send input select value to @Url.Action

Question

                <div class="input-group-prepend">
                    <label class="input-group-text" for="inputGroupSelect01lbl">Select the Month  </label>
                </div>
                <select class="custom-select" id="inputGroupSelect01"></select>
                <div class="input-group-append">
                    <a ng-click="getTeamAttenbydt()"> <span class="input-group-text" id="basic-addon2">Review</span></a>
                    <a href="@Url.Action("DownloadPartialViewPDF", "MyCalender")?dat='sss' "><img src="~/Images/pdfdownload.png" style="width: 35px;margin-left: 12px;margin-top: 1px;margin-right: 12px;" /></a>
                </div>

            </div>

i want to send the value of inputGroupSelect01 to the url.action parameter (dat)

i mean that i want to send the value of inputGroupSelect01 instead of sss