Winforms C# pass variable between forms [duplicate]

Question

How do i pass name value from Form1 to Form2?

Form1

public partial class Form1 : Form
{
    public string name = "xxx";
}

Form2

public partial class Form2 : Form
{
    private void Form2_Load(object sender, EventArgs e)
    {
        lblname.Text = name;
    }
}

Solution:

Form1

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        string name = "xxx";
        Form2 frm2 = new Form2(name);
        frm2.Show();
    }
}

Form2

public partial class Form2 : Form
{
    public Form2(string name)
    {
        InitializeComponent();
        label1.Text = name;
    }
}

Asked thousand times, google your title which you should have done before you've asked this. — Tim Schmelter
– Tim Schmelter, Commented Jul 28, 2016 at 14:37
Then you need to work on your googling skills. I feel like I see this question asked (and closed as a dupe) every other day. — rory.ap
– rory.ap, Commented Jul 28, 2016 at 14:41
@Cris google.com/search?q=Winforms+C%23+pass+variable+between+forms — wa4_tasty_elephant
– wa4_tasty_elephant, Commented Jul 28, 2016 at 14:45
Frustating is to see people who don't care to invest a minimum effort on research — Matias Cicero
– Matias Cicero, Commented Jul 28, 2016 at 14:50

Matias Cicero · Accepted Answer · 2016-07-28 14:39:23Z

0

One easy but not recommended solution would be to make the field static:

public partial class Form1 : Form
{
    public static string name = "xxx";
}

Then you can simply read it from the other form:

public partial class Form2 : Form
{
    lblName.Text = Form1.name;
}

answered Jul 28, 2016 at 14:39

Matias Cicero

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2 Comments

DVK Over a year ago

Using static variables is a recipe for disaster. I've worked on forms apps written this way, and, unless you want to spend your career chasing down impossible-to-find bugs, static variables should be reserved for global, mostly-immutable data.

Matias Cicero Over a year ago

@DVK I totally agree with you. In fact, I did clarify that this is not recommended at all.

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