读取二进制文件并使用response.binarywrite()。

尝试添加

响应。

在调用Response.BinaryWrite()之后。

在response.binarywrite之后,您可能无意中发送了其他内容,这可能会混淆浏览器。end将确保浏览器只得到您真正想要的。

        Response.BinaryWrite(bytes);
        Response.Flush();
        Response.Close();
        Response.End();

这对我们有用。我们从SQL Reporting Services创建PDF。

我们已经成功地使用了它。writefile为您完成下载,并在结尾处使用flush/end将其全部发送给客户机。

            //Use these headers to display a saves as / download
            //Response.ContentType = "application/octet-stream";
            //Response.AddHeader("Content-Disposition", String.Format("attachment; filename={0}.pdf", Path.GetFileName(Path)));

            Response.ContentType = "application/pdf";
            Response.AddHeader("Content-Disposition", String.Format("inline; filename={0}.pdf", Path.GetFileName(Path)));

            Response.WriteFile(path);
            Response.Flush();
            Response.End();

既然您直接从文件系统发送文件,而不进行中间处理,为什么不使用 Response.TransmitFile 相反?

Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition",
    "attachment; filename=\"" + Path.GetFileName(path) + "\"");
Response.TransmitFile(path);
Response.End();

(我怀疑你的问题是由于 Response.End ,这意味着您将发送附加到PDF数据的页面内容的其余部分。)

仅供将来参考,如本文所述: http://blogs.msdn.com/b/aspnetue/archive/2010/05/25/response-end-response-close-and-how-customer-feedback-helps-us-improve-msdn-documentation.aspx

它是 不 建议拨打 Response.Close() 或 Response.End() 取而代之的是使用 CompleteRequest() .

您的代码看起来有点像这样:

    byte[] bytes = {};

    bytes = GetBytesFromDB();  // I use a similar way to get pdf data from my DB

    Response.Clear();
    Response.ClearHeaders();
    Response.Buffer = true;
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.ContentType = "application/pdf";
    Response.AppendHeader("Content-Disposition", "attachment; filename=" + anhangTitel);
    Response.AppendHeader("Content-Length", bytes.Length.ToString());
    this.Context.ApplicationInstance.CompleteRequest();

请在使用response.transmitfile之前阅读此内容: http://improve.dk/blog/2008/03/29/response-transmitfile-close-will-kill-your-application

可能缺少响应。关闭de binary流

在我的MVC应用程序中,我为所有响应启用了gzip压缩。如果您正在从带有gzip响应的Ajax调用中读取此二进制写入,那么您将获得gzip字节数组,而不是需要使用的原始字节数组。

//c# controller is compressing the result after the response.binarywrite

[compress]
public ActionResult Print(int id)       
{
... 
var byteArray=someService.BuildPdf(id);
return  return this.PDF(byteArray, "test.pdf");
}

//where PDF is a custom actionresult that eventually does this:
 public class PDFResult : ActionResult
{
...
    public override void ExecuteResult(ControllerContext context)
    {
        //Set the HTTP header to excel for download
        HttpContext.Current.Response.Clear();
        //HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
        HttpContext.Current.Response.ContentType = "application/pdf";
        HttpContext.Current.Response.AddHeader("content-disposition", string.Concat("attachment; filename=", fileName));
        HttpContext.Current.Response.AddHeader("Content-Length", pdfBytes.Length.ToString());
        //Write the pdf file as a byte array to the page
        HttpContext.Current.Response.BinaryWrite(byteArray);
        HttpContext.Current.Response.End();
    }
}

//javascript

function pdf(mySearchObject) {
    return $http({
    method: 'Post',
    url: '/api/print/',
    data: mySearchObject,
    responseType: 'arraybuffer',
    headers: {
    'Accept': 'application/pdf',
    }
    }).then(function (response) {

var type = response.headers('Content-Type');
//if response.data is gzipped, this blob will be incorrect.  you have to uncompress it first.
var blob = new Blob([response.data], { type: type });
var fileName = response.headers('content-disposition').split('=').pop();

if (window.navigator.msSaveOrOpenBlob) { // for IE and Edge
    window.navigator.msSaveBlob(blob, fileName);
} else {

    var anchor = angular.element('<a/>');
    anchor.css({ display: 'none' }); // Make sure it's not visible
    angular.element(document.body).append(anchor); // Attach to document

    anchor.attr({
    href: URL.createObjectURL(blob),
    target: '_blank',
    download: fileName
    })[0].click();

    anchor.remove();
}
});

}

“var blob=新blob([response.data],类型:类型];” 如果您不首先解压缩,那么当您将字节数组转换为JavaScript中的文件时,这将给您提供一个试图打开的无效/损坏的文件。

要解决此问题,您可以选择阻止gzip压缩此二进制数据,以便将其正确转换为正在下载的文件,或者在将其转换为文件之前,必须在JavaScript代码中解压缩该gzip数据。

除了igor的response.close()之外,我还将添加response.flush()。

我还发现有必要增加以下内容:

Response.Encoding = Encoding.Default

如果我不包括这个,我的jpeg就损坏了,以字节为单位的大小增加了一倍。

但仅当处理程序从ASPX页返回时。它似乎是从一个阿什克斯运行这是不需要的。