Javascript grid.getView（）.refreshNode（）：未定义视图

我正在处理现有代码，收到错误信息：

未捕获引用错误：未定义视图

在这一行：

grid.getView().refreshNode(store.indexOfId(record.data.UserId));

谁能告诉我哪里可能有错误，我如何解决它？ 我想要的是只更新网格的记录，而不是整个网格

更多信息：

网格定义：

<ext:GridPanel runat="server" ID="UsersGridPannel2" AutoScroll="true" Width="1610" Height="550" EmptyText="No Users" >
                <Bin> 
                    <ext:Store runat="server" ID="storeUsersRoles" OnReadData="storeUsersRoles_ReadData">
                        <Model>
                            <ext:Model runat="server" IDProperty="RoleId" ID="UsersRoleModel1">
                                <Fields>
                                    <ext:ModelField Name="ApplicationId" />
                                    <ext:ModelField Name="RoleId" />
                                    <ext:ModelField Name="RoleName" />
                                </Fields>
                            </ext:Model>
                        </Model>
                    </ext:Store>
                    <ext:Store runat="server" ID="storeUsersSites" OnReadData="storeUsersSites_ReadData">
                        <Model>
                            <ext:Model runat="server" IDProperty="Siteid" ID="UsersSitesModel1">
                                <Fields>
                                    <ext:ModelField Name="Siteid" Type="Int" />
                                    <ext:ModelField Name="CTid" Type="Int" />
                                    <ext:ModelField Name="InstitutionId" Type="Int" />
                                    <ext:ModelField Name="clientid" Type="Int" />
                                    <ext:ModelField Name="Type" />
                                    <ext:ModelField Name="FullName" />
                                    <ext:ModelField Name="FullSiteName" />
                                </Fields>
                            </ext:Model>
                        </Model>
                    </ext:Store>
                </Bin>
.....

.....

我们需要更多的信息来提供帮助-这条线是从哪里来的？变量

网格在哪里定义？在被定义到这行之间，它还发生了什么？@Theo新的信息足够了吗？
<ext:GridPanel runat="server" ID="UsersGridPannel2" AutoScroll="true" Width="1610" Height="550" EmptyText="No Users" >
                <Bin> 
                    <ext:Store runat="server" ID="storeUsersRoles" OnReadData="storeUsersRoles_ReadData">
                        <Model>
                            <ext:Model runat="server" IDProperty="RoleId" ID="UsersRoleModel1">
                                <Fields>
                                    <ext:ModelField Name="ApplicationId" />
                                    <ext:ModelField Name="RoleId" />
                                    <ext:ModelField Name="RoleName" />
                                </Fields>
                            </ext:Model>
                        </Model>
                    </ext:Store>
                    <ext:Store runat="server" ID="storeUsersSites" OnReadData="storeUsersSites_ReadData">
                        <Model>
                            <ext:Model runat="server" IDProperty="Siteid" ID="UsersSitesModel1">
                                <Fields>
                                    <ext:ModelField Name="Siteid" Type="Int" />
                                    <ext:ModelField Name="CTid" Type="Int" />
                                    <ext:ModelField Name="InstitutionId" Type="Int" />
                                    <ext:ModelField Name="clientid" Type="Int" />
                                    <ext:ModelField Name="Type" />
                                    <ext:ModelField Name="FullName" />
                                    <ext:ModelField Name="FullSiteName" />
                                </Fields>
                            </ext:Model>
                        </Model>
                    </ext:Store>
                </Bin>
.....