Make form like the message box just with own commands

Question

First of all, I would like to say that english is not my mother language. I have this Form in windows forms:

Form

with this code:

public partial class FormInput : Form
{
    public FormInput(string Content)
    {
        InitializeComponent();

        this.Text = Content;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        //confirm
    }

    private void button2_Click(object sender, EventArgs e)
    {
        //cancel
    }
}

Now, I try to implement it in a WPF window. I want to use it like that:

string foo;

if (FormInput.Show("abc") == true)
{
    foo = [Form output as a string];
}

So, I need one input value as a string and two output value as a bool and string. The user have to enter something in the TextBox (textBox1) end click confirm or press enter and the window close. Alternativly, the user can press escape or click cancel. How can I do that?

That's not a MessageBox. It seems you want to replicate VB6's InputBox. Forms just don't work like this in .NET, going back all the way to 2002. VB 6's static form instance was a "convenience" trick that cause a lot of trouble when people realized the single form kept the old data. — Panagiotis Kanavos
– Panagiotis Kanavos, Commented May 1, 2024 at 13:47
So what is your question? Where are you encountering problems? — Olivier Jacot-Descombes
– Olivier Jacot-Descombes, Commented May 1, 2024 at 13:51
okay, but I need any way to make a function with the features I need. — Laurin Theisen
– Laurin Theisen, Commented May 1, 2024 at 13:52
I need a function that open a window with a cancel button, a confirm button and a textBox. The text in the textBox and the output value from the window (cancel/confirm) should given back. I already tried a return, but that did ot work with more than one value and across the window. — Laurin Theisen
– Laurin Theisen, Commented May 1, 2024 at 13:57
You have to create that form just like any other form. That's shown in all Windows Forms tutorials. You create an instance of the form with new, set its properties and call Show() if you want it to be modeless, ShowDialog() if you want it to be modal. If the user clicks OK, you read the properties with the new data. Don't make the textbox a public property to read or set its Text property though — Panagiotis Kanavos
– Panagiotis Kanavos, Commented May 1, 2024 at 13:59

Laurin Theisen · Accepted Answer · 2024-05-01 14:38:03Z

0

Okay, I have the answer; Main window:

string output;

FormInput input = new FormInput("abc");
input.ShowDialog();
if (input.ReturnValueConfirm == true)
    output = input.ReturnValueText;

Second window:

public string ReturnValueText { get; set; }
public bool ReturnValueConfirm { get; set; }

public FormInput(string Content)
{
    InitializeComponent();

    this.Text = Content;
}

private void button1_Click(object sender, EventArgs e) //confirm
{
    ReturnValueText = textBox1.Text;
    ReturnValueConfirm = true;
    this.Close();
}

private void button2_Click(object sender, EventArgs e) //cancel
{
    ReturnValueText = textBox1.Text;
    ReturnValueConfirm = false;
    this.Close();
}

Thanks to the comments...

answered May 1, 2024 at 14:38

Laurin Theisen

92 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

LarsTech Over a year ago

Instead of ReturnValueConfirm and this.Close(), you should set the form's DialogResult instead. Then it would be if (input.ShowDialog() == DialogResult.Ok) ...

Laurin Theisen Over a year ago

I tried that, but that didn´t work. Form1 is in wpf, form2 in win forms.

LarsTech Over a year ago

Your post didn't mention anything about WPF.

Laurin Theisen Over a year ago

You are right, I thought, I have said it... Thank you!

Laurin Theisen Over a year ago

I've changed the question.

Olivier Jacot-Descombes · Accepted Answer · 2024-05-02 10:20:19Z

You can create a static method that will create and open a form. Let it return a Boolean telling whether the user clicked OK or not, you can the return the string value through an out parameter.

Set the button's DialogResult property as following (I called the buttons btnOK and btnCancel):

// You can do this in the properties window.
btnOK.DialogResult = DialogResult.OK;
btnCancel.DialogResult = DialogResult.Cancel;

And in the form (this will close the form automatically):

// You can do this in the properties window.
AcceptButton = btnOk;
CancelButton = btnCancel;

With the TextBox being called txtValue, you get:

using System;
using System.Windows.Forms;

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

    public static bool TryGetInput(string title, out string value, string defaultValue = null)
    {
        var dlg = new InputBox();
        dlg.Text = title;
        dlg.txtValue.Text = defaultValue;

        if (dlg.ShowDialog() == DialogResult.OK) {
            value = dlg.txtValue.Text;
            return true;
        } else {
            value = null;
            return false;
        }
    }
}

This is really all the code. There is no need for button Click event handlers.

Now, you can call the input box like this:

if (InputBox.TryGetInput("Input required", out string value)) {
    //TODO: use 'value' here.
}

Collectives™ on Stack Overflow

Make form like the message box just with own commands

2 Answers 2

5 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

5 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related