<ext:TreePanel   Shadow="None" UseArrows="true"  AutoScroll="true"  Layout ="fit"   RootVisible="false"  runat="server" Icon="Accept" ID="gnmk" AnchorHorizontal="100%" AnchorVertical ="-80">
                                     
                                      <TopBar >
                                        <ext:Toolbar runat="server">
                                            <Items >
                                                <ext:Button runat="server" ID="qxbc" Text ="保存修改" Icon="Disk" >
                                               
                                                   <DirectEvents >
                                                        <Click  OnEvent ="bcjsqx">
                                                            <EventMask  ShowMask ="true" CustomTarget ="gnmk" />
                                                            <ExtraParams >
                                                                <ext:Parameter Name="checks" Value ="#{gnmk}.getChecked('id')" Mode ="Raw"   Encode ="true"     ></ext:Parameter>
                                                                <ext:Parameter Name ="jsbh" Value ="#{qxjsbhtxt}.getValue()" Mode ="Raw"></ext:Parameter>
                                                            </ExtraParams>
                                                        </Click>
                                                   </DirectEvents>
                                                   
                                                   
                                                </ext:Button>
                                            </Items>
                                        </ext:Toolbar>
                                      </TopBar>
when i check a treenode and click the "qxbc" button then fire a error "After passing a value an unexpected character was encountered: [. Line 1, position 2"

i find the json.cs Deserialize mothd Parameter value start with ",[" sometimes it's end with "],,,"