修改bug

codegit/CallCenterApi/CallCenterApi.Interface/CallCenterApi.Interface/Controllers/tel/CallInScreenController.cs

                     }
                     else
                     {
-                        BLL.T_Sys_TelTitleData numbBll = new BLL.T_Sys_TelTitleData();
-                        List<Model.T_Sys_TelTitleData> mobileModel = numbBll.GetModelList(" F_KeyPhoneNum='" + tel.Substring(0, 4) + "'");
-                        if (mobileModel == null || mobileModel.Count <= 0)
-                        {
-                            mobileModel = numbBll.GetModelList(" F_KeyPhoneNum='" + tel.Substring(0, 3) + "'");
-                        }
-                        if (mobileModel.Count > 0)
+                        if (tel.Trim().Length > 3)
                         {
-                            location = mobileModel[0].F_TitleName;
+                            BLL.T_Sys_TelTitleData numbBll = new BLL.T_Sys_TelTitleData();
+                            List<Model.T_Sys_TelTitleData> mobileModel = numbBll.GetModelList(" F_KeyPhoneNum='" + tel.Substring(0, 4) + "'");
+                            if (mobileModel == null || mobileModel.Count <= 0)
+                            {
+                                mobileModel = numbBll.GetModelList(" F_KeyPhoneNum='" + tel.Substring(0, 3) + "'");
+                            }
+                            if (mobileModel.Count > 0)
+                            {
+                                location = mobileModel[0].F_TitleName;
+                            }
                         }
                     }
                 }