问ASP.NET表单从javascript强制重新加载与JQuery自动完成文本框填充冲突？

EN

<asp:TextBox ID="_txtData" runat="server" ClientIDMode="Static" />
<asp:HiddenField ID="_hdnData" runat="server" ClientIDMode="Static" Value="" />
<asp:DropDownList ID="_ddlData" runat="server" DataSourceID="_sdsData" DataTextField="data" DataValueField="id" AppendDataBoundItems="true" AutoPostBack="true" >
    <asp:ListItem Text="TUTTI" Value="" Selected="True" />
</asp:DropDownList>

<asp:SqlDataSource
    ID="_sdsData" 
    runat="server"
    ConnectionString="<%$ ConnectionStrings:db %>"
    ProviderName="<%$ ConnectionStrings:db.ProviderName %>"
    SelectCommand="
        SELECT 
            id, 
            data
        FROM 
            table_data
        WHERE 
            (@id IS NULL) OR (id = @id)
        ORDER BY targa">
        <SelectParameters>
            <asp:ControlParameter 
                ControlID="_hdnData" 
                PropertyName="Value" 
                Direction="Input" 
                ConvertEmptyStringToNull="true" 
                DbType="Int32" 
                DefaultValue="" 
                Name="id" />
        </SelectParameters>
</asp:SqlDataSource> 

var _hdnData = null;
var _txtData = null;

$(function () {
    _hdnData = $("input[id$='_hdnData']");
    _txtData = $("input[id$='_txtData']");

    GetData(_txtData , _hdnData );
});

function GetData(source_widget, dest_widget) {
    $.ajax({
        type: "POST",
        url: "/Service/WSDataService.asmx/GetData",
        dataType: "json",
        data: "{}",
        contentType: "application/json; charset=utf-8",
        success: function (data) {
            var datafromServer = data.d.split("<br />");

            source_widget.autocomplete({
                source: datafromServer,
                select: function (event, ui) {
                    var _data = ui.item.value;

                    var _tokens = _data.split("\t");


                    if (_tokens.length < 3)
                        return;

                    var _value = _tokens[_tokens.length - 1].replace(']', '').replace('[', '');

                    dest_widget.val(_value).closest("form").submit();
                }
            });
        },
        error: function (XMLHttpRequest, textStatus, errorThrown) {
            alert(textStatus);
        }
    });
}

var _hdnData = null;
var _txtData = null;

$.postJSON = function (url, data, success) {
    return $.ajax({
        type: "POST",
        url: url,
        data: JSON.stringify(data),
        contentType: "application/json; charset=utf-8",
        success: success || null
    });
};

var raw_data = $.postJSON("/Service/WSDataService.asmx/GetData", {})
    .then(function (data) {
        return data.d.split("<br />");
    })
    .fail(function (XMLHttpRequest, textStatus, errorThrown) {
        alert(textStatus);
    });

$(function () {
    raw_data.done(function (items) {
        $("input[id$='_txtData']").autocomplete({
            source: items,
            select: function (event, ui) {
                var _data = ui.item, _value;

                // calculate _value ...
                $("input[id$='_hdnData ']")
                    .val(_value)
                    .closest("form").submit();
            }
        });
    });
});