C# Discussion Boards - CodeProject

solutionsville6-Jul-18 4:28

6-Jul-18 4:28

The crash that occurs occasionally. Is Exception Unhandled System.IndexOutOfRangeException: 'Index was outside of the bounds of the array.'. This occursis an at the GetCnaInfo(CNA cna) of the code I previously posted, where it reads updates.Add(qb.Query);.

I have stepped thru the code, set break points where the query starts, and I am not finding what the issues is that is causing the IndexOutOfRangeException.

Sometimes this will run all the way thru the routine and not error. Clear the field in the database and run the routine again and then I get this error.

Thanks,

Re: MultiThreading help

Dave Kreskowiak6-Jul-18 4:51

Dave Kreskowiak

6-Jul-18 4:51

Well, this is definitely not a thread pool or "number of threads" issue. This is more of a data management and control problem.

That means, it seems like one thread is removing items from an array and another thread is asking for an item at an index that doesn't exist anymore.

The calls to Thread.Sleep lead me to believe that the code is poorly written in the first place. The Sleeps were put in there as a naive way of getting around a problem that the original coder didn't understand. Thread.Sleep should never be used in the code you've posted.

You said the problem shows up at updates.Add(qb.Query). I have no idea what that QueryBuilder class is and that seems like what would be throwing the exception.

The reference to updates.Add is just a List<string> and that will not throw the exception. The array bounds are managed internally by the List class and never fail like your exception describes.

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Seriously, go read these articles.

Dave Kreskowiak

modified 6-Jul-18 11:06am.

Re: MultiThreading help

solutionsville10-Jul-18 2:59

solutionsville

10-Jul-18 2:59

Thank you Dave, that helps me on where to look.

Much appreciated.

Re: MultiThreading help

OriginalGriff5-Jul-18 19:45

OriginalGriff

5-Jul-18 19:45

To add to what Dave said, while there are limits to how many threads can be created and that varies according to your OS, 32 /64 bit selection, and the required thread stack size, but for a 64 bit system, it's possible to generate in excess of 50,000 threads from a single process.
There is an interesting explanation here: Pushing the Limits of Windows: Processes and Threads – Mark's Blog[^]

But the more important question would be "why the elephant would you even try to generate that many threads, give that you probably only have 4 or 8 cores to run them on?".

And in your case, why do you think it's hitting a thread limit? What have you done that leads you to that conclusion? Why has it "suddenly" started happening? Or did it ever work? Is his code finished and tested?

I'd start with those questions before I even thought about changing the code in any way...

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How To solve Unity.Instance.Resolve(new ResolverOverride[]

Member 110561804-Jul-18 4:56

Member 11056180

4-Jul-18 4:56

public Invoice(InvoicePresentation pmodel)
{
    this.InitializeComponent();
    this._pmodel = pmodel;
    base.InitialFocus = this.txtBarcode;
    this.pauseForm = new PauseEntry();
    this.pauseForm.StartPosition = FormStartPosition.CenterParent;
    this._itemActionsView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._customerActionsView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._invoiceActionsView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._taskActionsView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._toolsActionsView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._returnActionsView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._taskPad1X10View = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._invoiceActionsForCCView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._invoiceActionsForDSView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._taskActionsForDSView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });
    this._taskActionsForCCView = Unity.Instance.Resolve(new ResolverOverride[]
    {
        new ParameterOverride("invoiceUI", this)
    });

Unity Class

public class Unity
 {
private static readonly IUnityContainer _instance = new UnityContainer();
public static IUnityContainer Instance { get{ return Unity._instance; 
}
 }

but Error Show

Quote:
Error 77 'Microsoft.Practices.Unity.IUnityContainer' does not contain a definition for 'Resolve' and the best extension method overload 'Microsoft.Practices.Unity.UnityContainerExtensions.Resolve(Microsoft.Practices.Unity.IUnityContainer, System.Type, params Microsoft.Practices.Unity.ResolverOverride[])' has some invalid arguments

Re: How To solve Unity.Instance.Resolve(new ResolverOverride[]

Richard Deeming4-Jul-18 7:32

Richard Deeming

4-Jul-18 7:32

Member 11056180 wrote:
UnityContainerExtensions.Resolve(this IUnityContainer, Type, params ResolverOverride[])

Member 11056180 wrote:

Unity.Instance.Resolve(new ResolverOverride[] { ... });

The first parameter to the extension method (other than the "this" parameter it extends) needs to be a Type.

You are passing an array of ResolverOverride objects.

Change your code to pass the required Type as the first parameter.

Unity.Instance.Resolve(typeof(TheRequiredType), new ResolverOverride[] { ... });

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Filter records between two dates( using two datepicker) from text file in c#

Mohamed Fahad M4-Jul-18 2:20

Mohamed Fahad M

4-Jul-18 2:20

i dont know how to code it

Re: Filter records between two dates( using two datepicker) from text file in c#

Pete O'Hanlon4-Jul-18 2:32

Pete O'Hanlon

4-Jul-18 2:32

Which bit don't you know how to code? Have you got code to read the file in? What format is it in? Are the dates in the file in a meaningful format? Are you reading the data into a meaningful structure in some way?

This space for rent

MaskedTextBox Focus ?

ibrahimayhans3-Jul-18 1:42

ibrahimayhans

3-Jul-18 1:42

Hi,
I am developing applications on C # WinForm
Using MaskedTextBox and Mask Structure (999) 000 00 00 I use
Only when the user clicks with the mouse, it focuses on the pressed point
This Data Entry Is Incorrect and Incomplete
MaskedTextBox with User Mouse and Tab How I Can Focus on the Top of the Beginning
I look forward to helping you in this regard
Best Regards...

Re: MaskedTextBox Focus ?

OriginalGriff3-Jul-18 2:19

OriginalGriff

3-Jul-18 2:19

I'm sorry, but that makes no sense at all to me.
Perhaps an example would help?

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Re: MaskedTextBox Focus ?

ibrahimayhans3-Jul-18 2:33

ibrahimayhans

3-Jul-18 2:33

But a Right Situation and a Problem
When I'm Clicked and Moved to the Mouse How Can I Trigger the Home Key?
SendKeys.Send("{HOME}");
It does not seem like it

Re: MaskedTextBox Focus ?

Eddy Vluggen3-Jul-18 2:31

Eddy Vluggen

3-Jul-18 2:31

ibrahimayhans wrote:
Only when the user clicks with the mouse, it focuses on the pressed point
This Data Entry Is Incorrect and Incomplete

Your perception is incorrect. The described behaviour is default in Windows, and Windows apps should adhere to the standard.

ibrahimayhans wrote:
MaskedTextBox with User Mouse and Tab How I Can Focus on the Top of the Beginning

If you tab into it, you are at the beginning.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

Re: MaskedTextBox Focus ?

ibrahimayhans3-Jul-18 2:34

ibrahimayhans

3-Jul-18 2:34

I'm Into Content With TAB
Only User Uses Mouse Sometimes
There are such Problems when you click

Re: MaskedTextBox Focus ?

Eddy Vluggen3-Jul-18 2:37

Eddy Vluggen

3-Jul-18 2:37

ibrahimayhans wrote:
Only User Uses Mouse Sometimes
There are such Problems when you click

It is not a problem, it is how it is supposed to work. When activating a control with the mouse, the cursor does not go to the start but where you select. All controls work like that. Making it work differently means unexpected behaviour.

Also, someone doing data-entry does not move to the next control using the mouse, it would make for very inefficient data-entry.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

Re: MaskedTextBox Focus ?

Alan N3-Jul-18 3:29

Alan N

3-Jul-18 3:29

I think you are asking how to move the textbox caret to position 0 when the empty textbox is clicked.

The first part is to get the empty state of the maskedtextbox before any data has been entered. At that point the Text property value is not String.Empty but a representation of the mask. This 'empty' text can be obtained by capturing the Text when the MaskChanged event fires. For your example it is

"(   )        "

The second part is picking a suitable place to move the caret. When an unfocussed textbox is clicked the sequence of Enter, GotFocus and Click events occur. You'll find that attempting to set the caret position in either the Enter or GotFocus events will fail and changes must be made in the Click event handler.

Combining that information gives some prototype code

private String emptyText;

private void MaskedTextBox_MaskChanged(object sender, EventArgs e) {
  // Capture the empty text
  MaskedTextBox mtbx = (MaskedTextBox)sender;
  emptyText = mtbx.Text;
}

private void MaskedTextBox_Click(object sender, EventArgs e) {
  MaskedTextBox mtbx = (MaskedTextBox)sender;
  String currentText = mtbx.Text;
  if (currentText == emptyText) {
    // Move the caret to the start of the line
    mtbx.Select(0, 0);
  }
}

EDIT : Correct operation of this code requires that the MaskChanged event handler is attached before the Mask is set.
Alan.

Following Jose Menendez Póo Calendar project

Member 128234452-Jul-18 18:44

Member 12823445

2-Jul-18 18:44

Hello everyone and specially Jose Menendez Póo, author of the

Quote:
A Professional Calendar/Agenda View That You Will Use

article.

I must say that I'm overwhelmed by its complexity and beauty.
I wonder if any of you, who are familiar with this project, have any kind of written stuff or any kind of notes explaining the project in some details.
Also, the project uses a utility class of the name

Quote:
System.Windows.Forms.Calendar.dll

and I wonder again if the class is ever published, or if any of you have access to it in the non compiled version, So I can study it.

I hope to get an answer here.
Thank you all,
Mark

Re: Following Jose Menendez Póo Calendar project

Peter_in_27802-Jul-18 19:34

Peter_in_2780

2-Jul-18 19:34

The place for asking about things from an article is the discussion at the foot of the article itself. Here, you're hoping the author might stumble across your message. There, he will be notified of your inquiry.

Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012

Re: Following Jose Menendez Póo Calendar project

OriginalGriff2-Jul-18 20:51

OriginalGriff

2-Jul-18 20:51

Member 12823445 wrote:
if the class is ever published, or if any of you have access to it in the non compiled version

If it's part of .NET, then it's in the Reference Source[^]

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Re: Following Jose Menendez Póo Calendar project

Eddy Vluggen2-Jul-18 23:21

Eddy Vluggen

2-Jul-18 23:21

To add to what Griff said; you can easily decompile any .NET assembly. I'm using ILSpy, but there are more alternatives.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

It must parse string numbers to integer but it's out is zero

Member 138946071-Jul-18 20:49

Member 13894607

1-Jul-18 20:49

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp5
{
    class Parser
    {
        public int res;
        char element_of_arr;
        string text;
        public Parser(string input)
        {
            text = input;
        }
        public int String_Parser()
        {
            for (int i = 0; i != text.Length; i++)
            {
                char element_of_arr = text[i];
                switch (element_of_arr)
                {
                    case '1':
                        res *= 10 + 1;
                        break;
                    case '2':
                        res *= 10 + 2;
                        break;
                    case '3':
                        res *= 10 + 3;
                        break;
                    case '4':
                        res *= 10 + 4;
                        break;
                    case '5':
                        res *= 10 + 5;
                        break;
                    case '6':
                        res *= 10 + 6;
                        break;
                    case '7':
                        res *= 10 + 7;
                        break;
                    case '8':
                        res *= 10 + 8;
                        break;
                    case '9':
                        res *= 10 + 9;
                        break;
                    case '0':
                        res *= 10;
                        break;
                    //case '.':
                    //    res *= 10;
                    //    break;
                }
            }
            return res;
        }
    }
    class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("Write digits");
            string input = Console.ReadLine();
            Console.WriteLine("Try parse it...");
            Parser text = new Parser(input);
            Console.WriteLine(text.String_Parser());
            Console.ReadKey();
        }
    }
}

Re: It must parse string numbers to integer but it's out is zero

Richard MacCutchan1-Jul-18 21:37

Richard MacCutchan

1-Jul-18 21:37

Your calculations are wrong res *= 10 + 3; is the same as res *= 13; But you do not need that switch statement, just replace it with:

res *= 10;
res += element_of_arr - '0';

Re: It must parse string numbers to integer but it's out is zero

OriginalGriff1-Jul-18 21:39

OriginalGriff

1-Jul-18 21:39

res is integer, which is a value type - so it's default value is zero.
When you do this:

res *= 10 + 1;

You are effectively saying this:

res = res * (10 + 1);

Not

res = (res * 10) + 1;

So if you start with zero, you will always get zero as a result.

But is there a good reason why you don't just use int.TryParse:

Console.WriteLine("Try parse it...");
int result;
if (int.TryParse(input, out result))
    {
    Console.WriteLine(result);
    }
else
    {
    Console.WriteLine(string.Format("\"{0}\" is not a valid integer", input));
    }

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Member 1389187630-Jun-18 7:18

Member 13891876

30-Jun-18 7:18

Moving code from form to form

Re: c#

Pete O'Hanlon30-Jun-18 8:03

Pete O'Hanlon

30-Jun-18 8:03

E-i-e-i-o

This space for rent

Re: c#

Dave Kreskowiak30-Jun-18 14:26

Dave Kreskowiak

30-Jun-18 14:26

Your minimalist approach to asking questions and describing problems does nothing for you at all.

It's simply not possible to provide you any helpful information because nobody has any clue what you're talking about!

Asking questions is a skill
CodeProject Forum Guidelines
Google: C# How to debug code
Seriously, go read these articles.

Dave Kreskowiak

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