How to update the form field values get from other form

Question

0.00/5 (No votes)

See more:

i have window form1 and when i click getData it open new window form2, inside form2 i have datagridview, when i click the cell i want to fill the textbox of the form1 textbox fields.

What I have tried:

C++

Note : i make checkInfrm fields public in visual studio property 

// checkInfrm 

    public partial class checkInfrm : Form
    {
        public checkInfrm()
        {
            InitializeComponent();
        }

        private void btnListGuest_Click(object sender, EventArgs e)
        {
            Forms.listGuestFrm listGuest = new Forms.listGuestFrm();
            listGuest.ShowDialog();
        }
...
   }



```


// listGuestFrm 
public partial class listGuestFrm : Form
    {
        public listGuestFrm()
        {
            InitializeComponent();
        }

       private void dgvGuestList_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            try
            {
               
                if (e.RowIndex != -1)
                {
                   
                    DataGridViewRow row = dgvGuestList.Rows[e.RowIndex];
                    frmGuest guest = new frmGuest();
                    checkInfrm checkIn = new checkInfrm();
                    Int32 guestId = Convert.ToInt32(row.Cells["id"].Value);


                        this.Close();
                        checkIn.txtId.Text = row.Cells["id"].Value.ToString();
                        checkIn.txtGuestId.Text = "G" +row.Cells["id"].Value.ToString();
                        checkIn.txtGuestName.Text = 
                        row.Cells["guestName"].Value.ToString();
                        checkIn.txtGender.Text = row.Cells["gender"].Value.ToString();
                        checkIn.txtContactNo.Text = row.Cells["countactNo"].Value.ToString();
                        checkIn.txtOccupation.Text = 
                         row.Cells["occupication"].Value.ToString();
                        checkIn.txtIdType.Text = row.Cells["idType"].Value.ToString();
                        checkIn.txtIdNo.Text = row.Cells["idNo"].Value.ToString();
                        Retrieve.loadText("sp_fillGuestBalance", 
                         checkIn.txtBalanceValue, guestId);
                       
                        checkIn.Show(); // it is working, but it open me new window
                        //checkIn.Items.Add(checkIn);
                        //checkIn.fillValues();

                    }
      }
}

Posted 16-Jan-21 4:10am

Member 14921707

Updated 17-Jan-21 3:45am

v7

Add a Solution

3 solutions

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)

RickZeeland · Answer 1 · 2021-01-16T04:39:00

Solution 1

This can be solved in several ways, a simple approach is using static variables, see:
How to Pass Data One Form to Another in Windows Form Application[^]

Some other options are discussed here: Passing Data Between Forms[^]

Or you could do it like this:

public partial class FormMain : Form
{
	FormSub form2;

	public FormMain()
	{
		InitializeComponent();
	}

	private void button1_Click(object sender, EventArgs e)
	{
		form2 = new FormSub();
		form2.TextBoxValue = "First Value";
		form2.Show();
	}

	private void button2_Click(object sender, EventArgs e)
	{
		form2.TextBoxValue = "Changed Value";
	}
}

public partial class FormSub : Form
{
    public FormSub()
    {
        InitializeComponent();
    }

    public string TextBoxValue
    {
        get { return textBox1.Text; }
        set { textBox1.Text = value; }
    }
}

Posted 16-Jan-21 4:39am

RickZeeland

Updated 16-Jan-21 6:09am

v3

Comments

Member 14921707 16-Jan-21 10:43am

all the above article i already read them,, pass data for new opening window.
my question how can i pass data if there is already open window, instead of opening again

RickZeeland 16-Jan-21 10:48am

Take a look at the last example "The Delegates Approach".

Member 14921707 17-Jan-21 3:12am

i am asking simple question. i have already open window (checkIn widow)..i want to fill my guest information in to it, when i click list of guest it open window with grid view, when i click the cell i want to fill the first window guest information. how can i do this?? ``` checkInfrm.Show()``` open me new window i dont want this
``` update my code please!!```

RickZeeland 17-Jan-21 3:27am

Take a look at button2_Click() in the last example, it does not open a new form.
And remember: I do not have your complete code with all the forms and datagridview!

Member 14921707 17-Jan-21 3:48am

see my update code..i add full code

RickZeeland · Answer 2 · 2021-01-16T23:25:00

Here is another example that shows how you can use a Static form to pass the value from the sub form to the main form (a better way to do these kind of things would be by using events btw)

static class Program
{
    public static FormMain formMain;

    static void Main()
    {
        formMain = new FormMain();
        Application.Run(formMain);
    }
}

public partial class FormMain : Form
{
    FormSub form2;

    public FormMain()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        form2 = new FormSub();
        form2.Show();
    }

    /// <summary>
    /// Used to set the main textbox text from the sub form
    /// </summary>
    public void SetMainTextBoxValue(string text)
    {
        this.textBox1.Text = text;
    }
}

public partial class FormSub : Form
{
    public FormSub()
    {
        InitializeComponent();
    }

    /// <summary>
    /// Set the main textbox text
    /// </summary>
    private void button1_Click(object sender, System.EventArgs e)
    {
        Program.formMain.SetMainTextBoxValue(this.textBox1.Text);
    }
}

Maciej Los · Answer 3 · 2021-01-17T03:45:00

Solution 3

Here is a generic idea:
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[^]
and
Passing Data between Windows Forms[^]

Posted 17-Jan-21 3:45am

Maciej Los