Retrieving Data from label to MessageBox

Question

I use OpenFileDialog to open and read a file into my application to display specific data. I have multiple Forms - 2/3 of which I need to be able to display the value that is read from the file into a label. At the moment, I have just hard-coded some data into a label and using a Get Set method, I am able to get the value. However, when I have tried to get the label value when data is populated from a file, nothing returns.

In Form1.cs:

internal string GetSetBarcode
{
    get
    {
        // Barcode label
        return this.label36.Text;
    }
    private set
    {
        this.label36.Text = value;
    }
}

Retrieve Value from File:

// Currently working on a new method to populate data more appropriately as this is not the best, but it works for now.

string result = System.Text.Encoding.UTF8.GetString(box);
string r = Regex.Replace(result, "[^a-zA-Z0-9 .-]", string.Empty);

for (int i = 0; i < r.Length; i++)
{
    for (int b = 11; i < b; i++) // Product Code
    {
        label7.Text += r[i];
    }
}

In Barcode.cs:

Form1 f1 = new Form1();
MessageBox.Show(f1.GetSetBarcode); // For testing purposes... But this returns 0 :(

Verify that you are referring to correct label (i.e. you set the value on label36.Text before accessing it.) Because i have tested your given scenario and it work for me. — Ramashankar, Dec 17 '13 at 09:05
Seems odd, and not the whole picture. The line `Form1 f1 = new Form1();` is only creating a new form instance. What then causes "Retrieve Value from File" to happen? Is it in the Form's constructor? Called by a method _that is in the constructor_? I see nothing that would cause `GetSetBarcode` to be populated with anything but the default value (which is why hard-coding it _works_). — DonBoitnott, Dec 18 '13 at 12:51

score 0 · Answer 1 · edited May 23 '17 at 11:49

0

Mhh normally you must no do like this , it's better don't do that . You should see here . They have maybe a solution for you ;-)

how-to-access-winform-textbox-control-from-another-class

edited May 23 '17 at 11:49

Community

1
1

answered Dec 17 '13 at 08:59

Mehdi Bugnard

3,889
4
45
86

score 0 · Answer 2 · answered Dec 17 '13 at 09:03

0

I've tested your given scenario and it work for me. I think your problem is where you hardcode the data in your test into the label. Do you do it at Form_Load-Event? Because the load event only occurs after form.Show(); If you hardcode the labeltext in the designer or at the forms constructor it works ;)

hope I could help you ^^

answered Dec 17 '13 at 09:03

DJmRek

378
6
13

Please let me know if you found your mistake or not ^^ – DJmRek Dec 17 '13 at 09:06
Yes, if I hard-code it using the designer it does work! Still not found a way around it, so gonna play with other stuff and come back to it and probably post an update :) – lornasw93 Dec 18 '13 at 10:37
Let me hear if you have any other problems ;) – DJmRek Dec 18 '13 at 12:56

score 0 · Accepted Answer · edited May 23 '17 at 12:28

0

I managed to come up with a solution, see https://stackoverflow.com/a/21310270/2952390 (answer to a related question I asked previously). Here it retrieves text from a combobox to a label on another form. Much easier than I thought it would be.

edited May 23 '17 at 12:28

Community

1
1

answered Jan 27 '14 at 14:40

lornasw93

182
4
26

Retrieving Data from label to MessageBox

In Form1.cs:

Retrieve Value from File:

In Barcode.cs:

3 Answers3