禁用按钮时，使其颜色保持不变 [英] Keep button color unchanged when it is disabled

问题描述

我想使按钮颜色在禁用时不变为灰色.我正在使用图像作为背景色，并且已将 ForeColor 设置为白色.禁用按钮后，我想保持原样，不要将其更改为灰色.我的代码是:

I want to keep the button color from changing to grey when I disable it. I'm using an image for the background color and I've set the ForeColor to white. When the button is disabled I want to keep it as it is, not having it changed to grey. My code is:

Private Sub btnItemNonTaxable_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnItemNonTaxable.Click
    If Shift = 0 Then
        MessageBox2("Please Begin the Shift before you start the transaction.", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
        Exit Sub
    End If
    txtNonInventoryQuantity.Text = "1"
    pnlOpenItem.Visible = True
    LabelNonInventory.Text = "Non-Inventory Non-Taxable"
    isOpenItem = True
    chkTax1.Visible = False
    chkTax1.Checked = False
    txtPrice.Focus()
    btnCashDrop.Enabled = False
    If Not btnCashDrop.Enabled Then
        btnCashDrop.Image = My.Resources.small_green
btnCash.ForeColor = Color.White
    End If

推荐答案

实际上，我们必须手动使用 button 的 text redraw 在其 enable 模式期间，所需的 color 会更改.尝试下面的代码来满足您的需求.

Actually we have to manually redraw the text of the button with the needed color, during its enable mode gets changed. Try this following code to achieve your need.

[注意:代码已通过 IDE ]

Private Sub Button1_EnabledChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.EnabledChanged
        Button1.ForeColor = If(sender.enabled = False, Color.Blue, Color.Red)
End Sub

Private Sub Button1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Button1.Paint

    Dim btn = DirectCast(sender, Button)
    Dim drawBrush = New SolidBrush(btn.ForeColor)
    Dim sf = New StringFormat With {.Alignment = StringAlignment.Center, .LineAlignment = StringAlignment.Center}
    Button1.Text = String.Empty
    e.Graphics.DrawString("Button1", btn.Font, drawBrush, e.ClipRectangle, sf)
    drawBrush.Dispose()
    sf.Dispose()

End Sub

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