我想展示带有*.ico
扩展名的图片,并使用Stream
来执行此操作。但我有一个问题。
使用扩展程序*.jpg
,*.bmp
...图片显示确定但*.ico
,但未显示
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();
}
}
}
请帮我解决这个问题。
答案 0 :(得分:4)
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”的内容类型可能为image/vnd.microsoft.icon
,但this post似乎表明您可能遇到此类问题)
代码应该类似于:
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";