C# Discussion Boards - CodeProject

Re: Enum of C# Data Types - byte[] and char[]

30-Oct-17 14:06

DotNetTypes.ByteArray ? Confused | :confused:

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Kevin Marois31-Oct-17 4:56

Kevin Marois

31-Oct-17 4:56

ByteArray is not a valid .Net data type. The items in my enum are. The question is how to define one that makes it array.

With the .Net types:

System.Int16
System.Int32
System.Int64

in my enum those are

@Int16,
@Int32,
@Int64

The compiler recognizes those are valid .Net types. So for

System.Byte

How do you add an enum for byte[]? Byte and Byte[] are not the same.

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Re: Enum of C# Data Types - byte[] and char[]

Sascha Lefèvre31-Oct-17 5:20

Convert an obsolete old REST documentation

31-Oct-17 5:20

Kevin Marois wrote:
ByteArray is not a valid .Net data type. The items in my enum are. The question is how to define one that makes it array.

No - the items in your enum aren't types either. They just bear the same name and that's why the grammar of C# requires you to prefix them with an @. You don't gain anything by doing that.

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Member 1096750730-Oct-17 0:54

Member 10967507

30-Oct-17 0:54

Hey guys.

I'm struggling to use a REST API. My Problem is that only available documentation for this API is too old and it is not supported in newer versions of .net

Please help me to convert it, here is the documentation:

// Using "WCF REST Starter Kit" (http://msdn.microsoft.com/en-us/netframework/cc950529.aspx)
using (var client = new HttpClient("http://rt.site.com/REST/1.0/"))
{
   client.TransportSettings.Cookies = new CookieContainer();

   var form = new HttpUrlEncodedForm();
   form.Add("user", "LOGIN");
   form.Add("pass", "PASSWORD");

   client.Post(string.Empty, form.CreateHttpContent());

   // 1. Get ticket data
   using (var request = client.Get("ticket/1234/show"))
   {
      string content = request.Content.ReadAsString();
      // Some logic
   }

   // 2. Post ticket reply with attachment
   var formPost = new HttpMultipartMimeForm();
   byte[] attachment = new byte[];
   string content = string.Empty;
         
   // Store data in attachment
   // Store data in content string ("Field: Value" line by line)
   // ...
         
   formPost.Add("content", content);
   formPost.Add("attachment_1", "attachment_1", HttpContent.Create(attachment, "application/octet-stream"));
                             
   using (var post = client.Post("ticket/1234/comment"), formPost.CreateHttpContent()))
      // Some logic
}

And here is what I have done so far:

var credentials = new NetworkCredential(name, pass);
CookieContainer CookieContainer = new CookieContainer();
var handler = new HttpClientHandler {CookieContainer = CookieContainer,  Credentials = credentials };
using (var client = new HttpClient(handler))
{

    client.BaseAddress = new Uri("https://something.net");

    var form = new List<KeyValuePair<string, string>>();
    form.Add(new KeyValuePair<string, string>("user", name));
    form.Add(new KeyValuePair<string, string>("pass", pass));

    var request = new HttpRequestMessage(HttpMethod.Post, "/rt/REST/1.0");

    request.Content = new FormUrlEncodedContent(form);

    var response = await client.SendAsync(request);

    var contents = await response.Content.ReadAsStringAsync();

Please note to this comment:

The REST Interface does not support HTTP-Authentication. So you must get a valid Session-Token and submit the cookie each request. You usually get a Session-Cookie by submitting the default login form. Use variables "user" for login and "pass" for password values

Thank you very much

How calculate Checksum for barcode code128 auto?

Le@rner29-Oct-17 20:01

Le@rner

29-Oct-17 20:01

hi all,

barcode code 128 symbology use modulo 103 for checksum digit.

it has 3 subset A , B C, 103,104 and 105 use respectively to calculate checksum.

what can i use to calculate for code 128 Auto and uss/ean 128?

please help me for this.

thanks in advance.

Re: How calculate Checksum for barcode code128 auto?

Richard MacCutchan29-Oct-17 22:27

CODE 128 and EAN-128｜Basics of Barcodes[^]

29-Oct-17 22:27

Re: How calculate Checksum for barcode code128 auto?

Sascha Lefèvre29-Oct-17 22:27

No overload for method, error in c# file for Unity.

29-Oct-17 22:27

Code 128 - Wikipedia[^]

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Member 1349123628-Oct-17 14:33

Member 13491236

28-Oct-17 14:33

I just started learning Unity a few days ago, and I have found a very helpful tutorial on how to make a game. However, I keep getting this error and I have tried everything to figure out why its occurring. Maybe someone can take a look at the code and help me out? Thanks!

The error is on the line "DialogueSystem.Instance.AddNewDialogue (dialogue);"
And the full error is "No overload for method 'AddNewDialogue' takes '1' arguments"

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class NPC : Interactable {
	public string[] dialogue;


	public string name;

	public override void Interact()
	{
		DialogueSystem.Instance.AddNewDialogue (dialogue);
		Debug.Log ("Interacting with NPC.");
	}
}

Re: No overload for method, error in c# file for Unity.

Sascha Lefèvre28-Oct-17 14:47

Re: No overload for method, error in c# file for Unity.

28-Oct-17 14:47

Use IntelliSense: Remove and re-type the opening brace after AddNewDialogue and Visual Studio will show you a pop-up with all valid signatures of that method(name). And most likely there actually will be none with only one argument.

If your tutorial suggests otherwise then you're probably missing a using-declaration or an assembly reference. If it's the former then Visual Studio should show a "Quick Actions and Refactorings"-tooltip when hovering over AddNewDialogue that allows you to have the using-declaration added. Otherwise look through the tutorial for instructions on which assemblies to reference.

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Member 1349123628-Oct-17 15:25

Member 13491236

28-Oct-17 15:25

Thanks! That did the trick

C# Problem extracting file from .zip created with DotNetZip

manic_drummer28-Oct-17 11:58

manic_drummer

28-Oct-17 11:58

I'm writing a C# WinForms project that uses DotNetZip. Here's the step-by-step to save a file:

1. Write the file to a temp file using FileStream and BinaryWriter...

glbstrSaveFilePath = strfilepath;
            string strTempPath = Path.GetTempFileName();
            Path.ChangeExtension(strTempPath, ".bin");

            FileStream fs = new FileStream(strTempPath, FileMode.Create, FileAccess.Write);
            BinaryWriter bw = new BinaryWriter(fs);

            bw.Write(somestring);
            bw.Write(someboolean);
            bw.Write(someotherstring);

2. Next, I use DotNetZip to compress it and save it to the location from the SaveFileDialog...

using (ZipFile zip = new ZipFile())
                {
                    Path.ChangeExtension(strTempPath, ".bin");
                    zip.AddFile(strTempPath, "MyProject");
                    zip.Save(strfilepath);
                }

The file seems to be compressing and saving correctly because I can open the resulting file in 7-Zip and then read the "MyProject" file. Everything looks OK.

Here's where the problem occurs. To open the file I do...

1. Extract the file from its location using DotNetZip...

ZipFile zip = ZipFile.Read(strfilepath);
            Directory.CreateDirectory(strTempPath);
            Path.ChangeExtension(strTempPath, ".bin");
            foreach (ZipEntry e in zip)
            {
                if (e.FileName == "MyProject")
                    e.Extract(strTempPath, ExtractExistingFileAction.OverwriteSilently);
            }

2. Next, I open the temp file (strTempPath) using FileStream and BinaryReader...

FileStream fs = new FileStream(strTempPath, FileMode.Open, FileAccess.Read);
            BinaryReader br = new BinaryReader(fs);

            strStringOne = br.ReadString();
            blBooleanOne = br.ReadBoolean();
            strStringTwo = br.ReadString();

Unfortunately, steps 1 and 2 above don't seem to execute. I'm at a loss to find out why. Is there anything wrong with the code in Step 1?

Re: C# Problem extracting file from .zip created with DotNetZip

Sascha Lefèvre28-Oct-17 13:35

Re: C# Problem extracting file from .zip created with DotNetZip

28-Oct-17 13:35

I haven't used DotNetZip yet but there are some things catching my eye, the first one most likely being the culprit (even though "don't seem to execute" isn't very specific Poke tongue | ;-P

).

This:

Path.ChangeExtension(strTempPath, ".bin");

..does nothing for you. You most probably intended this:

strTempPath = Path.ChangeExtension(strTempPath, ".bin");

Strings are immutable. When using a method that "modifies" a string you always have to use the returned version.

Most probably this line fails then:

e.Extract(strTempPath, ExtractExistingFileAction.OverwriteSilently);

..because strTempPath is still the name of the directory.

Other observations:

You're not enclosing your streams in using-blocks. Probably not the cause of your problem here but I strongly advise you to always do that. I've seen funny things happening when not doing that, which do not always immediately reveal themselves as stream issues and send you on a wild goose chase.

Don't use the same variable once for a directory name and then for a file name. It was confusing to read and I bet it will confuse you too, when you read your code again after doing different stuff for a while.

And a style suggestion: Don't use Systems Hungarian. It's not recommended by Microsoft, for a good reason, I think. If you're interested: Making Wrong Code Look Wrong – Joel on Software[^]

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Bernhard Hiller30-Oct-17 4:18

Bernhard Hiller

30-Oct-17 4:18

Also take into account that string strTempPath = Path.GetTempFileName(); creates the file on disc already - you should remove it afterwards.
Or create the temp filename your self, e.g.
string tempPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString() + ".bin");

Oh sanctissimi Wilhelmus, Theodorus, et Fredericus!

c#Move music files in listbox up or down

Member 1348924427-Oct-17 5:00

Member 13489244

27-Oct-17 5:00

Thank you all for taking your time to help.

Had an issue with adding in music files, now that is resolved. However the path to the music files is in a certain sequence. I tried to move that sequence by using remove and insert however that removes the path to the file so when I click on the file I want to play, it doesn't play. Below is the code I have just for up button. So How can I move an item in the 'path' list to move without removing it?

public partial class JukeBox : Form
    {
        private readonly List<string> paths = new List<string>();
        
        public JukeBox()
        {
            InitializeComponent();
        }

        private void btnFiles_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog1 = new OpenFileDialog();
            openFileDialog1.Multiselect = true;

            if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                paths.AddRange(openFileDialog1.FileNames);

                string[] files = openFileDialog1.SafeFileNames;
                for (int i = 0; i < files.Length; i++)
                {
                    listBox1.Items.Add(files[i]);
                }
            }
        }

        private void btnPlay_Click(object sender, EventArgs e)
        {
            axWindowsMediaPlayer1.URL = paths[listBox1.SelectedIndex];
        }

        private void btnUp_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedItems.Count > 0)
            {
                object selected = listBox1.SelectedItem;
                string lbName = listBox1.GetItemText(listBox1.SelectedItem);
                int lbIndex = listBox1.Items.IndexOf(selected);
                int lbTotal = listBox1.Items.Count;
                int pathIndex = paths.IndexOf(lbName);

                if (lbIndex == 0)
                {
                    paths.Remove(lbName);
                    paths.Insert(lbTotal - 1,lbName);
                    listBox1.Items.Remove(selected);
                    listBox1.Items.Insert(lbTotal - 1, selected);
                    listBox1.SetSelected(lbTotal - 1, true);
                }
                else
                {

                    paths.Remove(lbName);
                    paths.Insert(lbIndex - 1, lbName);
                    listBox1.Items.Remove(selected);
                    listBox1.Items.Insert(lbIndex - 1, selected);
                    listBox1.SetSelected(lbIndex - 1, true);
                }
            }
        }

Richard MacCutchan27-Oct-17 5:11

27-Oct-17 5:11

Why not use a different collection class, or a List of KeyValuePair(TKey, TValue) Structure (System.Collections.Generic)[^] items? That way you can keep your music title and file path together all the time.

Member 1348924427-Oct-17 5:18

Member 13489244

27-Oct-17 5:18

Richard,
The reason for this layout, I've tried a lot of ways to add music files to a listbox than add some more files and they wouldn't play due to out of range error. With this layout it allows me to add music files to my list box and if I want to add some more I can.

Thank you

Richard MacCutchan27-Oct-17 5:51

27-Oct-17 5:51

Yes, except it still does not work. And if you get of range errors you need to diagnose the problem and fix your code rather than just ignoring it.

Member 1348924427-Oct-17 6:18

Member 13489244

27-Oct-17 6:18

Richard,
Coming to this site doesn't mean that I was ignoring the problem, one cannot complete a task if they ignore the problems. Me coming to this site was me asking for help for an issue that I've been trying to fix for some time. I kindly ask, if you cannot help with the issue please don't reply again.

Thank you

Richard MacCutchan27-Oct-17 6:42

27-Oct-17 6:42

Well I did try to help, by suggesting a class that would make your application much easier to manage. But if you want to dismiss it out of hand that is fine with me.

Ralf Meier28-Oct-17 12:20

Ralf Meier

28-Oct-17 12:20

For your Info (if you don't know it) : with Richard you got one of the most famous members of this forum. I would suggest that you try to understand what he has suggested to you :
You can also create a Class which contains different information. This Class could be added as well to your ListBox and allows you to do what you are missing in the moment. Perhaps you re-think this ...

Richard MacCutchan28-Oct-17 22:08

28-Oct-17 22:08

jschell27-Oct-17 7:39

jschell

27-Oct-17 7:39

Member 13489244 wrote:
OpenFileDialog openFileDialog1

Perhaps there is an incorrect assumption here.

If you get a list of files from a file dialog you cannot "move" anything.
That list of files represent real resources on the OS. If you want to move a file (not an entry in the list) then you must move it. And the only way you can "move" it is by changing the directory.

If you want to change the order in a directory you must rename it.

And regardless of what you are doing if you modify the file name or location then you need to requery the OS for an updated list of files. You shouldn't attempt to modify the list yourself.

Alternatively perhaps you want to order the list based on criteria that the OS does not know about. That however is much more complicated and it REQUIRES that you store files and the additional data is some persistent data store (file, database, etc.) You would then load that, load the current file list from the OS, correlate the two and then with a brand new list that you created manage the files themselves and associated data for each file. On exit you would then update your persistent data store with changes.