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Re: help needed for httpwebreqest and postback

Manas Bhardwaj29-Jun-09 21:58

Manas Bhardwaj

29-Jun-09 21:58

Don't you think this question is more appropriate for ASP.Net forum.

Manas Bhardwaj
Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

Re: help needed for httpwebreqest and postback

aamirzada6-Jul-09 0:47

aamirzada

6-Jul-09 0:47

yea it is system.net class and can b used in both asp.net and c#

thanx alot i have made it.

thanx

amirzada

Unassigned local variable

gwithey29-Jun-09 21:23

gwithey

29-Jun-09 21:23

I have a variable

byte[] rxData;

And VS is complaining that it is unassigned. However i dont want to assign it as this is done in the switch statement that follows.

does anyone know why it still complains

;switch (rxMessage[3])
              {
                 case 0x46: // full Display Area
                    for (int i = 4; i &amp;amp;lt;= 1028; i++)
                    {rxData[i - 4] = rxMessage[i];}
                    break;
                 case 0x42: // This command shall switch off the LCD and clear the LCD RAM
                    rxData[0] = 0;
                    break;
                 case 0x4f: // LCD On Off
                    rxData[0] = rxMessage[4];
                    break;
                 case 0x43:
                    rxData[0] = rxMessage[4];
                    break;
                 default:
                    //error
                    throw new InvalidDataException("Error: Incorrect Subcommand type may have been found");
              }

Re: Unassigned local variable

SeMartens29-Jun-09 21:35

SeMartens

29-Jun-09 21:35

Hi,

maybe you have to initialise rxData first. It is set to null by default, but to assign values to the array (using an index like 0 at nul won't work). It must be initialised like this:

byte[] rxData = new byte[1024];

Regards
Sebastian

It's not a bug, it's a feature!

Check out my CodeProject article Permission-by-aspect.

Me in Softwareland.

Re: Unassigned local variable

dan!sh 29-Jun-09 21:37

dan!sh

29-Jun-09 21:37

You have not defined the array.

byte[] rxData = new byte[someNumber];

Re: Unassigned local variable

gwithey29-Jun-09 21:41

gwithey

29-Jun-09 21:41

Thanx For both of your answers this does allow the code to compile.

Was just hoping i could declaire it and give it a value in the switch without it complaining. The flow was being forced through the switch so though it would work.

Thanx for your time

Re: Unassigned local variable

OriginalGriff29-Jun-09 21:53

OriginalGriff

29-Jun-09 21:53

gwithey wrote:
Was just hoping i could declaire it and give it a value in the switch without it complaining. The flow was being forced through the switch so though it would work.

No, it wouldn't work: that is the whole point.
To cut down your code a little:

byte[] rxData;
rxData[0] = rxMessage[4];

You would still get your compile error, since rxData is null, thus rxData[0] does not exist. This is why the compiler complains.

byte[] rxData = new byte[1024];
rxData[0] = rxMessage[4];

Is fine, since rxData is no longer null, and rxData[0] (through rxData[1023]) exists and can be assigned.

No trees were harmed in the sending of this message; however, a significant number of electrons were slightly inconvenienced.

This message is made of fully recyclable Zeros and Ones

Re: Unassigned local variable

gwithey30-Jun-09 0:38

gwithey

30-Jun-09 0:38

Yeah that makes sense thanx it is clearer now

WIA Video Problem...??

S K Y29-Jun-09 20:44

S K Y

29-Jun-09 20:44

please any one can tell me how can i show a preview of the webcam video in a panel or picturebox using WIA or WIAVideo Li or in any other way.....

thanks....

Re: WIA Video Problem...??

Nuri Ismail29-Jun-09 21:08

Nuri Ismail

29-Jun-09 21:08

Here is exactly what you want: [^].
The provided source code uses avicap32.dll, so if you want a WIA solution check this article: [^].

I hope these links help you, Smile | :)

Nuri

Re: WIA Video Problem...??

S K Y29-Jun-09 21:38

S K Y

29-Jun-09 21:38

thanks for help...but in that way have to use a commen dialog box. isn't it? but i want to show my webcam preview in a panal or picturebox without using commen dialog box...is there a way to do that....?

A S E L A

Re: WIA Video Problem...??

Nuri Ismail29-Jun-09 22:01

Nuri Ismail

29-Jun-09 22:01

S K Y wrote:
but i want to show my webcam preview in a panal or picturebox without using commen dialog box...

I don't understand that.

The source code from the second link uses exactly the PictureBox control to show the captured video (picture by picture using timer). Please check out the provided source code for the article. The are 2 versions of the code available (for C# and VB). You can use the provided technique and place the PictureBox wherever you want.

Best wishes! Smile | :)

Nuri

Re: WIA Video Problem...??

S K Y29-Jun-09 22:16

S K Y

29-Jun-09 22:16

hi...i couldn't download the zip file bcz got server error. do you have that zip file with you...(first article)

A S E L A

Re: WIA Video Problem...??

Nuri Ismail29-Jun-09 22:22

Nuri Ismail

29-Jun-09 22:22

I also have the server error for the first article. Frown | :(

But i have downloaded and tested the source from the second one. It uses exactly the WIA, the PictureBox control and it is working! Smile | :)

Re: WIA Video Problem...??

Christian Graus30-Jun-09 0:13

Christian Graus

30-Jun-09 0:13

Bloody hell. You've been given explicit instructions, day after day. Perhaps you should just abandon this project ?

Christian Graus

Driven to the arms of OSX by Vista.

"! i don't exactly like or do programming and it only gives me a headache." - spotted in VB forums.

I can do things with my brain that I can't even google. I can flex the front part of my brain instantly anytime I want. It can be exhausting and it even causes me vision problems for some reason. - CaptainSeeSharp

Mediaplayer version checking

rakeshs31229-Jun-09 20:24

rakeshs312

29-Jun-09 20:24

Hi,

When i click on a button ,it will check which version of mediaplayer is installed in that system. I am stucked here.What is the code for this in c#.

Pls help

Re: Mediaplayer version checking

stancrm29-Jun-09 20:41

stancrm

29-Jun-09 20:41

string wmpExe = string.Concat(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles), @"\Windows Media Player\wmplayer.exe");
if(File.Exists(wmpExe))
{
  FileVersionInfo fileVersionInfo = FileVersionInfo.GetVersionInfo(wmpExe);
  // fileVersionInfo  is the version info of WMP  
}

Re: Mediaplayer version checking

rakeshs31229-Jun-09 20:50

rakeshs312

29-Jun-09 20:50

Thanks for the replay, stancrm.

Re: Mediaplayer version checking

Akhmad Suaidi29-Jun-09 21:41

Akhmad Suaidi

29-Jun-09 21:41

Hi rakesh312,

#1. Add a reference to your project point to \windows\system32\wmp.dll
#2. add this one in top of code :
using WMPLib;
#3 to get media player version is something like this :
WindowsMediaPlayer wmp = new WindowsMediaPlayer();
MessageBox.Show( wmp.versionInfo.ToString());

Good luck

How can i convert a List to Dataset?

Alim1234529-Jun-09 20:04

Alim12345

29-Jun-09 20:04

How can i convert a List to Dataset?

Regards,
Alim

Re: How can i convert a List to Dataset?

himanshu256129-Jun-09 20:53

himanshu2561

29-Jun-09 20:53

Try http://blog.lozanotek.com/archive/2007/05/09/Converting_Custom_Collections_To_and_From_DataTable.aspx[^]

himanshu

Databe create by Programmatically but Password not create

khosnur29-Jun-09 19:01

khosnur

29-Jun-09 19:01

I try to develop windows mobile application. Pro grammatically i create database but it does not crate password. so it show password mismatch.

Plz help me this is my first windows mobile application...

My code is given below:

DataTable dt = new DataTable("ServerSettings"); dt.ReadXmlSchema(System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase) + ("\\ServerInformation.bin"));
dt.ReadXml(System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase) + ("\\ServerInformation.bin"));

SqlCeReplication repl = new SqlCeReplication();

repl.InternetUrl = @"http://" + dt.Rows[0]["PCName"].ToString() + "/DBRestaurant/sqlcesa30.dll";
repl.Publisher = dt.Rows[0]["PCName"].ToString();
repl.PublisherDatabase = @"DBRestaurant";
repl.PublisherSecurityMode = SecurityType.DBAuthentication;
repl.PublisherLogin = @"sa";
repl.PublisherPassword = dt.Rows[0]["PublicatrionPassword"].ToString();
repl.Publication = @"DBRestaurant";
repl.Subscriber = @"DBRestaurant";

repl.SubscriberConnectionString = @"Data Source=""My documents\DBRestaurant.sdf"";Password=" + dt.Rows[0]["SubscriptionPassword"].ToString() + ";Max Database Size=128;Default Lock Escalation =100;";

try
{
if(!System.IO.File.Exists("My documents\\DBRestaurant.sdf"))
repl.AddSubscription(AddOption.CreateDatabase);
repl.Synchronize();
}
catch (SqlCeException e)
{
System.Windows.Forms.MessageBox.Show(e.ToString());
}

Ignore repost

Manas Bhardwaj29-Jun-09 22:00

Manas Bhardwaj

29-Jun-09 22:00

Ignore repost

Manas Bhardwaj
Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

Create database in windows mobile but dont create password

khosnur29-Jun-09 18:48

khosnur

29-Jun-09 18:48

Create database in windows mobile but when i run doesn't create password so exception for password mismatch.If i Create database in windows mobile it works fine...

How solve it...
Plz Help me . this is my first project of windows mobile.
Code is given below:

DataTable dt = new DataTable("ServerSettings");
dt.ReadXmlSchema(System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase) + ("\\ServerInformation.bin"));
dt.ReadXml(System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase) + ("\\ServerInformation.bin"));

SqlCeReplication repl = new SqlCeReplication();

repl.InternetUrl = @"http://" + dt.Rows[0]["PCName"].ToString() +"/DBRestaurant/sqlcesa30.dll";
repl.Publisher = dt.Rows[0]["PCName"].ToString();
repl.PublisherDatabase = @"DBRestaurant";
repl.PublisherSecurityMode = SecurityType.DBAuthentication;
repl.PublisherLogin = @"sa";
repl.PublisherPassword = dt.Rows[0]["PublicatrionPassword"].ToString();
repl.Publication = @"DBRestaurant";
repl.Subscriber = @"DBRestaurant";
repl.SubscriberConnectionString = @"Data Source=""My documents\DBRestaurant.sdf"";Password=" + dt.Rows[0]["SubscriptionPassword"].ToString() + ";Max Database Size=128;Default Lock Escalation =100;";

try
{

if(!System.IO.File.Exists("My documents\\DBRestaurant.sdf"))
repl.AddSubscription(AddOption.CreateDatabase);
repl.Synchronize();
}
catch (SqlCeException e)
{
System.Windows.Forms.MessageBox.Show(e.ToString());
}

Re: Create database in windows mobile but dont create password

himanshu256129-Jun-09 20:57

himanshu2561

29-Jun-09 20:57

Wrong forum

himanshu

Last Visit: 31-Dec-99 18:00 Last Update: 24-May-24 22:26

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