使用asp.net在GDI +中发生了一般错误 [英] A generic error occurred in GDI+ using asp.net

问题描述

我正在尝试从目录中获取所有图像，并逐个在每个图像上放置一个矩形。这是代码

i am trying to get all images from a directory and put a rectangle on each image one by one. here is the code

Brush brush = new SolidBrush(Color.White);
       string[] filesindirectory = Directory.GetFiles(("D:/24-8-2015/32373577989/"));

       foreach (string item in filesindirectory)
       {
           Bitmap bitMapImage = new Bitmap(item);
           Graphics graphicImage1 = Graphics.FromImage(bitMapImage);
           graphicImage1.FillRectangle(brush, 0, 0, 220, 80);
           bitMapImage.Save(item, ImageFormat.Png);
           graphicImage1.Dispose();
           bitMapImage.Dispose();
       }

但是当它保存图像时会出现错误

but when it saves the image it gives error at

bitMapImage.Save(item, ImageFormat.Png);

GDI +发生一般性错误。

请告诉我代码中有什么问题。提前感谢

A generic error occurred in GDI+.
please tell me whats wrong in my code. thanks in advance

推荐答案

当您将文件路径传递给位图构造函数时，文件将保持锁定状态，直到位图实例被处置：

When you pass a file path to the Bitmap constructor, the file remains locked until the Bitmap instance is disposed:

Bitmap构造函数（字符串） [ ^ ]

文件保持锁定，直到处理了位图。

The file remains locked until the Bitmap is disposed.

您正试图在文件仍被锁定时覆盖该文件。



最简单的选项可能是将文件读入内存，将其包装在 MemoryStream 中，然后创建 Bitmap <来自该流的/ code>：



You are trying to overwrite the file while it is still locked.

The simplest option is probably to read the file into memory, wrap it in a MemoryStream, and create the Bitmap from that stream:

foreach (string item in filesindirectory)
{
    byte[] imageBytes = File.ReadAllBytes(item);

    using (Stream stream = new MemoryStream(imageBytes))
    using (Bitmap image = new Bitmap(stream))
    {
        using (Graphics graphics = Graphics.FromImage(image))
        {
            graphics.FillRectangle(brush, 0, 0, 220, 80);
        }

        image.Save(item, ImageFormat.Png);
    }
}

你还想过滤你正在处理的文件只包括图像：

You'll also want to filter the files you're processing to only include images:

string[] filesindirectory = Directory.GetFiles(@"D:\24-8-2015\32373577989\", "*.png");

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