如何从JavaScript调用C＃函数？

您可以使用Web方法和Ajax：

<script type="text/javascript">  //Default.aspx   function DeleteKartItems() {   $.ajax({         type: "POST",         url: 'Default.aspx/DeleteItem',         data: "",         contentType: "application/json; charset=utf-8",         dataType: "json",         success: function (msg) {  $("#divResult").html("success");         },         error: function (e) {  $("#divResult").html("Something Wrong.");         }     });   }</script>[WebMethod]//Default.aspx.cspublic static void DeleteItem(){    //Your Logic}