如何将对象转换成xml字符串

如有如下对象: var formObj= {"Columns":[{"Calculated":false,"Default":"","Identity":true,"InnerType":null,"IsNull":false,"Length":null,"Memo":"自動增長","Name":"ID","PrimaryKey":false,"Scale":0,"Type":"20","Unique":false},{"Calculated":false,"Default":"","Identity":false,"InnerType":null,"IsNull":true,"Length":"36","Memo":"主鍵","Name":"GUID","PrimaryKey":true,"Scale":0,"Type":"10","Unique":false},{"Calculated":false,"Default":"","Identity":false,"InnerType":null,"IsNull":false,"Length":"36","Memo":"作者","Name":"Author","PrimaryKey":false,"Scale":0,"Type":"10","Unique":false},{"Calculated":false,"Default":"","Identity":false,"InnerType":null,"IsNull":false,"Length":null,"Memo":"創建日期","Name":"Created","PrimaryKey":false,"Scale":0,"Type":"40","Unique":false},{"Calculated":false,"Default":"","Identity":false,"InnerType":null,"IsNull":true,"Length":"36","Memo":"最后修改人","Name":"Editor","PrimaryKey":false,"Scale":0,"Type":"10","Unique":false},{"Calculated":false,"Default":"","Identity":false,"InnerType":null,"IsNull":true,"Length":null,"Memo":"最后修改日期","Name":"Modified","PrimaryKey":false,"Scale":0,"Type":"40","Unique":false},{"Calculated":false,"Default":"","Identity":false,"InnerType":null,"IsNull":true,"Length":"50","Memo":"聯絡人姓名","Name":"Name","PrimaryKey":false,"Scale":0,"Type":"10","Unique":false},{"Calculated":false,"Default":"","Identity":false,"InnerType":null,"IsNull":true,"Length":"10","Memo":"聯絡人性別","Name":"Sex","PrimaryKey":false,"Scale":0,"Type":"10","Unique":false},{"Calculated":false,"Default":"","Identity":false,"InnerType":null,"IsNull":true,"Length":"20","Memo":"聯絡人電話","Name":"Tel","PrimaryKey":false,"Scale":0,"Type":"10","Unique":false},{"Calculated":false,"Default":"","Identity":false,"InnerType":null,"IsNull":true,"Length":"2000","Memo":"備註","Name":"Memo","PrimaryKey":false,"Scale":0,"Type":"10","Unique":false}],"FKeys":[],"Name":"Order","Owner":null,"Qualifier":null,"Type":null,"BLLPath":"G:\\AP\\RD\\YDXCC\\Project\\BLL\\","Categorys":[{"Code":"Orders","Name":"訂單管理"}],"DALPath":"G:\\AP\\RD\\YDXCC\\Project\\DAL\\","Executes":[{"DeleteCondition":[{"FieldName":"GUID","Name":"GUID","Operator":0}],"Insert":["GUID","Author","Created","Name","Sex","Tel","Memo"],"Name":"default","PrimaryKey":["GUID"],"Select":["ID","GUID","Author","Created","Editor","Modified","Name","Sex","Tel","Memo"],"SelectCondition":[{"FieldName":"GUID","Name":"GUID","Operator":0},{"FieldName":"Name","Name":"Name","Operator":6},{"FieldName":"Sex","Name":"Sex","Operator":8}],"Sort":[{"Direction":1,"Index":1,"Name":"GUID"}],"TableName":null,"Update":["Editor","Modified"],"UpdateCondition":[{"FieldName":"GUID","Name":"GUID","Operator":0}]}],"Memo":"訂單表","ModelPath":"G:\\AP\\RD\\YDXCC\\Project\\Model\\","WebSitePath":null};
如何转换成xml字符串？求解决方案?