Member Avatar for Don_leon

How do get the content(Text or Numbers) of a text box in a windows form and take it to the next windows form and use it there.

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  • Latest Post Latest Post by Geekitygeek

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A few simple, practical patterns beyond the constructor trick already suggested by (and the parent-reference option from ). Each fits different needs: one-way handoff, synchronous return, or live two-way updates.

Property (simple one-way)
Set a public property on the child before showing it; the child reads that property on Load.

// Form2
public string IncomingText { get; set; }

public Form2()
{
    InitializeComponent();
}

private void Form2_Load(object sender, EventArgs e)
{
    textBox1.Text = IncomingText ?? string.Empty;
}

// Caller
var f2 = new Form2 { IncomingText = textBox1.Text };
f2.Show();

Modal return (caller reads a result after the dialog closes)
Use ShowDialog and a public Result property on the child. This is good when the parent needs a value back immediately after the child closes.

// Form2
public string ResultText { get; private set; }

private void okButton_Click(object sender, EventArgs e)
{
    ResultText = textBox1.Text;
    DialogResult = DialogResult.OK;
    Close();
}

// Caller
using (var f2 = new Form2())
{
    if (f2.ShowDialog(this) == DialogResult.OK)
        textBox1.Text = f2.ResultText;
}

Event/callback (decoupled two-way communication)
Expose an event or use an interface so the child can notify the parent without holding a concrete reference.

// Form2
public event EventHandler<ValueEventArgs> ValueSubmitted;

private void sendButton_Click(object sender, EventArgs e)
{
    ValueSubmitted?.Invoke(this, new ValueEventArgs { Value = textBox1.Text });
    Close();
}

// Caller
var f2 = new Form2();
f2.ValueSubmitted += (s, ev) => textBox1.Text = ev.Value;
f2.Show();

Tips and cautions: prefer constructor/property for simple transfers, ShowDialog for synchronous returns, events/interfaces for decoupling. Avoid static globals for passing values. Always call InitializeComponent() before touching controls; unsubscribe events if lifetimes differ to prevent leaks.

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Member Avatar for AngelicOne

pass the textbox as a parameter which will be used in form2

Form1

form2 form2 = new form2(textBox1.Text)
form2.Show();

Then make a new constructor for the other form, with string parameter and assign this parameter to your textbox (form2).

Form2

Form2(string parameter)
{
textBox1.Text = parameter;
}
Edited by AngelicOne because: n/a
Member Avatar for Don_leon

Thanx a lot AngelicOne

Member Avatar for AngelicOne

Sorry but form2 is incorrect. Put the new constructor where initializecomponent is..

Form2(string parameter)
{
InitializeComponent();
textBox1.Text = parameter;
}
Member Avatar for gauravk_bhanot

something similar how to send back information to the calling form

Member Avatar for Geekitygeek

if you want to pass information back and forth the easiest way is to pass a reference to the parent form into the child form. See my tutorial.

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