导出文件 下载 Xls 文件

            #region 导出文件
            private static void ImportPage(HttpContext Context, string app, string entity, string id)
            {
                #region 获取数据id
                AppEntity.App AppObj = AppEntity.GetApp(app);
                AppEntity.Entity En = AppObj.GetEntity(entity);
                #endregion
                string columns = Context.Request.Form["columns"];
                string striphtml = Context.Request.Form["striphtml"];
                XmlDocument ColDom = new XmlDocument();
                Hashtable param = new Hashtable();
                param.Add("appsetting", AppObj.AppDom);
                param.Add("entitysetting", En.EntityDom);
                param.Add("urn:functions-sbsinc-com:ext", new SBS.Common.XslExtensionObject());
                param.Add("urn:functions-sbsinc-com:AppEntity", new SBS.AppEntity.AppEntityXslExtension());
                param.Add("app", app);
                param.Add("entity", entity);
                param.Add("action", "export");
                param.Add("columns", ColDom);
                string Folder = AppEntity.GetAppFolder() + app + "http://www.cnblogs.com/jacd/admin/file://entity//" + entity + "http://www.cnblogs.com/jacd/admin/file://data//";
                string html = SBS.Common.Convert.xml2html("<root/>", AppEntity.GetThemePath() + "common\\import.xsl", param);
                Context.Response.Write(html);
            }
            private static void DownTemplate(HttpContext Context, string app, string entity, string id)
            {
                #region 获取数据id
                AppEntity.App AppObj = AppEntity.GetApp(app);
                AppEntity.Entity En = AppObj.GetEntity(entity);
                var columns = En.columns.ToHashSet();
                var sysColumnDict = AppEntity.GetAppBuilderSetting().Descendants("syscol").Elements("col").Select(
                    n => n.GetAttrValue("name")).ToHashSet();
                #endregion
                sysColumnDict.Remove("title");
                sysColumnDict.Remove("description");
                columns.ExceptWith(sysColumnDict);
                string filename = AppObj.name + "-" + En.title + ".csv";
                StreamWriter sw = new StreamWriter(Context.Response.OutputStream, Encoding.UTF8);
                StringBuilder sb = new StringBuilder();
                foreach (var c in columns)
                {
                    sb.Append(c + ",");
                }
                sw.Write(sb.ToString().Substring(0, sb.Length - 1));
                sw.Write("\r\n");
                if (filename != "")
                {
                    Context.Response.ContentEncoding = Encoding.UTF8;
                    Context.Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
                    //   Context.Response.ContentType = "application/octet-stream";
                    //   Context.Response.ContentType = "application/csv";
                    sw.Close();
                    Context.Response.End();
                }
            }
            #region 下载 Xls 文件
            private static void DownTemplateXls(HttpContext Context, string app, string entity, string id)
            {
                #region 获取数据id
                AppEntity.App AppObj = AppEntity.GetApp(app);
                AppEntity.Entity En = AppObj.GetEntity(entity);
                string tableName = "ColumnExample";
                var columns = En.columns.ToHashSet();
                var sysColumnDict = AppEntity.GetAppBuilderSetting().Descendants("syscol").Elements("col").Select(
                    n => n.GetAttrValue("name")).ToHashSet();
                sysColumnDict.Remove("title");
                sysColumnDict.Remove("description");
                columns.ExceptWith(sysColumnDict);
                StringBuilder sb = new StringBuilder();
                sb.Append(" CREATE TABLE " + tableName + " (");
                foreach (var c in columns)
                {
                    sb.Append(c + " VARCHAR(99),");
                }
                string CreateSql = sb.ToString();
                CreateSql = CreateSql.Trim(',');
                CreateSql = CreateSql + ")";
                #endregion
                string newFile = (Context.Server.MapPath(".") + "\\" + "TableColumn.xls");
                File.Delete(newFile);
                File.Copy(@"D:\tasktoday.353.us\fb.tasktoday.com\TableColumn.xls", newFile, true);
                string cnStr = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source =" +
                    newFile + ";Extended Properties=Excel 8.0";
                using (var cn = new OleDbConnection(cnStr))
                {
                    cn.Open();
                    var cmd = new OleDbCommand(CreateSql, cn);
                    cmd.ExecuteNonQuery();
                    cmd.Dispose();
                    cn.Close();
                }
                MemoryStream ms = new MemoryStream(File.ReadAllBytes(newFile));
                ms.WriteTo(Context.Response.OutputStream);
                ms.Close();
                Context.Response.ContentEncoding = Encoding.UTF8;
                string filename = AppObj.name + "-" + En.title + ".xls";
                Context.Response.AddHeader("Content-Disposition", "attachment; filename= " + filename);
                Context.Response.ContentType = "application/ms-excel";
                Context.Response.End();
            }
            #endregion
            #endregion

            /// <summary>
            /// CSV文件导入TABLE
            /// </summary>
            /// <param name="Context"></param>
            /// <param name="app"></param>
            /// <param name="entity"></param>
            private static void FileImport(HttpContext Context, string app, string entity)
            {
                AppEntity.Entity En = AppEntity.GetApp(app).GetEntity(entity);
                string Doublequotes = Context.Request.Form["Doublequotes"];
                char SplitStr = Context.Request.Form["SplitStr"][0];
                HttpPostedFile httpFile = Context.Request.Files["CSVfile"];
                string url = "/common/?app=" + app + "&entity=" + entity + "&action=import";
                if (httpFile.ContentLength < 1)
                {
                    Context.Response.Write("文件不能为空");
                    return;
                }
                if (httpFile.FileName.ToUpper().IndexOf("csv".ToUpper()) > 0)
                { 
                    WriteCSV(Context, En, Doublequotes, httpFile, url);
                }
                if (httpFile.FileName.ToUpper().IndexOf("xls".ToUpper()) > 0 )
                { 
                    WriteXls(Context, En, Doublequotes, httpFile, url);
                }

            } 
            private static void WriteCSV(HttpContext Context, AppEntity.Entity En, string Doublequotes, HttpPostedFile httpFile, string url)
            { 
                string dir = Path.GetTempPath();
                string fileName = Path.Combine(dir, "importdata.csv");
                File.Delete(fileName);
                httpFile.SaveAs(fileName);
                string tableName = "[importdata.csv]";
                string cnStr =
                  "Provider=Microsoft.Jet.OLEDB.4.0;" +
                  "Extended Properties='text;HDR=Yes;FMT=Delimited';" +
                  "Data Source=" + dir + ";";
                WriteToTable(cnStr,Context, En, Doublequotes, url, dir, tableName);
            }
            private static void WriteXls(HttpContext Context, AppEntity.Entity En, string Doublequotes, HttpPostedFile httpFile, string url)
            {
                string dir = Context.Server.MapPath(".");
                string fileName = Path.Combine(dir, "TableColumnEntity.xls"); 
                File.Delete(fileName);
                httpFile.SaveAs(fileName);
                string tableName = "[ColumnExample$]";
                string cnStr = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source =" +
                 fileName + ";Extended Properties=Excel 8.0"; 
                WriteToTable(cnStr,Context, En, Doublequotes, url, fileName, tableName);
            }

            private static void WriteToTable(string cnStr,HttpContext Context, AppEntity.Entity En, string Doublequotes, string url, string DataSouce, string tableName)
            {
              
                DataTable dTab = new DataTable();
                int ValueCount = 0;
                using (var cn = new OleDbConnection(cnStr))
                {
                    cn.Open();
                    string sql = "SELECT * FROM " + tableName;
                    OleDbDataAdapter da = new OleDbDataAdapter(sql, cn);
                    da.Fill(dTab);
                    for (int i = 0; i < dTab.Rows.Count; i++)
                    {
                        AppEntity.Record row = En.Create();
                        foreach (DataColumn column in dTab.Columns)
                        {
                            string value = dTab.Rows[i][column].ToString();
                            string ColumnName = column.ColumnName;
                            if (Doublequotes == "N")
                            {
                                value = value.Trim('"');
                            }
                            if (En.GetColumn(ColumnName).type == "double" ||
                                En.GetColumn(ColumnName).type == "integer")
                            {
                                    value=(value.ToDouble(0)).ToString();
                            }
                            if (En.GetColumn(ColumnName).type == "datetime" ||
                                En.GetColumn(ColumnName).type == "date")
                            {
                                value = SBS.Common.Utility.GetNowTime(value.ToDateTime(DateTime.Now));
                            }
                            row.SetColumnValue(ColumnName, value);
                        }
                        try
                        {
                            row.Add();
                            ValueCount++;
                        }
                        catch
                        {
                        }
                    } 
                    Context.Response.Redirect(url + "&ValueCount=" + ValueCount);
                }
            }