C＃：如何更改图像方向属性？ [英] C#: How to change an image orientation property?

问题描述

foreach (var prop in img.PropertyItems)
{
      if (prop.Id == 0x0112) //value of EXIF
      {
         var orientation = img.GetPropertyItem(prop.Id).Value[0];
         switch (orientation)
         {
            case 1:
            // No rotation required.
            break;
            case 2:
            img.RotateFlip(RotateFlipType.RotateNoneFlipX);
            break;
            case 3:
            img.RotateFlip(RotateFlipType.Rotate180FlipNone);

我使用上面的代码来检测图像是否从原始状态改变。假设我将方向值设置为3并且我想将其设置为1的正常，那么我如何将该方向属性值3替换为1？

I have used above code to detect whether image orietation is changed from original. Suppose I have get orientation value as "3" and I want to set it to normal that is "1", so how I could replace that orientation property value 3 by 1?

推荐答案

尝试使用 Image.SetPropertyItem Method [ ^ ]像这样：

Try it with Image.SetPropertyItem Method [^] like this:

foreach (var prop in img.PropertyItems)
{
      if (prop.Id == 0x0112) //value of EXIF
      {
         var orientation = prop.Value;
         if (orientation == 3)
         {
             prop.Value[0] = 1;
             img.SetPropertyItem(prop);
         }
     }
}

这篇关于C＃：如何更改图像方向属性？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！