Send values from one form to another form

Question

I want to pass values between two Forms (c#). How can I do it?

I have two forms: Form1 and Form2.

Form1 contains one button. When I click on that button, Fo

Answer 1

In this code, you pass a text to Form2. Form2 shows that text in textBox1. User types new text into textBox1 and presses the submit button. Form1 grabs that text and shows it in a textbox on Form1.

public class Form2 : Form
{
    private string oldText;

    public Form2(string newText):this()
    {
        oldText = newText;
        btnSubmit.DialogResult = DialogResult.OK;
    }

    private void Form2_Load(object sender, EventArgs e)
    {
        textBox1.Text = oldText;
    }

    public string getText()
    {
        return textBox1.Text;
    }

    private void textBox1_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Enter)
        {
            DialogResult = System.Windows.Forms.DialogResult.OK;
        }
    }
}

And this is Form1 code:

public class Form1:Form
{
    using (Form2 dialogForm = new Form2("old text to show in Form2"))
    {
        DialogResult dr = dialogForm.ShowDialog(this);
        if (dr == DialogResult.OK)
        {
            tbSubmittedText = dialogForm.getText();
        }
        dialogForm.Close();
    }
}

Answer 2

This is very simple. suppose you have 2 window form Form1 and Form2 and you want to send record of textbox1 from Form1 to Form2 and display this record in label1 of Form2; then in Form2 create a label which name is label1 and go to the property of label1 and set 'Modifiers'=public and in Form one create a textBox with id textBox1 and a button of name submit then write the following code on button click event

button1_Click(object sender, EventArgs e)
{
  Form2 obj=new Form2();
  obj.label1.text=textBox1.text.ToString();
  obj.show();
}

thats it... for this way you can bind dataset record to another form's datagridview......

Answer 3

Ok so Form1 has a textbox, first of all you have to set this Form1 textbox to public in textbox property.

Code Form1:

Public button1_click()
{
    Form2 secondForm = new Form2(this);
    secondForm.Show();
}

Pass Form1 as this in the constructor.

Code Form2:

Private Form1 _firstForm;

Public Form2(Form1 firstForm)
{
    _firstForm = firstForm:
}

Public button_click()
{
    _firstForm.textBox.text=label1.text;
    This.Close();
}

Answer 4

There are several solutions to this but this is the pattern I tend to use.

// Form 1
// inside the button click event
using(Form2 form2 = new Form2()) 
{
    if(form2.ShowDialog() == DialogResult.OK) 
    {
        someControlOnForm1.Text = form2.TheValue;
    }
}

And...

// Inside Form2
// Create a public property to serve the value
public string TheValue 
{
    get { return someTextBoxOnForm2.Text; }
}

Answer 5

you can pass as parameter the textbox of the Form1, like this:

On Form 1 buttom handler:

private void button2_Click(object sender, EventArgs e)
{
Form2 newWindow = new Form2(textBoxForReturnValue);
newWindow.Show(); 
}

On the Form 2

public static TextBox textBox2; // class atribute

public Form2(TextBox textBoxForReturnValue)
{
    textBox2= textBoxForReturnValue;
}

private void btnClose_Click(object sender, EventArgs e)
{

    textBox2.Text = dataGridView1.CurrentCell.Value.ToString().Trim();
    this.Close();
}

Answer 6

if you change Modifiers Property of a control in a Form to Public, another Forms can access to that control. f.e. :

    Form2 frm;
    private void Form1_Load(object sender, EventArgs e)
    {
        frm = new Form2();
        frm.Show();
    }
    private void button1_Click(object sender, EventArgs e)
    {
        MessageBox.Show(frm.txtUserName.Text); 
        //txtUserName is a TextBox with Modifiers=Public        
    }