我有一个MVC3应用程序,用户可以上传文件,然后随时查看或下载它们。以下代码在IE中按预期工作(我的弹出窗口出现,文件在其中呈现)但在Firefox中我得到打开的/保存文件对话框,我的文件在弹出窗口中不呈现。在chrome中,文件只是自动下载。继承我的代码:
//for brevity i'm not showing how i get the file stream to display,
//but that code works fine, also the ContentType is set properly as well
public class BinaryContentResult : ActionResult
{
private readonly string ContentType;
private readonly string FileName;
private readonly int Length;
private readonly byte[] ContentBytes;
public BinaryContentResult(byte[] contentBytes, string contentType, string fileName, int nLength)
{
ContentBytes = contentBytes;
ContentType = contentType;
FileName = fileName;
Length = nLength;
}
public override void ExecuteResult(ControllerContext context)
{
var response = context.HttpContext.Response; //current context being passed in
response.Clear();
response.Cache.SetCacheability(HttpCacheability.NoCache);
response.ContentType = ContentType;
if (ext.ToLower().IndexOf(".pdf") == -1)
{
//if i comment out this line, jpg files open fine but not png
response.AddHeader("Content-Disposition", "application; filename=" + FileName);
response.AddHeader("Content-Length", Length.ToString());
response.ContentEncoding = System.Text.Encoding.UTF8;
}
var stream = new MemoryStream(ContentBytes); //byte[] ContentBytes;
stream.WriteTo(response.OutputStream);
stream.Dispose();
}
}
继承我的观点:
public ActionResult _ShowDocument(string id)
{
int nLength = fileStream.Length;//fileStream is a Stream object containing the file to display
return new BinaryContentResult(byteInfo, contentType, FileName,nLength);
}
对于PDf和纯文本文件,这是全面的,但对于jpg和png文件,我得到了下载对话框。如何在我的弹出窗口中创建Firefox / Chrome打开文件,就像他们在Firefox / Chrome中执行PDF文件一样?感谢
答案 0 :(得分:2)
您需要发送一些标题,以便浏览器知道如何处理您正在传输的内容。特别是:
Response.ContentType = "image/png"
Response.ContentType = "image/jpg"
等
另请注意,对于与PDF不同的内容,您要将内容处置设置为"Content-Disposition", "application; filename=" + FileName)
,这将强行下载。