WebDatagrid-checkbox行如何用js控制其是否可用

由于js不能控制WebDatagrid的可编辑不可编辑，只能用前台控制。当checkbox行需要设置有时可选有时不可选，如何用js解决。

需要先后台设置可编辑.Behaviors.EditingCore.enabled=true;

然后前台设置：

WebDatagrid.get_columns().get_columnFromKey("行key值")._editableCheckbox = false;

进行前台设置。

<Columns>
<ig:UnboundCheckBoxField Key="RemoveDocument" Header-Text="Rem" Width="30px"> </ig:UnboundCheckBoxField>
<ig:BoundDataField DataFieldName="DocumentDescription" Key="DocumentDescription" Header-Text="Document Description" Width="403px" ></ig:BoundDataField>
<ig:BoundDataField DataFieldName="LoanAppEnvelopeDocumentRecID" Key="LoanAppEnvelopeDocumentRecID" Hidden ="true"></ig:BoundDataField>
</Columns>
<Behaviors>
<ig:EditingCore>
<EditingClientEvents CellValueChanged="Grid_CellValueChanged" />
<Behaviors>
<ig:CellEditing>
<ColumnSettings>
<ig:EditingColumnSetting ColumnKey="RemoveDocument" ReadOnly="false" />
<ig:EditingColumnSetting ColumnKey="DocumentDescription" ReadOnly="true" />
</ColumnSettings>
</ig:CellEditing>
</Behaviors>
</ig:EditingCore>
<ig:Selection Enabled ="true"></ig:Selection>
<ig:Activation Enabled="true"></ig:Activation>
</Behaviors>

事件函数：

dgDocuments.get_columns().get_columnFromKey("HasSignerAssociatedWithDocument")._editableCheckbox = false;