Json文件转Excel

Posted 2021-01-13 Henry

先创建一个web项目，在根目录放置需要转换的json文件，直接读取静态Json文件加载数据进行转换，代码如下：

string Json = string.Empty;
            List<object> list = new List<object>();
            string filePath = Server.MapPath("/***.json");//指定目录下的json文件(当前为根目录)
            using (FileStream fs = new FileStream(filePath, FileMode.Open, System.IO.FileAccess.Read, FileShare.ReadWrite))
            {
                using (StreamReader sr = new StreamReader(fs, Encoding.GetEncoding("gb2312")))
                {
                    Json = sr.ReadToEnd().ToString();
                }
            }

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接着引入Newtonsoft.Json 文件，将Json字符串转Datatable

 DataTable dt = (DataTable)JsonConvert.DeserializeObject(Json, typeof(DataTable));

然后将Datable转成Dataset

DataSet ds = new DataSet();
ds.Tables.Add(dt);

最后直接用Response导出结果：

ExportResult(ds, "Json.xls");//Json.xls名字自定义

用到的ExportResult方法代码如下：

/// <summary>
        /// 将ds转换成excel
        /// </summary>
        /// <param name="ds"></param>
        /// <param name="excelName"></param>
        public void ExportResult(DataSet ds, string excelName)
        {
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.Charset = "";
            HttpContext.Current.Response.ContentType = "application/vnd.ms-xls";
            StringWriter stringWrite = new StringWriter();
            htmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);

            DataGrid dg = new DataGrid();
            dg.DataSource = ds;
            dg.DataBind();
            dg.RenderControl(htmlWrite);
            HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + HttpUtility.UrlEncode(excelName));
            HttpContext.Current.Response.Write(stringWrite.ToString());
            HttpContext.Current.Response.End();
        }

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以上为楼主总结，如有更好的方法请留言推荐，谢谢！

*：如需转发请标注来源，谢谢！