C# 導出數據至 CSV

有時候將Excel的數據另存到csv文件會出現csv格式錯誤，以下示例實現將DataTable里面的數據直接保存到csv文件。

System.Web.HttpRuntime.Cache["v_ds"] = "";

這個v_ds是一個緩存，因為有時候由於頁面刷新會清空內存的數據，這里用緩存保存起來，當然還有很多其它的辦法。

DataTable dt = (DataTable)System.Web.HttpRuntime.Cache["v_ds"];

            Response.ClearContent();
            Response.AddHeader("content-disposition", "attachment; filename=" + DateTime.Now.ToString("yyyy-MM-dd") + ".csv");
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
            Response.ContentType = "application/excel";
            StringBuilder sb = new StringBuilder();
            sb.Append("工單號,棧板號,中箱號,SN,IMEID1,IMEID2,客戶PO\r\n");

            for (int i = 0; i < dt.Rows.Count; i++)
            {
                sb.Append("\"" + dt.Rows[i]["工單號"] + "\"" + ",");
                sb.Append("\"" + dt.Rows[i]["棧板號"] + "\"" + ",");
                sb.Append("\"" + dt.Rows[i]["中箱號"] + "\"" + ",");
                sb.Append("\"" + dt.Rows[i]["SN"] + "\"" + ",");
                sb.Append("\"" + dt.Rows[i]["IMEID1"] + "\"" + ",");
                sb.Append("\"" + dt.Rows[i]["IMEID2"] + "\"" + ",");                          
                sb.Append("\"" + dt.Rows[i]["客戶PO"] + "\"" + "\r\n");

            }

            Response.Write(sb.ToString());
            Response.End();