防止代码提示用户保存文件

我在我的报表控制器中使用下面的方法。它成功返回我分配给数据库中varBinary（MAX）字段的文件内容。我的问题是，执行此代码时会导致浏览器提示用户保存或打开文件。我想阻止这种事情发生。防止代码提示用户保存文件

如何强制它只将二进制数据返回给调用控制器方法，而不是将结果推送到客户端浏览器？

private FileContentResult RenderReportFile(LocalReport localReport, List<ReportDataSource> listDS, string sFilename, string sReportType, bool bLandscape) 
{ 
    string sHeight = "11"; 
    string sWidth = "8.5"; 

    if (bLandscape) 
    { sWidth = sHeight; sHeight = "8.5"; } 

    foreach (ReportDataSource ds in listDS) 
    { 
     localReport.DataSources.Add(ds); 
    } 

    HttpContextBase imageDirectoryPath = HttpContext; 

    string reportType = sReportType; 
    string mimeType; 
    string encoding; 
    string fileNameExtension; 

    //The DeviceInfo settings should be changed based on the reportType 
    string deviceInfo = 
     "<DeviceInfo>" + 
     " <OutputFormat>" + sReportType + "</OutputFormat>" + 
     " <PageWidth>" + sWidth + "in</PageWidth>" + 
     " <PageHeight>" + sHeight + "in</PageHeight>" + 
     " <MarginTop>0.5in</MarginTop>" + 
     " <MarginLeft>0.5in</MarginLeft>" + 
     " <MarginRight>0.5in</MarginRight>" + 
     " <MarginBottom>0.5in</MarginBottom>" + 
     "</DeviceInfo>"; 

    Warning[] warnings; 
    string[] streams; 
    byte[] renderedBytes; 

    //Render 
    renderedBytes = localReport.Render(
     reportType, 
     deviceInfo, 
     out mimeType, 
     out encoding, 
     out fileNameExtension, 
     out streams, 
     out warnings); 


    //Write to the outputstream 
    //Set content-disposition to "attachment" so that user is prompted to take an action 
    //on the file (open or save) 

    Response.Clear(); 
    Response.ContentType = mimeType; 
    Response.AddHeader("content-disposition", "attachment; filename=" + sFilename + "." + fileNameExtension); 
    Response.BinaryWrite(renderedBytes); 
    Response.End(); 
    return File(renderedBytes, "application/pdf", sFilename + "." + fileNameExtension); 
}

来源

2014-12-05 John

不使用内容处置。 – 2014-12-05 13:03:31

为什么你不想把它推到客户端？你想用它做什么？ – 2014-12-05 13:05:03

你为什么直接操纵'Response'？ – 2014-12-05 13:13:24

此代码是负责文件发送到客户端：

Response.Clear(); 
Response.ContentType = mimeType; 
Response.AddHeader("content-disposition", "attachment; filename=" + sFilename + "." + fileNameExtension); 
Response.BinaryWrite(renderedBytes); 
Response.End();

删除它，用户将不会被提示保存或打开。

来源

2014-12-05 13:05:52 Peter

防止代码提示用户保存文件

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