C#使用jsonp进行跨域提交表单

跨域提交留言，并返回是否成功！

C#服务端：

public void FeedBackPost(string name, string email, string tel, string website, string desc, string thisIp, string sourse, string callBack)
        {
            try
            {
                Response.ContentType = "application/x-javascript";
                string str = callBack;
                if (thisIp==null)
                {
                    thisIp = "未取到IP";
                }
                string strSql = "";
                HSBY_DBEntities db = new HSBY_DBEntities();
                //验证ip短时间内是否提交太多
                Regex rx = new Regex(@"((?:(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d)))\.){3}(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d))))");
                if (rx.IsMatch(thisIp))
                {
                    strSql = @"select count(*) from fb_srv_main where ip='" + thisIp + "'";
                    int ipCount = db.ExecuteStoreQuery<int>(strSql).FirstOrDefault();
                    if (ipCount>10)
                    {
                        str += "([{\"请勿重复提交！\"}]);";
                        Response.Write(str);
                        return;
                    }
                }

                fb_srv_main newItem = new fb_srv_main();
                newItem.name = name;
                newItem.email = email;
                newItem.tel = tel;
                newItem.site = website;
                newItem.content_str = desc;
                newItem.ip = thisIp;
                newItem.creat_by = sourse;
                newItem.creat_on = DateTime.Now;
                _mainBLL.Create(ref validationErrors, newItem);

                //HttpContext context = new HttpContext();
                

                
                if (validationErrors.Count>0) 
                {
                    str+=validationErrors[0].ErrorMessage;
                    Response.Write(str);
                    return;
                }
                FeedBackEmail( name,  email,  tel,  website,  desc,  thisIp,  sourse);


                str += "([{\"Rusltstr\":\"OK\"}]);";
                Response.Write(str); 
                return;
            }
            catch (Exception ex)
            {
                Response.ContentType = "application/x-javascript";
                Response.Write(callBack + "([{\"Rusltstr\":\"出错了！\"}]);"); 
                return;
            }

        }

//提交留言返回数据处理
function displayResult(data) { 
               var iRusltstr=data[0].Rusltstr;
			   if(iRusltstr=="OK"){
				   		//关闭遮罩
						$("#submitmask").fadeOut(500);
						alert("提交成功！");
				   }else{
					   		$("#submitmask").fadeOut(500);
							alert(iRusltstr+" 请使用其他方式联系我们！");
					   }
           } 

//提交留言
function SubmitMsg(){
	var AllInput=$("#formwrap input");
	var iTextarea=$("#formwrap textarea");
	
		//获得焦点样式
		AllInput.focus(function(){AddFocusStyle($(this))});
		AllInput.blur(function(){AddFocusStyle($(this))});
		iTextarea.focus(function(){AddFocusStyle($(this))});
		iTextarea.blur(function(){AddFocusStyle($(this))});
		function AddFocusStyle(iInput){
				if(iInput.attr("style")=="" || iInput.attr("style")==null){
						iInput.attr("style","border:1px solid #bcbcbc;color:#7a7a7a;");
					}else{
							iInput.attr("style","");
						}
				
			}
			
		//丢失焦点验证
		AllInput.blur(function(){
				FormValiudat($(this));
			});
			
		//表单验证方法
		function FormValiudat($input){
				var promptStr="";
				var pattern = new RegExp("[~'!#$%^&*()-+_=]");
				if(pattern.test($input.val())){
					alert("非法字符！亲，请勿尝试注入哦！");
					return false;
				}
				
				switch($input.attr("id"))
				{
				case "name":
				  //姓
					if($input.val().length>10)
					{
						$("#redpoint_name").removeClass("hide");
						$input.focus();
						return false;
						}else{
								$("#redpoint_name").addClass("hide");
							}
						
				  break;
				case "email":
				  //email
					var reg = /^[a-z0-9]+([._\\-]*[a-z0-9])*@([a-z0-9]+[-a-z0-9]*[a-z0-9]+.){1,63}[a-z0-9]+$/;
					if (!reg.test($input.val())) {
					  	$("#redpoint_email").removeClass("hide");
						$input.focus();
						return false;
					}else{
							$("#redpoint_email").addClass("hide");
						}
						
				  break;
				  case "tel":
					//电话
					var isMobile=/^(?:13\d|15\d|18\d)\d{5}(\d{3}|\*{3})$/;   
					var isPhone=/^((0\d{2,3})-)?(\d{7,8})(-(\d{3,}))?$/;
					if(!isMobile.test($input.val()) && !isPhone.test($input.val())){
						$("#redpoint_tel").removeClass("hide");
						$input.focus();
						return false;
					}else{
							$("#redpoint_tel").addClass("hide");
						}
				  break;
				  case "website":
				  if(!(/[^\d]/g).test($input.val())){
						$("#redpoint_website").removeClass("hide");
						$input.focus();
						return false;
					}else{
							$("#redpoint_website").addClass("hide");
						}
				  break;
				  case "desc":
					  var mainText=$input.val();
					 if(mainText.length>=100){
							alert("最多100个字！");
							return false;
						}
				  break;
				}
			return true;
			}
			

	
	//表单提交
	$("#formsubmit").click(function(){
		var $feedback_input=$("#formleft input");
			for(var i=0;i<$feedback_input.length;i++){
				var $thisInput=$($feedback_input[i]);
					if(!FormValiudat($thisInput))
					{
						return;
					};
				}
	//提交表单前打开遮罩
	$("#submitmask").fadeIn(500);
	 
      
 
               
	   var url = "http://www.sparkdesign.cn:8888/MainAjax/FeedBackPost" 
	   url = "http://www.sparkdesign.cn:8888/MainAjax/FeedBackPost?name="+$("#name").val()+"&email="+$("#email").val()+"&tel="+$("#tel").val()+"&website="+$("#website").val()+"&desc="+$("#desc").val()+"&thisIp="+$("#keleyivisitorip").html()+"&callback=displayResult" 
	   $.getScript(url); 
 
               
 
         
	
				
				
		})
	
}