fetch请求后端返回文件流，并下载。

前端：

<script src="~/layui/layui.js"></script>
<script src="~/Content/js/common/js/vue.min.js"></script>
<script src="~/Content/js/common/js/jquery-1.10.2.min.js"></script><style>
</style><label class="dgFilterLBBold" style="margin-left: 10px;">日期:</label>
<div class="layui-inline"><input type="text" id="Month" class="layui-input" style="width: 150px; margin-right: 10px; height: 30px; margin-top: 5px;">
</div>
<span class="ql-formats"><button class="layui-btn layui-btn-normal layui-btn-sm" onclick="GenReport()" style="margin-top: 3px;width: 80px;">生成报表</button></span><script>function GenReport() {fetch('/ReportAirRank/GenReport?beginTime=' + $('#Month').val()).then(res => res.blob()).then(blob => {const url = URL.createObjectURL(blob);let a = document.createElement('a');a.href = url;a.download = "湖北省城市及县域环境空气质量排名.doc";a.click();a.remove(); //window.open(url, "湖北省城市及县域环境空气质量排名.doc")window.URL.revokeObjectURL(url); // 释放掉blob对象});}layui.use(['laydate', 'layer'], function () {laydate = layui.laydate;layer = layui.layer;laydate.render({elem: '#Month',type: 'month',format: 'yyyy-MM',done: function (value, date) {}});});</script>

后端

 public ActionResult GenReport(StatisticQuery model){string path = string.Empty;path = Server.MapPath("~/Document/Word/空气质量排名情况/省生态环境厅公布" + model.beginTime.ToString("yyyy年M月") + "和1-" + model.beginTime.ToString("M月") + "湖北省城市及县域环境空气质量排名.doc");//上载路径string tmppath = Server.MapPath("~/uploads/Reports/全省城市及县域环境空气质量排名情况.docx");//模板string fileName = path.Substring(path.LastIndexOf('\\') + 1);Aspose.Words.Document doc = new Document(tmppath);Aspose.Words.DocumentBuilder builder = new DocumentBuilder(doc);if (doc.Range.Bookmarks["SDateTime"] != null){doc.Range.Bookmarks["SDateTime"].Text = DateTime.Now.ToString("yyyy年MM月dd日");}for (int i = 2; i <= 9; i++){if (doc.Range.Bookmarks["Y" + i] != null){doc.Range.Bookmarks["Y" + i].Text = model.beginTime.Year.ToString();}}for (int i = 2; i <= 40; i++){if (doc.Range.Bookmarks["M" + i] != null){doc.Range.Bookmarks["M" + i].Text = model.beginTime.Month.ToString();}}BaseDao dao = new BaseDao();AirRankModel arm = new AirRankModel();Type t = typeof(AirRankModel);PropertyInfo[] properties = t.GetProperties();foreach (PropertyInfo property in properties){if (doc.Range.Bookmarks[property.Name] != null){if (property.GetValue(arm) != null && property.GetValue(arm).ToString() != ""){doc.Range.Bookmarks[property.Name].Text = property.GetValue(arm)?.ToString();}else{doc.Range.Bookmarks[property.Name].Text = "";}}}//FileHelper.DeleteFile(path);doc.Save(path, Aspose.Words.SaveFormat.Doc);var stream = System.IO.File.OpenRead(path); //Path.GetExtensionreturn File(stream, "application/msword", "湖北省城市及县域环境空气质量排名.doc");}

AirRankModel类