VB.NET：查找文本的大小进行绘制，然后将其吸引到控制(VB.NET: Finding the s

我创建一个用户控件并添加文本大小属性来了。 我需要知道的文字大小是多大将是绘制它的控制之前，这样我可以相对于其高度和宽度居中上的控制。

我假定这是一个Windows API指挥。 不过，我一直没能找到它的任何信息。

 Public Sub DrawImage(ByVal gr As Graphics)
        If Me.Image Is Nothing Then Return
        Dim r As Rectangle = New Rectangle(8, 8, Me.ImageSize.Width, Me.ImageSize.Height)
        Select Case Me.ImageAlign
            Case ContentAlignment.TopLeft
                r = New Rectangle(4, 4, Me.ImageSize.Width, Me.ImageSize.Height)
            Case ContentAlignment.TopCenter
                r = New Rectangle((Me.Width / 2 - Me.ImageSize.Width / 2) / 2, 4, Me.ImageSize.Width, Me.ImageSize.Height)
            Case ContentAlignment.TopRight
                r = New Rectangle(Me.Width - 4 - Me.ImageSize.Width, 4, Me.ImageSize.Width, Me.ImageSize.Height)
            Case ContentAlignment.MiddleLeft
                r = New Rectangle(8, Me.Height / 2 - Me.ImageSize.Height / 2, Me.ImageSize.Width, Me.ImageSize.Height)
            Case ContentAlignment.MiddleCenter
                r = New Rectangle(Me.Width / 2 - Me.ImageSize.Width / 2, Me.Height / 2 - Me.ImageSize.Height / 2, Me.ImageSize.Width, Me.ImageSize.Height)
            Case ContentAlignment.MiddleRight
                r = New Rectangle(Me.Width - 8 - Me.ImageSize.Width, Me.Height / 2 - Me.ImageSize.Height / 2, Me.ImageSize.Width, Me.ImageSize.Height)
            Case ContentAlignment.BottomLeft
                r = New Rectangle(8, Me.Height - 8 - Me.ImageSize.Height, Me.ImageSize.Width, Me.ImageSize.Height)
            Case ContentAlignment.BottomCenter
                r = New Rectangle(Me.Width / 2 - Me.ImageSize.Width / 2, Me.Height - 8 - Me.ImageSize.Height, Me.ImageSize.Width, Me.ImageSize.Height)
            Case ContentAlignment.BottomRight
                r = New Rectangle(Me.Width - 8 - Me.ImageSize.Width, Me.Height - 8 - Me.ImageSize.Height, Me.ImageSize.Width, Me.ImageSize.Height)
        End Select
        gr.DrawString("Header", New Font("MS SANS SERIF", 8.25, FontStyle.Regular, GraphicsUnit.Point, 1, True), Brushes.Black, 0, 0)

        'gr.DrawImage(Me.Image, r)
    End Sub

正如你所看到@ gr.DrawString，我需要知道文字有多大预测是让我能规模的控制和中心控制中的文本。

Answer 1:

尝试MeasureString （）

gr.MeasureString("Header", New Font("MS SANS SERIF", 8.25, FontStyle.Regular, GraphicsUnit.Point, 1, True)).Width

文章来源: VB.NET: Finding the size of text to be drawn, before it is drawn to a control