Better way to handle 50 labels - C# Discussion Boards

First Prev Next

Re: want to insert leave dates for weekdays excluding weekends from given date range using c# ASP.net

OriginalGriff23-Sep-20 22:00

OriginalGriff

23-Sep-20 22:00

shwetaliv wrote:
Can anyone please share sample code for same.

We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us to do it all for you.

So we need you to do the work, and we will help you when you get stuck. That doesn't mean we will give you a step by step solution you can hand in!
Start by explaining where you are at the moment, and what the next step in the process is. Then tell us what you have tried to get that next step working, and what happened when you did.

"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!

Re: want to insert leave dates for weekdays excluding weekends from given date range using c# ASP.net

shwetaliv23-Sep-20 23:50

shwetaliv

23-Sep-20 23:50

Thanks for all support .Working on my system further improvements.

Re: want to insert leave dates for weekdays excluding weekends from given date range using c# ASP.net

OriginalGriff23-Sep-20 23:54

OriginalGriff

23-Sep-20 23:54

You're welcome.

Good luck with your task.

Message Removed

22-Sep-20 9:56

Nelek

22-Sep-20 9:56

Message Removed

modified 24-Sep-20 15:26pm.

Message Removed

23-Sep-20 6:44

Richard MacCutchan

23-Sep-20 6:44

Message Removed

modified 24-Sep-20 15:26pm.

WPF design UI

Member 1493238422-Sep-20 5:55

Member 14932384

22-Sep-20 5:55

z2088465339755_893e6162b62e09719b4470067613f29b.jpg - Google Drive[^]

i want to create a image menu like the above image. i also tried using image button, but i dont know how to insert the arrow shapes.
Please help to advice. Thankyou

Re: WPF design UI

Gerry Schmitz22-Sep-20 6:28

Gerry Schmitz

22-Sep-20 6:28

The arrow is triangle which is a polygon.

.net - Draw solid color triangle using XAML only - Stack Overflow

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Better way to handle 50 labels

Member 1494373721-Sep-20 14:54

Member 14943737

21-Sep-20 14:54

Hi,

I am fairly new to C#.I am currently writing a windows form program with 50 labels created on the form. I would like to know if there is a better way to change the label's backcolor according to the input number by the user. I am currently using Switch to do it. It makes the coding long and hard to read.

Appreciated if someone can give me advice on this.

My labels are named from label01 ..... label50

Thanks,
John

Re: Better way to handle 50 labels

Richard Andrew x6421-Sep-20 16:12

Richard Andrew x64

21-Sep-20 16:12

You could add all the labels to a List<> object or an array.

That way you can refer to each one by index notation:

Labels[5].BackColor = Color.Green;

The difficult we do right away...
...the impossible takes slightly longer.

Re: Better way to handle 50 labels

OriginalGriff21-Sep-20 20:58

OriginalGriff

21-Sep-20 20:58

One way is to add the number to the Label.Tag property - every Control has one, and it's a "free object" variable that is for the designer to use as he will.
You can then access each label very easily:

Label lab = Controls.OfType<Label>().FirstOrDefault(c => Convert.ToInt32(c.Tag) == 2);
lab.Text = "Hello";

You could just use the Label.Name property, but that's messier as the VS default names do not have zero padded numbers:

Label1
Label2
...
Label10
Label11
...

So you'd need a substring and to rely on the names being in the right order on screen:

Label lab = Controls.OfType<Label>().FirstOrDefault(c => Convert.ToInt32(c.Name.Substring(5)) == 2);
lab.Text = "Hello";

modified 22-Sep-20 6:08am.

Re: Better way to handle 50 labels

Gerry Schmitz22-Sep-20 6:45

Gerry Schmitz

22-Sep-20 6:45

You've mentioned: labels, background color, an input number and a switch. If you explain how all this fits together, you'll probably get a better answer.

e.g. Are all labels colored the same based on some choice? Or does every label get their own number? etc.

Most projects fail due to inadequate specs.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Re: Better way to handle 50 labels

BillWoodruff22-Sep-20 7:59

BillWoodruff

22-Sep-20 7:59

As an alternative to the excellent example posted by OriginalGriff, I'd like to demonstrate how easy it is to make a Component [^] that "bakes in" the functionality you describe; the Component is derived from Label:

... you might ask: why go to all this trouble ? D'Oh! | :doh:

I assert that mastery of using custom (inherited) WinForm Controls is a very valuable skill that can help with code encapsulation, and "separation of concerns" ...

0 as you may know: a Component is created using the Project/Add Component menu choice, and, like a UserControl, will appear in the Toolbar.

... this Component, AutoNumberedLabel ...

1 keeps a static Dictionary <int, AutoNumberedLabel> which is updated automatically each time you create an instance by drag-dropping from toolbar, or, in code.

2 provides a method that looks up the AutoNumberedLabel instance from an integer parameter..

3 provides a public read-only property that holds the AutoNumberedLabel's integer id.

4 provides a public method that sets the AutoNumberedLabel's BackColor

using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace YourNameSpace
{
    public partial class AutoNumberedLabel : Label
    {
        public AutoNumberedLabel()
        {
            InitializeComponent();
        }
        
        // this constructor is called when the control is created at run-time
        public AutoNumberedLabel(IContainer container)
        {
            container.Add(this);

            InitializeComponent();

            LabelId = lblId;

            IntToLabel.Add(lblId++, this);
        }

        static Dictionary<int, AutoNumberedLabel> IntToLabel = new Dictionary<int, AutoNumberedLabel>();

        static int lblId = 0;

        public int LabelId { get; }

        public static AutoNumberedLabel GetLabelByID(int id)
        {
            if (IntToLabel.ContainsKey(id))
            {
                return IntToLabel[id];
            }

            throw new KeyNotFoundException();
        }

        public static void SetLabelColorByID(int id, Color color)
        {
            if (IntToLabel.ContainsKey(id))
            {
               IntToLabel[id].BackColor =  color;
               return;
            }

            throw new KeyNotFoundException();
        }
    }
}

Here's how you might use this, assuming you've assigned all your AutoNumberedLabels the same Click Eventhandler:

private void autoNumberedLabel_Click(object sender, EventArgs e)
{
    AutoNumberedLabel lbl = (AutoNumberedLabel) sender;
    
    int Id = lbl.LabelId;

    // test if a round-trip works
    AutoNumberedLabel lbl2 = AutoNumberedLabel.GetLabelByID(Id);
    if(lbl2 != lbl) throw new ArgumentException();

    AutoNumberedLabel.SetLabelColorByID(Id, Color.Gold);
}

«One day it will have to be officially admitted that what we have christened reality is an even greater illusion than the world of dreams.» Salvador Dali

modified 22-Sep-20 23:59pm.

Re: Better way to handle 50 labels

Mycroft Holmes22-Sep-20 12:20

Mycroft Holmes

22-Sep-20 12:20

I always named the controls with the same number suffix therefore the label and the input control the same suffix eg cboState05 would be related to label05.

So then you have a function to extract the number from the control and concatenate the label name.

Never underestimate the power of human stupidity -
RAH
I'm old. I know stuff - JSOP

Re: Better way to handle 50 labels

Member 149437371-Oct-20 18:52

Member 14943737

1-Oct-20 18:52

Thanks to all. I have solved the problem, you guys have been very helpful.

Re: Better way to handle 50 labels

Member 1494373728-Sep-20 13:41

Member 14943737

28-Sep-20 13:41

Thanks guys for the help. I have found the solution to it.

Complex View Model with Nested class Properties / Array Submit

Guillermo Perez18-Sep-20 15:50

Guillermo Perez

18-Sep-20 15:50

I'm sorry to bother you, I just have a question regarding how to validate a list of object when is inside other list... I do have a list of cities, each city has another list of zones, an example could be like this:

public class City
{
        public int Id { get; set; }        
        public string CityName { get; set; }
        public virtual List<Zone> Zones { get; set; } = new List<Zone>();
}

public class Zone
 {
        public int Id { get; set; }
        public string ZoneName { get; set; }

        public int CityId { get; set; }
        public virtual City City { get; set; }
}

Now, as you can see, the City is the principal and the Zone is the dependent class. Now I decided to pass what I have into my database to a view with a form to make changes to these Cities and their Zones, so I created a view model like this:

public class SettingsModel
    {
        public City NewCity { get; set; }
        public List<City> CurrentCities { get; set; }
    }

The first property is to create a new City that is not in the db. The other list contains the Cities already in the database. So I started by creating a list of forms using a for loop (not foreach) that uses an index. At the end, it produces something like this:

HTML

<form method="post" action="/Administration/UpdateCity">
...
<input type="hidden" id="CurrentCities_0__Id" name="CurrentCities[0].Id" value="7">
<input type="text"  id="CurrentCities_0__CityName" name="CurrentCities[0].CityName" value="Austin">
...
</form>
...
<form method="post" action="/Administration/UpdateCity">
...
<input type="hidden" id="CurrentCities_1__Id" name="CurrentCities[1].Id" value="4">
<input type="text"  id="CurrentCities_1__CityName" name="CurrentCities[1].CityName" value="Dallas">
...
</form>

as far as I understand, in the receiving action method (POST), I should use the [Bind(Prefix="CurrentCities")] to remove the unnecessary class name of the field name and, should specify a list<city> (or IEnumerable or Array) to tell that the object received is an array. in other words:

public IActionResult UpdateCity([Bind(Prefix = "CurrentCities")]List<City> myCity) 
{
...
}

My question is: When I try to add a form in the same way for the Zones property of City, I end with the form fields named as:

HTML

<input type="text" id="CurrentCities_0__Zones_0__ZoneName" name="CurrentCities[0].Zones[0].ZoneName" value="Austin Metro Area">
...
<input type="text" id="CurrentCities_1__Zones_0__ZoneName" name="CurrentCities[1].Zones[0].ZoneName" value="San Antonio Metro Area">

As you can see, now all the fields have an extra index indicator like this "CurrentCities[0].Zones[0]" and I was wondering, how can I get this object in the POST action method? how can I specify a Bind Prefix of this kind? and how could I specify that the item is a collection item of other collection item?? Please help and thank you for your patience!

Re: Complex View Model with Nested class Properties / Array Submit

Richard MacCutchan18-Sep-20 21:47

Richard MacCutchan

18-Sep-20 21:47

You posted this also in the ASP.NET forum. Please do not crosspost.

Re: Complex View Model with Nested class Properties / Array Submit

Gerry Schmitz19-Sep-20 2:43

Gerry Schmitz

19-Sep-20 2:43

There, you nailed it. In web interfaces, there is no (well-known) pattern that will allow you to (reasonably) add or update more than one record at a time.

It's:

Add a city
Add a zone
Add another zone
Add another city
Add a zone
Edit a city
Edit a zone.

The classic Edit and Delete action per row. 1st gen client-server.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Insert on database contents of word file using OpenXML and c#

cms965118-Sep-20 8:40

cms9651

18-Sep-20 8:40

Hello, I need your help.

I want to read a .docx file line by line and insert chapters and paragraphs of the chapter in database table.

I have tried using Microsoft.Office.Interop.Word to read the document, without success because Office may exhibit unstable behavior and/or deadlock when Office is run in this environment.

Now I read on google that the suitable tool for this is OpenXML.

My file.docx is divided for chapters and paragraphs of the chapter

The structure of file.docx

Chapter 1 - Events
-alert or disservices
-significant activities

Chapter 2 – Safety
-near miss
-security checks

Chapter 3 – Training
-environment
-upkeep

I need insert on database table according with this schema

https://i.stack.imgur.com/41YQL.png[^]

How to do resolve this?

Thanks in advance for any help or suggestion

Chevy

DROP TABLE IF EXISTS `chapters`;
CREATE TABLE `chapters` (
  `chapter` longtext CHARACTER SET utf8 COLLATE utf8_general_ci,
  `subheading` longtext CHARACTER SET utf8 COLLATE utf8_general_ci,
  `contents` longtext CHARACTER SET utf8 COLLATE utf8_general_ci,
  `sID` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`sID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Re: Insert on database contents of word file using OpenXML and c#

Gerry Schmitz18-Sep-20 9:36

Gerry Schmitz

18-Sep-20 9:36

I don't know about "OpenXML", but if you save your docx in MS Word as a "Word XML document", you can actually "see" the xml and make sense of your document if you then open it in Xml Notepad, for example.

("OpenXml" seems to have it's own internal "non-xml" format. Bizarre).

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Re: Insert on database contents of word file using OpenXML and c#

cms965118-Sep-20 9:52

cms9651

18-Sep-20 9:52

Thanks for suggestion, do you have any example for me?
The Google search is empty...

Re: Insert on database contents of word file using OpenXML and c#

Gerry Schmitz18-Sep-20 11:18

Gerry Schmitz

18-Sep-20 11:18

Which part?

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Re: Insert on database contents of word file using OpenXML and c#

cms965118-Sep-20 20:13

cms9651

18-Sep-20 20:13

Don't have found anything for my case in OpenXML tutorials with Google search

Re: Insert on database contents of word file using OpenXML and c#

Dave Kreskowiak18-Sep-20 18:45

Dave Kreskowiak

18-Sep-20 18:45