使用流显示图像*.ico
本文关键字:图像 ico 显示图 显示 | 更新日期: 2023-09-27 18:26:08
我想用扩展名*.ico
显示图像,我用Stream
来做。但我有一个问题。
带扩展*.jpg
、*.bmp
。。。图像显示正常,但*.ico
,不显示
这是我的代码:
private void OutputStream(string fileName)
{
try
{
Stream dataStream = null;
SPSecurity.RunWithElevatedPrivileges(delegate()
{
SPFile spFile = web.GetFile(fileName);
dataStream = spFile.OpenBinaryStream();
this.HandleOutputStream(dataStream);
});
}
catch (System.Threading.ThreadAbortException exTemp)
{
logger.Error("KBStreamPicture::OutputStream", exTemp);
}
catch (Exception ex)
{
//System.Diagnostics.Debug.Write("OutputStream::" + ex);
logger.Error("KBStreamPicture::OutputStream", ex);
}
}
和
private void HandleOutputStream(Stream dataStream)
{
const int bufferSize = 16384; //16KB
using (Stream file = dataStream)
{
if (file != null)
{
this.Page.Response.Clear();
this.Page.Response.Cache.SetCacheability(System.Web.HttpCacheability.Private);
this.Page.Response.Cache.SetExpires(DateTime.Now.AddMinutes(20)); //only cache 20 minutes
byte[] buffer = new byte[bufferSize];
int count = file.Read(buffer, 0, bufferSize);
while (count > 0)
{
if (this.Page.Response.IsClientConnected)
{
this.Page.Response.OutputStream.Write(buffer, 0, count);
count = file.Read(buffer, 0, bufferSize);
}
else
{
count = -1;
}
}
this.Page.Response.End();
}
}
}
请帮我解决那个问题。
您没有在Response
上设置ContentType属性。尝试将ContentType
设置为image/x-icon
(请注意,"正确"的内容类型可能是image/vnd.microsoft.icon
,但这篇文章似乎表明您可能会遇到该类型的问题)。
代码应该看起来像:
this.Page.Response.Clear();
this.Page.Response.Cache.SetCacheability(System.Web.HttpCacheability.Private);
this.Page.Response.Cache.SetExpires(DateTime.Now.AddMinutes(20));
this.Page.Response.ContentType = "image/x-icon";