如何更改图像缩略图 [英] How to change Image Thumbnail

问题描述

大家好
事实上，我正在通过c#.net编写图像处理应用.
在这里，我根据其他图像制作一个图像.
这意味着我有一个图像，并且对其进行了一些更改然后再次保存"，但是问题是图像的缩略图没有更改".像这样非常简单的代码:

hi all
as a matter of fact I''m writing an image processing app by c#.net.
here I make an image based on the other image .
it means that "I have an image and I make some changes on it and save it again" but the problem is "the thumbnail of image doesn''t change" . very simple code like this :

string strPath="c:\\bb.jpg",strMainPicPath="c:\\aa.jpg" ;
Image imgBase;
imgBase = Image.FromFile(strMainPicPath);

SolidBrush brush = new SolidBrush(cWhite);
Font fntB = new Font("tahoma", 8, FontStyle.Bold);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(imgBase);
g.DrawString("Test String", fntB, brush, 100, 100);
g.Dispose();

imgBase.Save(strPath, System.Drawing.Imaging.ImageFormat.Jpeg);
imgBase.Dispose();

问题只是图像的缩略图.

problem is just thumbnail of image .

推荐答案

这是非常糟糕的代码.始终使用using构造来强制处理对象.正如其他人所说，如果更改图像，还需要生成一个新的缩略图，这看起来很明显.

This is pretty bad code. Always use the using construct to force things to be disposed. As others have said, if you change your image, you also need to generate a new thumbnail, that seems obvious.

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