How to save delegate list values in other form

Question

1.00/5 (1 vote)

See more:

I have a main form which has buttons n when i click on button one form 1 and similar to it form 2 when 2 button is clicked
So I was able to pass value from form 1 to form 2 but when form 1 is closed values come back to 0

What I have tried:

Public delegate void abc(list<string > p1)

Form 2 f =new form 2();
Abc del =new Abc(f. Fpass) ;
Del(lst) ;

In Form 2

Public void Fpass( list<string > p2) {pvalue. Add(p2. ToArray() ) ;
}

Posted 21-Feb-17 20:49pm

Member 12972565

Updated 21-Feb-17 21:55pm

Add a Solution

Comments

Graeme_Grant 22-Feb-17 3:05am

What are you trying to do?

Member 12972565 22-Feb-17 3:28am

Trying to pass the list values from form 1 to form 2, since I have many forms- constructor approach won't work. so m trying to use delegate.

Graeme_Grant 22-Feb-17 3:34am

why not? a quick google search show that as a popular solution.

Member 12972565 22-Feb-17 3:48am

I tried it... Unfortunately I couldn't find any so i posted here

Graeme_Grant 22-Feb-17 3:51am

Seriously??? Google Search: winform passing variables between forms[^]

BillWoodruff 22-Feb-17 5:02am

You need to post code that doesn't have the errors I see here which indicate you did not type it in using Visual Studio where the syntax errors would be highlighted as you typed.

Post actual code with error messages.

It is not clear how many Forms there are, and which one is the app's Main Form.

1 solution

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)

Graeme_Grant · Answer 1 · 2017-02-21T21:55:00

Above is a Google Search link on how to pass variables in the Form's constructor...

Alternatively, if this approach is not suitable, ie: values need to be passed after initialization, then the following example will do the trick:

Second Form (receiver):

C#

using System.Windows.Forms;

namespace WFPassVariablesBetweenForms
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        public void SetValue(string text)
        {
            textBox1.Text = text;
        }
    }
}

Main Form (Sender):

C#

using System;
using System.Data;
using System.Linq;
using System.Windows.Forms;

namespace WFPassVariablesBetweenForms
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            var xxx = new Form2();
            xxx.Show();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var xxx = Application.OpenForms.Cast<Form>().Where(x => x.Name == "Form2").FirstOrDefault();
            ((Form2)xxx).SetValue(textBox1.Text);
        }
    }
}

The danger with this solution isthat it is tightly bound. Can be refactored for loose dependency but that is not the purpose of this example.