Popup keypad for General TextBox Use

[Archie]

This is a very simple method to allow a user to enter a value in a TextBox without a physical keyboard. I used the double click event in order to allow the option of single click for physical keyboard and double click for virtual keyboard.

- In Solution Explorer, double click MainForm.vb to open in design view
- In the Toolbox, under All Windows Forms group, add a TextBox to the form
- With the TextBox selected, go to the Properties Window and at the top click the lightening bolt to see the event list
- Find the DoubleClick and double click in the are to the right of it. This will take you back to the code
- Insert the code shown here:

Code: [Select]

    Private Sub TextBox1_DoubleClick(sender As Object, e As EventArgs) Handles TextBox1.DoubleClick
        Dim kpd As New MfgControl.AdvancedHMI.Controls.AlphaKeyboard
        If kpd.ShowDialog = DialogResult.OK Then
            TextBox1.Text = kpd.Value
        End If
    End Sub

- Run the application and double click on the Textbox

[mpshannon23]

Do you have example code of this in C#.  When I am trying to code this in C# I get an error in the If statement for kpd.ShowDialog = DialogResult.OK

[Archie]

Do you have example code of this in C#.  When I am trying to code this in C# I get an error in the If statement for kpd.ShowDialog = DialogResult.OK

Code: [Select]

private void TextBox1_DoubleClick(object sender, EventArgs e)
{
MfgControl.AdvancedHMI.Controls.AlphaKeyboard kpd = new MfgControl.AdvancedHMI.Controls.AlphaKeyboard();
if (kpd.ShowDialog == DialogResult.OK) {
TextBox1.Text = kpd.Value;
}
}


[mpshannon23]

One change had to be made.  kpd.ShowDialog should be kpd.ShowDialog().  See code below.

Code: [Select]

private void TextBox1_DoubleClick(object sender, EventArgs e)
{
MfgControl.AdvancedHMI.Controls.AlphaKeyboard kpd = new MfgControl.AdvancedHMI.Controls.AlphaKeyboard();
if (kpd.ShowDialog() == DialogResult.OK) {
TextBox1.Text = kpd.Value;
}
}

[Phrog30]

What have you done about restricting characters?  For example, if I only want them to enter numbers?  I currently have this code written, but for the textbox, is there a good way of limiting the keyboard before they send to the object?

James

[Archie]

What have you done about restricting characters?  For example, if I only want them to enter numbers?

You could use the MfgControl.AdvancedHMI.Controls.Keypad if it is only numeric input

[Phrog30]

What have you done about restricting characters?  For example, if I only want them to enter numbers?

You could use the MfgControl.AdvancedHMI.Controls.Keypad if it is only numeric input

Thanks for the input Archie.  The more I thought about it, the code needs to be part of the "object", since if the application is being run on a desktop they won't be using the popup keyboard or calculator.

James