C# Discussion Boards - CodeProject

Re: Data at the root level is invalid. Line 1, position 1.

19-Nov-14 4:05

Hi all, I have a web service that used to work but stopped working when I migrated to a new computer. The new computer comes with Windows 8.1 and IIS Express. I made sure that I got everything I need by selecting every option under IIS.

I installed the same version of Visual studio (VS 2012) on the new machine and tried to run the same web app I had in the old machine. When I click a button which makes a call to my web service, nothing happens. I found out through Fidler2 that the problem was

"Data at the root level is invalid. Line 1, position 1."

I have searched online but none matched my situation. Basically all I'm trying to do is send text from a regular html page in the form of JSON to the web service. Then the web service will modify a text file on the server using the text it received. I know the code in the web service works because I called it directly in Visual Studio and it worked fine.

Please suggest a way to fix this problem, thanks in advance

modified 19-Nov-14 10:15am.

PIEBALDconsult19-Nov-14 4:40

PIEBALDconsult

19-Nov-14 4:40

Sounds like mal-formed XML. Have a look and give an example.

Re: Data at the root level is invalid. Line 1, position 1.

ASPnoob19-Nov-14 5:17

Re: Data at the root level is invalid. Line 1, position 1.

19-Nov-14 5:17

Hi, thanks for responding. I am not reading or writing any XML. In fact even after removing all the code in the webmethod of my webservice except for the return statement

return "Success!";

I still get the same error.

Dave Kreskowiak19-Nov-14 5:55

Dave Kreskowiak

19-Nov-14 5:55

Yes you are, you just don't know it.

Have a look in your web.config file and you'll probably file the XML in there is messed up.

A guide to posting questions on CodeProject

Click this: Asking questions is a skill.
Seriously, do it.

Dave Kreskowiak

Re: Data at the root level is invalid. Line 1, position 1.

ASPnoob19-Nov-14 6:45

Re: Data at the root level is invalid. Line 1, position 1.

19-Nov-14 6:45

Hi, thanks for replying. I validated the webconfig file and it is actually valid. It turns out the problem was in the url in my ajax. I copied and paste the webservice url from Visual Studio and it appears a couple of letters were automatically tacked onto the url between the webservice name and the webmethod name. Once I removed the extra letters everything worked fine.

PIEBALDconsult19-Nov-14 5:56

PIEBALDconsult

19-Nov-14 5:56

JSON is XML, is it not?

Re: Data at the root level is invalid. Line 1, position 1.

ASPnoob19-Nov-14 6:54

Re: Please take up this survey for .Net BDD tools

19-Nov-14 6:54

Hi, thanks for replying. You got me thinking for a minute there with your question

"JSON is XML, is it not?"

According to json.org JSON is not XML, it's an alternative to XML.

Also the website

HTML

http://searchwindevelopment.techtarget.com/definition/JSON-Javascript-Object-Notation

says the following:

"JSON was originally based on the Javascript programming language and was introduced as the page scripting language for the Netscape Navigator Web browser"

modified 19-Nov-14 13:08pm.

Message Closed

19-Nov-14 2:27

Kalyan Chandrasekharan

19-Nov-14 2:27

Message Closed

BillWoodruff19-Nov-14 3:31

BillWoodruff

19-Nov-14 3:31

I would suggest your survey include possible "null" use-cases by asking questions with negative answers like:

Are you familiar with BDD, and have you used BDD:

1. No
2. Aware of BDD through media
3. Familiar based on reading articles, or documentation
4. Familiar, and actually used a BDD tool
5. Familiar, and using BDD tools now

Have you used BDD:

1. No
2. Once
3. More than once.

If you have used BDD, but would no longer consider using it again:

1. You would not use it again because of performance issues
2. You would not use it again because of code complexity and maintenance issue.
3. You would not use it again because of errors produced by a specific BDD tools
4. You would not use it again because you no longer see any value in it
5. You would not use it again because your work no longer requires it

Have you used more than one BDD software tool:

....

And, so forth.

«If you search in Google for 'no-one ever got fired for buying IBM:' the top-hit is the Wikipedia article on 'Fear, uncertainty and doubt'» What does that tell you about sanity in these times?

Re: Please take up this survey for .Net BDD tools

Gerry Schmitz19-Nov-14 3:49

Gerry Schmitz

19-Nov-14 3:49

I'd give you a fail simply for asking what someone's "gender" was.

Wifi scan, SSID, Signalstrength

Nikolaj jensen19-Nov-14 0:45

Nikolaj jensen

19-Nov-14 0:45

I'm trying to use the Native Wifi for continuesly reading the signal strength.

If i run the code below in a fast loop, it quickly crashes with below msg. If I move the "client" object instantiation out, and only do that once, it does not crash. However it's not updating the value correctly. If I turn of the wifi on the remote device off, this is not recogniced until i shut down my application. Only then does my pc-wifi-client remove the remote wifi device from the list.

How can i continuesly read the signal strength of a specifi SSID ?

An unhandled exception of type 'System.ComponentModel.Win32Exception' occurred in DynamicData.exe. Additional information: An attempt was made to establish a session to a network server, but there are already too many sessions established to that server

public uint Wifi()
       {
           signalStrength = 0;
           WlanClient client = new WlanClient();

           foreach (WlanClient.WlanInterface wlanIface in client.Interfaces)
           {

               Wlan.WlanAvailableNetwork[] networks = wlanIface.GetAvailableNetworkList(0);
               foreach (Wlan.WlanAvailableNetwork network in networks)
               {
                   if (GetStringForSSID(network.dot11Ssid) == "NAME")
                   {    
                        signalStrength = network.wlanSignalQuality;

                   }
               }


           }

          return signalStrength;
       }

Re: Wifi scan, SSID, Signalstrength

Nagy Vilmos19-Nov-14 3:36

Nagy Vilmos

19-Nov-14 3:36

The answer is in the exception:

Nikolaj jensen wrote:
An unhandled exception of type 'System.ComponentModel.Win32Exception' occurred in DynamicData.exe. Additional information: An attempt was made to establish a session to a network server

So what else is running? Are you opening connections and leaving them open?
You will need to look at the entire program and not just this method.

asp.net certification

Member 1124574618-Nov-14 20:35

Member 11245746

18-Nov-14 20:35

Hi All,

Am 2+ years experienced in asp.net,webservices and ado.net and am planning to take an MCPD certification.Can you please suggest me which .net framework version to choose and can you suggest me which exam code should i apply for?

Thanks,
Navatha.

Re: asp.net certification

Richard MacCutchan18-Nov-14 21:20

Richard MacCutchan

18-Nov-14 21:20

Please read http://www.codeproject.com/Messages/1278604/How-to-get-an-answer-to-your-question.aspx[^]. But see also https://www.google.com/search?q=MCPD+certification[^].

Re: asp.net certification

ZurdoDev19-Nov-14 5:26

ZurdoDev

19-Nov-14 5:26

Member 11245746 wrote:
Can you please suggest me which .net framework version to choose

I think you should always target the most recent one.

There are only 10 types of people in the world, those who understand binary and those who don't.

serial communication

Henri Aghaei18-Nov-14 7:29

18-Nov-14 7:29

I have a device that sends a value:
V_rms: 120 v

I can use a terminal on my PC and see it through my serial port.

Now, I would like to make a software of my own version to see it on a window like this:
__________
V_rms | 120 |
|__________|

(A square with the value)
Can you please guide me to start to build such GUI?
Is C# a good option to use? I use Visual Studio as an IDE. Do you have another better option such as MATLAB maybe?

What do you think?

Thanks in advance!

OriginalGriff18-Nov-14 8:01

OriginalGriff

18-Nov-14 8:01

It should work fine in C#, if you already know the language.
See the SerialPort class for starters: MSDN[^] - the link contains an example - it should handle the communications pretty well.
Display is also pretty trivial - but I'd get the comms part working first, as that's likely to be the most complicated (and hardest to test).

Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

Henri Aghaei19-Nov-14 6:44

19-Nov-14 6:44

While I use Visual Studio C#. Should I choose Windows Forms Application? I got a little bit confused. Let's take a look at the following example.

<a href="http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.datareceived(v=vs.110).aspx">http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.datareceived(v=vs.110).aspx</a>[<a href="http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.datareceived(v=vs.110).aspx" target="_blank" title="New Window">^</a>]

Where should I copy and past this piece of code? Because when I use Forms I got many errors!

OriginalGriff19-Nov-14 8:07

OriginalGriff

19-Nov-14 8:07

WinForms is not a bad idea - it's probably the simplest after a Console app.

And the example there is a Console app - so you can't just "copy and paste" it and expect it to work.
You could copy and paste it into a Console app and it should compile cleanly (but you need to look at how it works and combine that with your task rather than just trying to code by copy and paste - that really doesn't work for anything more than trivial applications regardless of language)

Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

Henri Aghaei19-Nov-14 9:01

19-Nov-14 9:01

Oh shoot!

Thanks for the explanation!

BillWoodruff18-Nov-14 23:58

BillWoodruff

18-Nov-14 23:58

Assuming the picture background doesn't need to change, I would use Windows Forms, and:

0. create a new WinForms project.

1. prepare a background picture using whatever Graphic program I was familiar with, and save it in .jpg or .png format the one of the folders in the WinForms project.

2. on a Form in the project put a PictureBox, re-size it to hold the picture you created; load the picture you created into the Image property of the PictureBox.

3. place a Label with its background color set to be the same as the background of the Form on top of the PictureBox positioned where it's text will appear over the PictureBox so it appears as you show above.

4. as you receive data from the serial port, do the right thing to display the text representation of the data as the 'Text property of the Label.

Since I follow a programming methodology called "The Path of Slack," which holds that laziness is an ultimate value Smile | :)

, I might do something like this in WinForms.

1. Put a Panel with BorderStyle set to 'FixedSingle on the Form.

2. repeat steps 3,4 above.

The only thing to watch for in this second approach is to make sure the Panel doesn't "swallow" the Label (while you drag it over the Panel assign the Label to the Panel's ControlCollection).

«If you search in Google for 'no-one ever got fired for buying IBM:' the top-hit is the Wikipedia article on 'Fear, uncertainty and doubt'» What does that tell you about sanity in these times?

modified 19-Nov-14 6:09am.

Henri Aghaei19-Nov-14 9:05

19-Nov-14 9:05

Um...Bill! I am a little bit confused! I do not care about how fancy the GUI is. What about the communication part? I would like to get it work and listen to my device first and then plan to add more feature later on!

Henri Aghaei20-Apr-15 9:57