当正从我的数据库加载我的Web服务器上我的图片,我看到以下错误:GDI +一般性错误
我所有的代码正在尝试做的是加载图像A generic error occurred in GDI+. at System.Drawing.Image.Save(Stream stream, ImageCodecInfo encoder, EncoderParameters encoderParams) at System.Drawing.Image.Save(Stream stream, ImageFormat format) at MyWeb.Helpers.ImageHandler.ProcessRequest(HttpContext context)
,任何人可以看看让我知道我在做什么错了?
注 - 如果我在本地机器上测试它,但在将其部署到我的Web服务器时不起作用。
public void ProcessRequest(HttpContext context)
{
context.Response.Clear();
if (!String.IsNullOrEmpty(context.Request.QueryString["imageid"]))
{
int imageID = Convert.ToInt32(context.Request.QueryString["imageid"]);
int isThumbnail = Convert.ToInt32(context.Request.QueryString["thumbnail"]);
// Retrieve this image from the database
Image image = GetImage(imageID);
// Make it a thumbmail if requested
if (isThumbnail == 1)
{
Image.GetThumbnailImageAbort myCallback = new Image.GetThumbnailImageAbort(ThumbnailCallback);
image = image.GetThumbnailImage(200, 200, myCallback, IntPtr.Zero);
}
context.Response.ContentType = "image/png";
// Save the image to the OutputStream
image.Save(context.Response.OutputStream, ImageFormat.Png);
}
else
{
context.Response.ContentType = "text/html";
context.Response.Write("<p>Error: Image ID is not valid - image may have been deleted from the database.</p>");
}
}
错误发生就行了:
image.Save(context.Response.OutputStream, ImageFormat.Png);
UPDATE
我已经改变了我的代码本,位问题仍然发生了:
var db = new MyWebEntities();
var screenshotData = (from screenshots in db.screenshots
where screenshots.id == imageID
select new ImageModel
{
ID = screenshots.id,
Language = screenshots.language,
ScreenshotByte = screenshots.screen_shot,
ProjectID = screenshots.projects_ID
});
foreach (ImageModel info in screenshotData)
{
using (MemoryStream ms = new MemoryStream(info.ScreenshotByte))
{
Image image = Image.FromStream(ms);
// Make it a thumbmail if requested
if (isThumbnail == 1)
{
Image.GetThumbnailImageAbort myCallback = new Image.GetThumbnailImageAbort(ThumbnailCallback);
image = image.GetThumbnailImage(200, 200, myCallback, IntPtr.Zero);
}
context.Response.ContentType = "image/png";
// Save the image to the OutputStream
image.Save(context.Response.OutputStream, ImageFormat.Png);
} }
谢谢。
嗨贾斯汀,我想我已经改变了我的代码,以避免这种情况,但我仍然看到这个问题 - 你能看看我更新的问题吗?另外,奇怪的是,这可以在我的开发盒上运行,但是当我将它部署到服务器时却不行。 –
@JimmyC不知道,图像**很**大吗? GDI +似乎强加了64K的高度限制。或者,您是否知道这是否仅适用于缩略图?你也可以确定'ThumbnailCallback'没有抛出异常吗? – Justin
图像非常小。这发生在缩略图和正常大小的图像上。在我看来,像一个配置问题,由于它在我的本地机器上工作,但我不知道什么类型的配置问题可能会导致此错误。 –