2、来电弹屏省份保存过后，客户再打进来不显示省份

codegit/CallCenterApi/CallCenterApi.Interface/CallCenterApi.Interface/Controllers/customer/CustomerController.cs

                         model = bll.GetModel(cid);
                         if (model != null)
                         {
-                            model.F_CustomerName = name;
-                            model.F_Province = province;
-                            model.F_CustomerIndustry = customerindustry;
-                            model.F_Telephone = mobile;
+                            if (!string.IsNullOrEmpty(name))
+                                model.F_CustomerName = name;
+                            if (!string.IsNullOrEmpty(province))
+                                model.F_Province = province;
+                            if (!string.IsNullOrEmpty(customerindustry))
+                                model.F_CustomerIndustry = customerindustry;
+                            if (!string.IsNullOrEmpty(mobile))
+                                model.F_Telephone = mobile;
                             if (bll.Update(model))
                             {
                                 return Success("修改成功！", model.F_CustomerId);