Passing Text Value to another form textbox

Question

0.00/5 (No votes)

See more:

Hi,

How do you pass text from one textbox on a form (forma) to another textbox on another form (formb).

i am not getting an eror but the text just disappear and doesnt appear on the other form.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
     txtAto.Text = formmail.txtto.Text
 End Sub

is ther somethings i am not doing correctly :S

Posted 6-Feb-11 3:30am

SIFNOk

Add a Solution

3 solutions

Solution 1

Your code's doing the reverse of what you say you need to do. Your code assigns the text from the other form's textbox to your current form's textbox (but you are trying to do the opposite if I understand it right).

In general it's not a good idea to access another form's control variables directly. It may be better to expose a public method, something like SetSomeText(string text) in this other form that will internally assign the text to the right textbox.

Posted 6-Feb-11 3:37am

Nish Nishant

Comments

Espen Harlinn 6-Feb-11 9:39am

Nicely spotted as usual :)

Solution 2

Add a public property to form b. Then you can do something like:

VB

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
     formB.PassedText = formmail.txtto.Text
 End Sub

This assumes that the property on Form b is called PassedText and that Form b is created by Form A. If it is not then please describe the structure of your application.

Then in the Setter of your property

VB

txtAto.Text = Value

Hope this helps.

Posted 6-Feb-11 3:38am

Henry Minute

Updated 6-Feb-11 3:40am

v2

Comments

SIFNOk 6-Feb-11 9:45am

Sorry my programming skils are very poor.
i dont reallly understand.

Henry Minute 6-Feb-11 9:53am

In your question you talk about form a and form b, then in your code we learn that one form is called 'formmail' but we don't know if that is form a or form b. So that we can both talk about the same thing, edit your question to use the proper form names.

OriginalGriff's answer has the code for the property I described. See if you can use that.

Espen Harlinn 6-Feb-11 10:40am

Another good answer :)

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2011-02-06T03:41:00

Solution 3

This is more complex that you think.

In order to do this, you must have access to both form instances: not the definitions, but the actual instance of the form that is running, and holds the information you want.

Using your names:

Assuming that your Button "button1" is on "formb", then if "formmail" contains the instance of "forma" then you can do it.

The first thing to check is: are you copying the right way? Is the text you want to copy in the TextBox "txtto" and the place you want to put it "txtAto" on the other form?

Put a breakpoint on the copy instruction, and check.

It is not a good idea to try accessing the content of other form controls: it ties the two forms too tightly together. You can't change one without checking is doesn't affect the other.
Instead, use a property:

VB

Public Property ToAddress() As String
    Get
        Return tbToAddress.Text
    End Get
    Set
        tbToAddress.Text = value
    End Set
End Property

And access that instead.

Posted 6-Feb-11 3:41am

OriginalGriff

Comments

SIFNOk 6-Feb-11 9:59am

Coool Thanks for that Griff! =)I truely apperiate your outlinee! i inderstand better. =D

Why would they make it that difficult to just pass text value from one form to another. Is there a reason?

Henry Minute 6-Feb-11 10:04am

It is one of the principles of Object Oriented Programming (OOP) called Encapsulation.
You will find these in the article at http://en.wikipedia.org/wiki/Object-oriented_programming

OriginalGriff 6-Feb-11 10:32am

As Henry says "encapsulation".

What it boils down to is:
If you rigidly define the interfaces between a class and the outside world, you can change the way the class works internally without affecting any other code.

It's like a car: If you can drive a manual Ford, you can drive a Ferrari. Maybe not very well, but you can engage gear, release the brake and drive to the shops. Imaging what it was like when cars were first developed: every manufacturer had their own set of controls, each in a different place. For example, a Model T Ford had a clutch you had to hold down to make the car move. Changing cars was complex: you had to learn a whole new set of controls.

If you could easily access a TextBox on a different form, then you are stuck with having a TextBox on that form for ever - you can't change it for a drop-down list, or a data-linked Cloud control if someone invents one.

Espen Harlinn 6-Feb-11 10:39am

Good effort, as usual, my 5

farout9999 18-Oct-11 2:54am

got some problem.. got the value pass to when debugging but it wont show on the textbox the value

OriginalGriff 18-Oct-11 3:57am

Sorry? That doesn't make a lot of sense - please try again.