来自c#的FileContentResult通过javascript中的ajax调用另存为pdf

Question

我从 C# 控制器返回 pdf 字节数组，如下所示：

return new FileContentResult(pdfBytes, "application/pdf") { FileDownloadName = "test.pdf" };.

我的客户端代码如下。我无法从回复中成功下载 pdf 文件。我可以看到它在响应中返回 pdf（通过记录），但我在这里遗漏了一些东西

   $.ajax({
        type: "POST",
        url: config.ExportUrl,
        contentType: "application/json",
        data: JSON.stringify(params),
        success: (response, status, error) => {

            this.isExporting = false;
            var defaultFileName = "test.pdf";


            var blob = new Blob([response]);
            var blobUrl = window.URL.createObjectURL(blob);
            var anchor = document.createElement('a');
            anchor.download = defaultFileName;
            anchor.href = blobUrl;
            document.body.appendChild(anchor);
            anchor.click();
            document.body.removeChild(anchor);
            return response.content;
        },

任何帮助将不胜感激。 谢谢 安吉洛

Answer 1

找到了类似的帖子，如下所示，它有效：

    var req = new XMLHttpRequest();
    req.responseType = "blob";
    req.open("POST", config.ExportUrl, true);
    req.setRequestHeader('Content-Type', 'application/json');
    req.onreadystatechange = function () {
        if (req.readyState === 4 && req.status === 200) {
            if (typeof window.chrome !== 'undefined') {
                // Chrome version
                var link = document.createElement('a');
                link.href = window.URL.createObjectURL(req.response);
                link.download = defaultFileName;
                link.click();
            } else if (typeof window.navigator.msSaveBlob !== 'undefined') {
                // IE version
                var blob = new Blob([req.response], { type: 'application/pdf' });
                window.navigator.msSaveBlob(blob, defaultFileName);
            } else {
                // Firefox version
                var file = new File([req.response], defaultFileName, { type: 'application/force-download' });
                window.open(URL.createObjectURL(file));
            }
            //callback();
        }
    };
    req.send(JSON.stringify(params));