求助 PNG图像格式转换成JPG格式 - 专家坐堂 - Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

老师:您好!请问把PNG的图像格式转换成JPG格式,代码怎样写,请老师指教!!!谢谢!

[此贴子已经被作者于2022/7/3 16:56:22编辑过]

Dim file As String = "d:\test.PNG"

Dim img As image = getImage(file)

Dim bmp = new bitmap(img, 100, 100)

bmp.save("d:\test.jpg",img.RawFormat)

bmp.Dispose

谢谢老师! 谢谢!

我保存之后, ET服装打板有个小窗口,打开图像,jpg格式,提示没效图像,要WIN系统的画图软件打开后另存为 JPEG格式的JPG扩展名才可以打开,不知是什么问题.

谢谢老师!!!谢谢指教!!!

Dim file As String = "D:\问题\1.PNG"

Dim img As Image = getimage(file)

Dim bmpOut As New Bitmap(img.Width, img.Height)

Dim myGraphics As Graphics = Graphics.FromImage(bmpOut)

myGraphics.Clear(Color.White)

Dim rectSrc As New System.Drawing.Rectangle(0, 0, img.Width, img.Height)

myGraphics.DrawImage(img, rectSrc, rectSrc, GraphicsUnit.Pixel)

myGraphics.Dispose()

bmpOut.Save("D:\问题\1.jpg", System.Drawing.Imaging.ImageFormat.Jpeg)

bmpOut.Dispose

[此贴子已经被作者于2022/7/4 21:52:38编辑过]

谢谢老师!

谢谢!!!

老师:您好!

写着代码在 button 控件,

点击后提示如下:

重载决策失败，因为没有 Public“DrawImage”可以用这些参数调用:

'Public Sub DrawImage(image As System.Drawing.Image, destRect As System.Drawing.Rectangle, srcRect As System.Drawing.Rectangle, srcUnit As System.Drawing.GraphicsUnit)':

与参数“destRect”匹配的参数无法从“Integer”转换为“Rectangle”。

与参数“srcRect”匹配的参数无法从“Integer”转换为“Rectangle”。

'Public Sub DrawImage(image As System.Drawing.Image, destPoints As System.Drawing.Point(), srcRect As System.Drawing.Rectangle, srcUnit As System.Drawing.GraphicsUnit)':

与参数“destPoints”匹配的参数无法从“Integer”转换为“Point()”。

与参数“srcRect”匹配的参数无法从“Integer”转换为“Rectangle”。

'Public Sub DrawImage(image As System.Drawing.Image, destRect As System.Drawing.RectangleF, srcRect As System.Drawing.RectangleF, srcUnit As System.Drawing.GraphicsUnit)':

与参数“destRect”匹配的参数无法从“Integer”转换为“RectangleF”。

与参数“srcRect”匹配的参数无法从“Integer”转换为“RectangleF”。

'Public Sub DrawImage(image As System.Drawing.Image, destPoints As System.Drawing.PointF(), srcRect As System.Drawing.RectangleF, srcUnit As System.Drawing.GraphicsUnit)':

与参数“destPoints”匹配的参数无法从“Integer”转换为“PointF()”。

与参数“srcRect”匹配的参数无法从“Integer”转换为“RectangleF”。

请老师指教!!! 谢谢!!!

Dim file As String = "D:\问题\1.PNG"

Dim img As Image = getimage(file)

Dim bmpOut As New Bitmap(img.Width, img.Height)

Dim myGraphics As Graphics = Graphics.FromImage(bmpOut)

myGraphics.Clear(Color.White)

Dim rectSrc As New System.Drawing.Rectangle(0, 0, img.Width, img.Height)

myGraphics.DrawImage(img, rectSrc, rectSrc, GraphicsUnit.Pixel)

myGraphics.Dispose()

bmpOut.Save("D:\问题\1.jpg", System.Drawing.Imaging.ImageFormat.Jpeg)

bmpOut.Dispose

谢谢老师!!!

问题搞掂了.

谢谢!!!

谢谢老师!!!

谢谢!!!

主题：求助 PNG图像格式转换成JPG格式