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.Net Windows Forms Button Size question

How, given input text and font, do I calculate a button's size? For Labels and Textboxes I use the TextRenderer.Measurestring to get the text size, then set the control's ClientSize property. The control's Size property is automatically set a little larger by the system and everything works fine. However, buttons dont do this and the text gets cut off when the button is displayed.

Currently I am fudging, adding an amount to the text height and width that I found by trial and error. It doesnt work perfectly but is OK. Is there a correct way to do this calculation.

I am using framework 4, Windows 64 bit.
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2 Solutions
You can use the MeasureString method

Here is the code sample from MSDN:
Private Sub MeasureStringMin(ByVal e As PaintEventArgs)

    ' Set up string.
    Dim measureString As String = "Measure String"
    Dim stringFont As New Font("Arial", 16)

    ' Measure string.
    Dim stringSize As New SizeF
    stringSize = e.Graphics.MeasureString(measureString, stringFont)

    ' Draw rectangle representing size of string.
    e.Graphics.DrawRectangle(New Pen(Color.Red, 1), 0.0F, 0.0F, _
    stringSize.Width, stringSize.Height)

    ' Draw string to screen.
    e.Graphics.DrawString(measureString, stringFont, Brushes.Black, _
    New PointF(0, 0))
End Sub

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MikeBroderickAuthor Commented:
Tried it, doesnt work. Graphics.MeasureString doesnt calculate the string size correcly for display devices. I use the TextRenderer.MeasureText method instead. it works correctly.

The problem I am having is the fact that when you set a button's client size, the sze is not adjusted for any nonclient stuff the way labels and textboxes do.
Windows Controls uses GDI, then you need eval using Gdi functions.

.Net uses GDI+ and DrawString has some diferences with Gdi TextOut, also on Font Size

The easy solution is create the button an Layout it:

Private btn As New Button With {.AutoSize = True, .visible = False}

    Public Sub EvalSizeButton(ByVal Font As Font, ByVal Txt As String)
        btn.Font = Font
        btn.Text = "Esto es una Prueba"
        btn.Size = New Size(0, 0)
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
       EvalSizeButton(New Font("Arial", 16), "Prueba")
       EvalSizeButton(New Font("Arial", 10), "Prueba 2")
    End Sub

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Sorry, replace Line:
MikeBroderickAuthor Commented:
Thank you, but this didnt work either. The AutoSize = True line makes the button display correcly. I do not see the need for any of the suspend, resume, or size lines. Please let me know if I am missing something.

The problem with using AutoSize is I need the button's overall size so I can place other objects on the form near each other and have correct spacing. With AutoSize = True, I now dont know the actual button size.

This seemed to work. It turns AutoSize on and then off, recording then setting the  height/width:

Private Shared Sub BldButton(ByRef inButton As Button, ByVal inParent As Object, _
                       ByVal inText As String, ByVal inFont As Font, _
                       ByVal inLoc As Point)
        Dim ww, hh As Int32

        inButton = New Windows.Forms.Button
        inButton.AutoSize = True
        inButton.Parent = inParent

        inButton.Font = inFont
        inButton.Text = inText
        inButton.Location = inLoc

        ww = inButton.Width
        hh = inButton.Height
        inButton.AutoSize = False
        inButton.Height = hh
        inButton.Width = ww

    End Sub

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Note I do´nt suggest you to set your button autosize.

In suggest use a invisible button to eval size, then set the size to your control or draw the control with this size.

I test the evalsize method and works fine.
I SuspendLayout / resumeLayout on an auxiliar control used only to eval size.

I think you are adding / resizing controls.
MikeBroderickAuthor Commented:
Sorry I didnt understand. The DebugPrint prints the correct button size, which is what I want. Thank you.
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