getting objects from a collection

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I have a class named Documents
I have a collection named class StoreObjects:List<Documents>

I am entering data into the collection from a Form1

"this is part of the code in Form1"

StoreObjects so = new StoreObjects();

d = new Documents(txtName.Text, txtSurname.Text, txtTitle.Text);
so.Add(d);

so far I managed to enter data and even display it.

What I want now is from Form2, I want to be able to search by title, if I do it from Form1 this works but from Form2 does not work

C#

so.SearchByTitle(txtTitle.Text);
            Console.WriteLine(so.foundTitle);
            if (so.foundTitle == false)
            {
                Console.WriteLine("Not Found");
            }

this is what i have in StoredObject

C#

public bool SearchByTitle(string aTitle)
        {
            foreach (Documents d in this)
            {
                if ((d != null) && (d.Title == aTitle))
                {
                    foundTitle = true;
                    Console.WriteLine(d.GetData());
                }
            }
            return foundTitle;
        }

I think that it is because of this declaration in Form 2
StoreObjects so = new StoreObjects();

how can I manage to get the results I want

Posted 11-Jan-11 7:20am

datt265

Updated 11-Jan-11 7:38am

v3

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4 solutions

Solution 1

You should probably make a static globals class that contains data that you want to make accessible from any point in your program.

-OR -

If form2 is created by form1, you can simply pass form1 as a parameter in form2's constructor, and you can accessso (as long as it's public, of course) from form 2.

Posted 11-Jan-11 7:32am

#realJSOP

Updated 11-Jan-11 7:33am

v3

Comments

datt265 11-Jan-11 13:36pm

I have tried making static, and getting errors. I am thinking that since I have to declare StoreObjects so = new StoreObjects(); again in Form2 I am created a new instance and thus I get no results. But I dont know how to make it in another way

datt265 11-Jan-11 13:42pm

Form2 is launched from Form1 when clicking a button. can you help me out on how to pass a parameter please?

Solution 2

Example of a static class:

C#

pubic static class Globals
{
    public static StoredObjects StoredObjects { get; set; }

    private Globals()
    {
        StoredObjects = new StoredObjects();
    }
}

You call it like so:

C#

if (Globals.StoredObjects != null)
{
   ...
}

Posted 11-Jan-11 7:47am

#realJSOP

Comments

fjdiewornncalwe 11-Jan-11 14:28pm

As much as I hate globals.... If it needs to be done, this is how to do it.

Solution 4

What I have done know is passing the value of 'so' from Form1 as a ref to form2 and is working. Thanks to all for the hints and the quick reply.

Posted 11-Jan-11 8:53am

datt265

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**Orcun Iyigun** · Accepted Answer · 2011-01-11T08:07:00

this is an example to pass a listview and a combobox control;
on your click event;

{
   Form2 form2 = new Form2(lvTest1, cmbTest2);
   form2.ShowDialog(this);
}

under the form2.cs

public partial class Form2 : Form
    {
        ListView lv = new ListView();
        ComboBox cb = new ComboBox();
        public Form2(ListView lvParents, ComboBox cbParent)
        {
            InitializeComponent();
            lv = lvParents;
            cb = cbParent;
        }
     }

so you can modify your code, based on given example.