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  • Status: Solved
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Carrying a variable between forms

Good afternoon,

Here's the scenario:

I have two forms, Form1 and Form2.  A variable "A" is attached to a text box on Form1, we'll call it txtTest.text.  How do I carry that varible over to display it's contents in Form2?  Example:


string A = txtTest.text;


txtWhatever.text = A; // Variable from Form1
1 Solution
You have two ways - use Remoting across context boundaries, or store the variable in a persistent store and reference that store on both sides - file, table, etc.

Ping if you need more info
fattumsdadAuthor Commented:

I'm fairly new to this, so a walkthough would be extremely helpful :)
Mohammed NasmanSoftware DeveloperCommented:

  Here's a quick sample for showing form2 then get the value that put in the textbox
but you need to change the Modifiers property of txtTest to public to be able to access it's value from other forms

      Form2 frm = new Form2();

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fattumsdadAuthor Commented:
I'm getting an error that says "      Error      1            The name 'frm' does not exist in the current context
Mohammed NasmanSoftware DeveloperCommented:
did you declare it as
Form2 frm = new Form2();
fattumsdadAuthor Commented:
Yes, it is declared as you said.  It looks like using MessageBox.Show(frm.txtTest.Text); would take the text from "txtTest" that is located on "frm" (which is Form2).  I'm trying to take the text from "txtTest" on Form1....  I could be confused, as I said I'm pretty new to this...  
Easy way to do this:

In your Form1, add a reference to Form2 using:

private Form2 form2 = null;

then add a TextChanged event:

this.txtTest.TextChanged += new System.EventHandler(this.updateRefText);


private void updateRefText(object sender, EventArgs e)
      if(this.form2 != null)
            form2.refText = this.textBox1.Text;

Now in form2, simply add:

public string refText
      {      this.textBox1.Text = value;      }

And you're done.



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