Web API之Retrieve Multiple

 var    filter = "?$filter=name eq '123'";
     var req = new XMLHttpRequest()
     req.open("get", encodeURI(Xrm.Page.context.getClientUrl() + "/api/data/v8.0/accounts/" + filter, false));
     req.setRequestHeader("Accept", "application/json");
     req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
     req.setRequestHeader("OData-MaxVersion", "4.0");
     req.setRequestHeader("OData-Version", "4.0");
     req.onreadystatechange = function () {
         if (this.readyState == 4) {
             if (this.status == 200) {
                 var data=JSON.parse(this.responseText).value;
             }
             else {
                 var data=this.responseText;
             }
         }
     };
     req.send();

结果如下图，一个object即为一条数据记录，filter的写法和odata时一致。

      这里着重提下lookup字段的filter写法和原来的不大一样，这里lookup字段你的属性名为new_testid,在filter中的写法是_new_testid_value后面直接eq,另外个要注意的是guid上往往会带左右大括号{}，这个得去掉，简单的说就是严格遵守odata version4.0的语法就对了。