jquery ajax生成Select

function DropDownList(url, domId, defaultValue) {
    /// <summary>
    /// ajax生成select
    /// </summary>
    /// <param name="url">数据请求路径</param>
    /// <param name="domId">dom元素id</param>
    /// <param name="defaultValue">默认选中值</param>
    $.get(url, {}, function (msg) {
        $("#" + domId).append("<option value='-1'>请选择</option>");
        $(msg).each(function (i, e) {
            $("#" + domId).append("<option value='" + e.Key + "'>" + e.Value + "</option>");
        });
        $("#" + domId).val(defaultValue);
    });
}

<select id='test'></select>

使用如:

DropDownList("xxx","test",1)