How to pass value from form 1 to form 2

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1.00/5 (2 votes)

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Hi,
I want to update a texbox of form2 from form1.
In form2 i have a textbox which show result form mysql database i need to set value from form1.
What is the method. Please help.
Thank You

Posted 7-Sep-13 1:31am

Arindom_chanda

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[no name] 7-Sep-13 7:33am

There are many ways. It would really help us help you if you told us why the answers to the exact same question others asked and you are asking now did not help you. So we do not end up repeating ourselves with solutions that you have tried already and they did not work for you.

BillWoodruff 8-Sep-13 2:32am

This is one of the most commonly asked types of questions asked, and answered on CP Q&A.

Very important information is missing here: how are the instances of Form1 and Form2 created ?

If Form1 creates the instance of Form2, that is a different "reality" than if Form2, and Form2, are created by some other Form, or if Form2 creates Form1. If an instance of Form2 is created once, and is "always there" during the "life" of the application: that's one scenario, if an instance of Form2 is created "on-demand," and then disposed of when not needed, that's another scenario.

There are several valid/useful/practical ways for Form1 to "get a reference" to Form2's TextBox. The selection of the technique you use should be based on the overall interaction, and relationship, of Form1 with Form2.

There are other techniques which are not mentioned by any of the "solutions" here.

By adding more details to your question, I think you'll get more focused, and helpful, responses.

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OriginalGriff · Answer 1 · 2013-09-07T01:39:00

Solution 1

It depends on the relationship between the forms: which is the parent of the other and so forth.

One of these should cover it:
Transferring information between two forms, Part 1: Parent to Child[^]
Transferring information between two forms, Part 2: Child to Parent[^]
Transferring information between two forms, Part 3: Child to Child[^]

Posted 7-Sep-13 1:39am

OriginalGriff

Comments

Thomas Daniels 7-Sep-13 7:48am

My 5!

ridoy · Answer 2 · 2013-09-07T01:42:00

Solution 2

Let see an example, I assume your value of form 1 is string then, make a constructor for form2 that accept that string value and in calling new form2 pass that value to constructor then set it to form2.frm2Textbox.text like :

C#

Form2 form = new Form2(valueOfForm1);

In form2 constructor:

C#

public class Form2 : Form
{
    public Form2(string text)
    {
        frm2Textbox.Text = text; 
    }
}

You can pass any type of value like above example.Still confused? See it:
Passing Data Between two forms (Windows forms using c#) [^]

Posted 7-Sep-13 1:42am

ridoy

Updated 7-Sep-13 1:46am

v3

Comments

Thomas Daniels 7-Sep-13 7:48am

My 5!

ridoy 7-Sep-13 7:50am

Thank you,:)

BillWoodruff 8-Sep-13 2:39am

In this answer you assume that by "update" the OP means a one-time only, or "static," operation. I would not make that assumption, or any other, until the OP tells us more about what they are doing. Please see my comment to the OP.

ridoy 8-Sep-13 2:45am

Yes Bill i agree with you,as i said in my answer i assume the OP's concept as he didn't clear those things.

ravirami30 · Answer 3 · 2013-09-07T04:15:00

Solution 3

hello!
If you want this in Window forms refer this link

http://stackoverflow.com/questions/11165537/passing-textboxs-text-to-another-form-in-c[^]

Ravi Halvadiya
Software Engineer
Email:ravi@insightsoftech.com

Posted 7-Sep-13 4:15am

ravirami30

Updated 8-Sep-13 20:11pm

v3

Comments

[no name] 7-Sep-13 10:37am

How, exactly, would you recommend that the OP use a query string in a Winforms application?

OriginalGriff 7-Sep-13 17:25pm

Reason for my vote of one: please read the question before trying to answer. Even if this was web based, which this isn't, a query string is probably not a good solution in this case anyway...

aboubkr90 · Answer 4 · 2013-09-07T05:05:00

Solution 4

Try this: How to: Make Thread-Safe Calls to Windows Forms Controls

Posted 7-Sep-13 5:05am

aboubkr90

Trung Nguyen - Viet Nam · Answer 5 · 2013-09-07T07:48:00

Hi,
You can use public variable,
I example, form1 has a text box named 'textbox1', form2 has a text box named 'textbox2', in the form1 has a button named 'button1' used to call form2,

THE WAY TO DO :
1/Create public string variable named 'str' in form2,
2/In pressed event for button1 in the form1 you need to write code :
form2 f=new form2;//create new instant for class form
form2.str=this.textbox1.Text;
f.ShowDialog();
3/In loading event of the form2 you write code as belowing :
textbox2.Text=str,

Hope this will be helpfull for you.
Thank

How to pass value from form 1 to form 2

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