在VB.NET中调整图像大小 [英] Resizing Images in VB.NET

问题描述

我想创建一个简单的VB实用程序来使用vb.net调整图像大小。我无法弄清楚用什么vb类来实际操作图像。 Image类和Bitmap类不起作用。

I'd like to make a simple VB utility to resize images using vb.net. I am having trouble figuring out what vb class to use to actually manipulate the images. The Image class and the Bitmap class don't work.

非常感谢任何想法，提示，技巧，教程链接。

Any ideas, hints, tips, tutorial links are greatly appreciated.

谢谢。

推荐答案

这是一篇文章，详细介绍了如何执行此操作。

Here is an article with full details on how to do this.

Private Sub btnScale_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles btnScale.Click
    ' Get the scale factor.
    Dim scale_factor As Single = Single.Parse(txtScale.Text)

    ' Get the source bitmap.
    Dim bm_source As New Bitmap(picSource.Image)

    ' Make a bitmap for the result.
    Dim bm_dest As New Bitmap( _
        CInt(bm_source.Width * scale_factor), _
        CInt(bm_source.Height * scale_factor))

    ' Make a Graphics object for the result Bitmap.
    Dim gr_dest As Graphics = Graphics.FromImage(bm_dest)

    ' Copy the source image into the destination bitmap.
    gr_dest.DrawImage(bm_source, 0, 0, _
        bm_dest.Width + 1, _
        bm_dest.Height + 1)

    ' Display the result.
    picDest.Image = bm_dest
End Sub

在相似的行上还有一个。

这篇关于在VB.NET中调整图像大小的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！