经过长时间的奋斗，我找到了原因.导致该错误的原因是，当从编程上下文传递字符串时，它会继续添加到 System.Web.HttpResponseBase Response 对象中.当我通过硬编码直接传递字符串时，它不会再混乱 System.Web.HttpResponseBase响应对象.因此，最终的解决方案是添加一段代码 Response.clear(); ，以清除所有先前的Response对象.现在，它的工作正常.谢谢大家的建议.欢呼！！

After a long struggle I found the reason. The error is caused because when the string is passed from the programming context it keeps on adding to System.Web.HttpResponseBase Response object. when I pass the string directly by hard coding it is not messing again with System.Web.HttpResponseBase Response object. So the final solution is to add a piece of code Response.clear(); which clears all the previous Response objects. Now its working fine. Thanks all for your suggestions. cheers!!