Two ways to implement ajax form submission with jquery

Method 1:

Obtain the required data elements separately. The outer layer of the DOM structure does not need to include the form tag (suitable for small amounts of data and data elements scattered throughout the page)

$.ajax({
　　type: 'POST',
   url:'',
   data: {
        residence:[$('#region_1').val(),$('#region_2').val(),$('#region_3').val()],
        address:$('#address').val()
   },
   dataType: 'json',
   success: function(data){
   },
   error:function(err){
   }
   });

Method 2:

Need to wrap the form tag (suitable for large amounts of data and concentrated elements)

function AddHandlingFeeToRefund()
        {var AjaxURL= "../OrderManagement/AjaxModifyOrderService.aspx";       
            alert($('#formAddHandlingFee').serialize());
                $.ajax({
                    type: "POST",
                    dataType: "html",
                    url: AjaxURL + '?Action=' + 'SubmitHandlingFee' + '&OrderNumber=' + $.trim($("#<%=this.txtOrderNumber.ClientID %>").val()),
                    data: $('#formAddHandlingFee').serialize(),
                    success: function (result) {var strresult=result;
                        alert(strresult);//加载最大可退金额$("#spanMaxAmount").html(strresult);
                    },
                    error: function(data) {
                        alert("error:"+data.responseText);
                     }
                });
        }

html code:

<form id="formAddHandlingFee" name="formAddHandlingFee" 
enctype="multipart/form-data" onsubmit="AddHandlingFeeToRefund()">
<table id="AddHandlingFee" class="Wfill">
<tr><td><asp:Literal ID="UI_Amount" runat="server" Text="处理费用" meta:resourcekey="HandlingFeeAmount" />
</td><td><input type="text" id="txtHandlingFeeAmount" name="txtHandlingFeeAmount"  
class="{required:true,number:true}" maxlength="12" />
</td></tr><tr><td>
<asp:Literal ID="UI_HandlingFeeType" runat="server" Text="费用类型" meta:resourcekey="HandlingFeeHandlingFeeType" />
</td><td><crmweb:HtmlSelectControl ID="HandlingFeeType" EnumTypeName="DX.OMS.Model.Common.HandlingFeeType,DX.OMS.Model.Common" EmptyValue="" EmptyText="Select" runat="server" class="text {required:true}"/>
</td></tr><tr><td><asp:Literal ID="UI_Notes" runat="server" Text="备注" meta:resourcekey="HandlingFeeNotes" /></td><td><textarea id="txtNotes" name="txtNotes" class="text {required:true}" 
cols="22" rows="2" maxlength="100"></textarea></td></tr><tr><td></td><td><input id="Submit1" type="submit" value="添加处理费"  />
<asp:Button ID="Button1"  runat="server" Text="添加处理费" OnClientClick="javascript:AddHandlingFeeToRefund()" /></td></tr></table>
</form>

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