cryptography

Yaakov Davis4-May-05 4:46

Yaakov Davis

4-May-05 4:46

I found a helper class that answers most of my questions.
Here:
http://spaces.msn.com/members/staceyw/Blog/cns!1pnsZpX0fPvDxLKC6rAAhLsQ!284.entry?beid=cns!1pnsZpX0fPvDxLKC6rAAhLsQ!284#postcns!1pnsZpX0fPvDxLKC6rAAhLsQ!284[^]

Re: Cryptography

Enishi4-May-05 4:57

Enishi

4-May-05 4:57

Hi, i used this code i hope it helps u and u understand it

RSACryptoServiceProvider RSA;<br />
RSA = new RSACryptoServiceProvider();<br />
byte[] rawData, hash;<br />
HashAlgorithm HashMan;<br />
HashMan = new SHA1CryptoServiceProvider();<br />
rawData= System.Text.Encoding.Unicode.GetBytes(string PASSWORD); ///get the bytes of the original password<br />
hash = HashMan.ComputeHash(rawData); //uses the private key to generate the hash<br />
RSAPKCS1SignatureFormatter sf = new RSAPKCS1SignatureFormatter(RSA);   //this one will use the public key to encode it more                    <br />
sf.SetHashAlgorithm("SHA1");<br />
byte []FinalSignature= sf.CreateSignature(hash); //creates the signature, u will send this one to the receiver along with the public key<br />
<br />
RSA.ExportParameters(false); //this both sentences will give the public key, if u pass them true will give also the private key.<br />
RSA.ToXMLString(false);

ull send to the receiver the FinalSignature and the RSAParameters or the string with the public key.

in the receiver

<br />
//if u used the RSA.EXPORTPARAMETERS<br />
RSAPKCS1SignatureDeformatter sd=new RSAPKCS1SignatureDeformatter(parameters);<br />
// or if u used the xml string<br />
RSAPKCS1SignatureDeformatter sd=new RSAPKCS1SignatureDeformatter();<br />
sd.FromXMLString(string xmlParameters);<br />
//<br />
sd.SetHashAlgorithm("SHA1");<br />
bool pd=sd.VerifySignature(hashinurdatabase,FinalSignature);<br />
<br />

i hope it helps u with the code if u dont uderstand something or want to ask something just say here or emailme.

U will need to give to the SignatureDefformater the parameters of the RSACryptoServerProvider u used in the SignatuerDefformater or it will return u false.

Re: Cryptography

Yaakov Davis4-May-05 7:44

Yaakov Davis

4-May-05 7:44

Thanks for the detailed answer.

If I get it right, I can replace the following code:

HashAlgorithm HashMan;<br />
HashMan = new SHA1CryptoServiceProvider();<br />
rawData= System.Text.Encoding.Unicode.GetBytes(string PASSWORD); <br />
hash = HashMan.ComputeHash(rawData);<br />
RSAPKCS1SignatureFormatter sf = new RSAPKCS1SignatureFormatter(RSA);<br />
sf.SetHashAlgorithm("SHA1");<br />
byte[] FinalSignature= sf.CreateSignature(hash);

with this one:

rawData = System.Text.Encoding.Unicode.GetBytes(string PASSWORD); <br />
byte[] FinalSignature = RSA.SignData(rawData, "SHA1");

Is that correct?

Yaakov

Re: Cryptography

Enishi5-May-05 5:59

Enishi

5-May-05 5:59

i am not sure, i think i tried that way but it didnt work for me, i needed to sign the data from the hash with the signature formatter cause it will encode it too.

Try if u can do it that way, but i think the sign data didnt do the same as the signatureformatter

sDataGrid

Illegal Operation3-May-05 20:25

Illegal Operation

3-May-05 20:25

Hi,

I would like to find out how to use paging in my datagrid?

I have created the datagrid that pulls data from SQL 2000. I am displaying all the records. What I want to do is display 10 records at a time.
I have used paging but when I run the app and click next the same 10 records is displayed.

Can someone please tell me how to page trhough the data?

Thanks!

Illegal Operation

WannaBe and GonnaBe Systems Developer

Re: sDataGrid

V.3-May-05 23:47

3-May-05 23:47

an event should be fired when clicking next page. Implement an eventhandler for the event, you can there alter the page of your datagrid. More info on MSDN.

Good luck.

No hurries, no worries.

Re: sDataGrid

Illegal Operation4-May-05 19:50

Illegal Operation

4-May-05 19:50

I have created an event.

private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
DataGrid1.CurrentPageIndex = e.NewPageIndex;
DataGrid1.DataBind();
}
but when running the site, the event does not execute???

Illegal Operation

WannaBe and GonnaBe Systems Developer

Re: sDataGrid

V.4-May-05 23:01

4-May-05 23:01

you 're using ASP.NET? not winforms?
In that case you should look into the lifecycle of the page. Try to bind the eventhandler sooner then the Load event (init eg.)

The lifecycle of asp.net pages is, in my opinion, not so easy to understand, but it is quite important.

good luck!

No hurries, no worries.

How to add user Controls for Forms?

pubududilena3-May-05 20:07

pubududilena

3-May-05 20:07

Hi all,
I want to add search Panel to 5 Forms in my C# Application..But I can not declare search panels one by one and coded to every forms..it is wasting my time.
Can I use User Control and decalre search panel in there and added to every Forms?

Or is there good way to do that?

please reply me soon..
thanks in advance..

Re: How to add user Controls for Forms?

Joshua Nussbaum3-May-05 20:14

Joshua Nussbaum

3-May-05 20:14

The easiest way is to create one base form, add the panel to that form. All the 5 forms should then inherit from the base form.

60% of statistics are made up on the spot

Re: How to add user Controls for Forms?

spif20013-May-05 20:17

spif2001

3-May-05 20:17

Make a user control (search panel) and make a MyForm class which inherits Form. Then add the user control to the MyForm.

When u need a Form with a search panel, just make add a new Form class and substitute the Form inheritance with MyForm.

public class SearchForm1 : MyForm
{

}

I'm in the high-fidelity first class traveling set.
And I think I need a Lear jet.

Re: How to add user Controls for Forms?

pubududilena4-May-05 0:24

pubududilena

4-May-05 0:24

Thanks for reply..All the procedures are working.

Executing 2 Service classes in a single windows service

rameedev3-May-05 19:44

rameedev

3-May-05 19:44

Hi All

I have a windows service with 2 service classes.. and in the OnStart()method of both classes i am doing a event log to check if both are started.. When i install the service and run it by clicking on it..It Shows message from the first Service Class.. I dont know what to do..Please Help

Regards
RameeDev

public CFirst()
{
InitializeComponent();
if(!EventLog.SourceExists("CFirstLog"))
{
EventLog.CreateEventSource("CFirstLog","CFirstLog");
}
evLog = new EventLog("CFirstLog");
evLog.Source = "CFirstLog";
}

static void Main()
{
System.ServiceProcess.ServiceBase[] ServicesToRun;
ServicesToRun = new System.ServiceProcess.ServiceBase[] { new CFirst(),new CSecond()};
System.ServiceProcess.ServiceBase.Run(ServicesToRun);
}

protected override void OnStart(string[] args)
{
evLog.WriteEntry("CFirst Started");
}

I am doing the same in CSecond Class

rameedev

Preserving details of trial peiod in C#

Anonymous3-May-05 19:36

Anonymous

3-May-05 19:36

I am writing a C# program which will store the date of installation of the program on user machine along with the Disk Volume ID in an encrypted form, for trial period authentication. This information is generated by the program at the time of the first run. The problem is where to store this information on the user machine so that the user (including the administrator) cannot delete the same. Because if the user could find out where the information is stored (in a file or otherwise), he can simply delete the same and install the program again, which would re-initialize the date of installation. This will defeat the purpose.

So, some cross-check is required to be built so that if the user deletes this file or information, still on re-installation of the program, the cross-check can give the "true" information to the program about the installation date.

Any suggestions or ideas as to where this "cross-check" could be stored in a "safe" manner?

Re: Preserving details of trial peiod in C#

Christian Graus3-May-05 19:44

Christian Graus

3-May-05 19:44

I would do it by installing a second copy of the same key somewhere else, so that if the first one is deleted, the second one can be checked. If you can encode this info into a file that you write to the hard drive, and call something.dll, or some other obsfucated name, that would be perfect.

No protection is fool proof, though.

Christian Graus - Microsoft MVP - C++

Re: Preserving details of trial peiod in C#

Anonymous3-May-05 20:42

Anonymous

3-May-05 20:42

thanks for your suggestion.

Rich text box

StephenMcAllister3-May-05 16:41

StephenMcAllister

3-May-05 16:41

When typing text into arich text box and I hit enter no new line is created. Is there a property to change to allow the user to create as many new lines as they would like?

thanks

Re: Rich text box

Ali Iqbal Khan3-May-05 18:46

Ali Iqbal Khan

3-May-05 18:46

Yes, there is a MultiLine property, which you have to assign True.

Happy Coding!!! Smile | :)

Re: Rich text box

StephenMcAllister3-May-05 19:14

StephenMcAllister

3-May-05 19:14

Thanks Ali. I have set that property to true and it is still the same.

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