在GDI +中Bitmap.Save方法发生一般性错误 [英] A Generic error occured in GDI+ in Bitmap.Save method

问题描述

我工作的上传和缩略图forder该图像的同一个略图副本。

我使用以下链接：

<一个href=\"http://weblogs.asp.net/markmcdonnell/archive/2008/03/09/resize-image-before-uploading-to-server.aspx\">http://weblogs.asp.net/markmcdonnell/archive/2008/03/09/resize-image-before-uploading-to-server.aspx

但

  newBMP.Save（目录+tn_+文件名）;
 

是造成异常GDI +中发生一般性错误。

我试图给在文件夹的权限，还试图保存文档时，使用一个新的独立的BMP对象。

编辑：

 保护无效ResizeAndSave（PropBannerImage objPropBannerImage）
    {
        //创建在存储器FileUpload控件的内容的位图
        位图originalBMP =新位图（fuImage.FileContent）;        //计算新的图像尺寸
        INT origWidth = originalBMP.Width;
        INT origHeight = originalBMP.Height;
        INT sngRatio = origWidth / origHeight;
        INT thumbWidth = 100;
        INT thumbHeight = thumbWidth / sngRatio;        INT bannerWidth = 100;
        INT bannerHeight = bannerWidth / sngRatio;        //创建一个新位图，其中将举办previous调整位图
        位图thumbBMP =新位图（originalBMP，thumbWidth，thumbHeight）;
        位图bannerBMP =新位图（originalBMP，bannerWidth，bannerHeight）;        //创建一个基于新的位图图形
        图形oGraphics = Graphics.FromImage（thumbBMP）;
        //设置新的图形文件的属性
        oGraphics.Smoothi​​ngMode = Smoothi​​ngMode.AntiAlias​​; oGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic;        //绘制基础上，调整位图新的图形
        oGraphics.DrawImage（originalBMP，0，0，thumbWidth，thumbHeight）;        位图newBitmap =新位图（thumbBMP）;
        thumbBMP.Dispose（）;
        thumbBMP = NULL;        //新的图形文件保存到服务器
        newBitmap.Save（〜/图片/大拇指/+T+ objPropBannerImage.ImageId，ImageFormat.Jpeg）;        oGraphics = Graphics.FromImage（bannerBMP）;
        //设置新的图形文件的属性
        oGraphics.Smoothi​​ngMode = Smoothi​​ngMode.AntiAlias​​; oGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic;        //绘制基础上，调整位图新的图形
        oGraphics.DrawImage（originalBMP，0，0，bannerWidth，bannerHeight）;
        //新的图形文件保存到服务器
        bannerBMP.Save（〜/图片/+ objPropBannerImage.ImageId +.JPG）;
        //一旦与位图对象完毕后，我们释放他们。
        originalBMP.Dispose（）;        bannerBMP.Dispose（）;
        oGraphics.Dispose（）;
    }
 

解决方案

  

在任何一个位图对象或Image对象从构造
  文件，该文件仍然锁定为对象的生命周期。作为一个
  因此，你不能改变的图像，并将其保存回到同一文件
  它起源。
   http://support.microsoft.com/?id=814675

<一个href=\"http://stackoverflow.com/questions/1053052/a-generic-error-occurred-in-gdi-jpeg-image-to-memorystream/1053123#1053123\">A在GDI + JPEG图像到的MemoryStream

发生一般性错误

<一个href=\"http://stackoverflow.com/questions/336387/image-save-throws-a-gdi-exception-because-the-memory-stream-is-closed/336396#336396\">Image.Save(..)因为内存流关闭抛出GDI +的异常

<一个href=\"http://alperguc.blogspot.in/2008/11/c-generic-error-occurred-in-gdi.html\">http://alperguc.blogspot.in/2008/11/c-generic-error-occurred-in-gdi.html

编辑：结果
从内存中只是写...

  

保存到一个'中间人'内存流，应该工作

例如。试试这个 - 替换

 位图newBitmap =新位图（thumbBMP）;
    thumbBMP.Dispose（）;
    thumbBMP = NULL;
    newBitmap.Save（〜/图片/大拇指/+T+ objPropBannerImage.ImageId，ImageFormat.Jpeg）;
 

喜欢的东西：

 字符串outputFileName =...;
使用（MemoryStream的内存=新的MemoryStream（））
{
    使用（的FileStream FS =新的FileStream（outputFileName，FileMode.Create，FileAccess.ReadWrite））
    {
        thumbBMP.Save（存储器，ImageFormat.Jpeg）;
        字节[]字节= memory.ToArray（）;
        fs.Write（字节，0，bytes.Length）;
    }
}
 

I am working on to upload and same a thumnail copy of that image in a thumbnail forder.

I am using following link:

http://weblogs.asp.net/markmcdonnell/archive/2008/03/09/resize-image-before-uploading-to-server.aspx

but

newBMP.Save(directory + "tn_" + filename);   

is causing exception "A generic error occurred in GDI+."

I have tried to give permission on folder, also tried to use a new separate bmp object when saving.

Edit:

    protected void ResizeAndSave(PropBannerImage objPropBannerImage)
    {
        // Create a bitmap of the content of the fileUpload control in memory
        Bitmap originalBMP = new Bitmap(fuImage.FileContent);

        // Calculate the new image dimensions
        int origWidth = originalBMP.Width;
        int origHeight = originalBMP.Height;
        int sngRatio = origWidth / origHeight;
        int thumbWidth = 100;
        int thumbHeight = thumbWidth / sngRatio;

        int bannerWidth = 100;
        int bannerHeight = bannerWidth / sngRatio;

        // Create a new bitmap which will hold the previous resized bitmap
        Bitmap thumbBMP = new Bitmap(originalBMP, thumbWidth, thumbHeight);
        Bitmap bannerBMP = new Bitmap(originalBMP, bannerWidth, bannerHeight);

        // Create a graphic based on the new bitmap
        Graphics oGraphics = Graphics.FromImage(thumbBMP);
        // Set the properties for the new graphic file
        oGraphics.SmoothingMode = SmoothingMode.AntiAlias; oGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic;

        // Draw the new graphic based on the resized bitmap
        oGraphics.DrawImage(originalBMP, 0, 0, thumbWidth, thumbHeight);

        Bitmap newBitmap = new Bitmap(thumbBMP);
        thumbBMP.Dispose();
        thumbBMP = null;

        // Save the new graphic file to the server
        newBitmap.Save("~/image/thumbs/" + "t" + objPropBannerImage.ImageId, ImageFormat.Jpeg);

        oGraphics = Graphics.FromImage(bannerBMP);
        // Set the properties for the new graphic file
        oGraphics.SmoothingMode = SmoothingMode.AntiAlias; oGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic;

        // Draw the new graphic based on the resized bitmap
        oGraphics.DrawImage(originalBMP, 0, 0, bannerWidth, bannerHeight);
        // Save the new graphic file to the server
        bannerBMP.Save("~/image/" + objPropBannerImage.ImageId + ".jpg");


        // Once finished with the bitmap objects, we deallocate them.
        originalBMP.Dispose();

        bannerBMP.Dispose();
        oGraphics.Dispose();
    }

解决方案

When either a Bitmap object or an Image object is constructed from a file, the file remains locked for the lifetime of the object. As a result, you cannot change an image and save it back to the same file where it originated. http://support.microsoft.com/?id=814675

A generic error occurred in GDI+, JPEG Image to MemoryStream

Image.Save(..) throws a GDI+ exception because the memory stream is closed

http://alperguc.blogspot.in/2008/11/c-generic-error-occurred-in-gdi.html

EDIT:
just writing from memory...

save to an 'intermediary' memory stream, that should work

e.g. try this one - replace

    Bitmap newBitmap = new Bitmap(thumbBMP);
    thumbBMP.Dispose();
    thumbBMP = null;
    newBitmap.Save("~/image/thumbs/" + "t" + objPropBannerImage.ImageId, ImageFormat.Jpeg);

with something like:

string outputFileName = "...";
using (MemoryStream memory = new MemoryStream())
{
    using (FileStream fs = new FileStream(outputFileName, FileMode.Create, FileAccess.ReadWrite))
    {
        thumbBMP.Save(memory, ImageFormat.Jpeg);
        byte[] bytes = memory.ToArray();
        fs.Write(bytes, 0, bytes.Length);
    }
}

这篇关于在GDI +中Bitmap.Save方法发生一般性错误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！