C# 如何在ASPxGridView EditItemTemplate中绑定复选框

我正在使用DevExpress Asp.Net控件，在GridView EditTempalte中必须添加复选框，必须绑定复选框复选框，并使用数据库列属性取消选中，以及在新项目上插入默认值未选中

这是我的密码

<dx:ASPxGridView ID="ASPxGridView3" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource3" 
                 KeyFieldName="UniqueID" Theme="Default">
    <SettingsSearchPanel Visible="True" />
    <Columns>
        <dx:GridViewCommandColumn ShowDeleteButton="True" ShowEditButton="True" ShowInCustomizationForm="True" 
            ShowNewButtonInHeader="True" VisibleIndex="0">
        </dx:GridViewCommandColumn>
        <dx:GridViewDataTextColumn FieldName="UniqueID" ReadOnly="True" ShowInCustomizationForm="True" 
            Visible="False" VisibleIndex="1">
        </dx:GridViewDataTextColumn>
        <dx:GridViewDataTextColumn FieldName="ResourceID" ShowInCustomizationForm="True" Visible="False" 
            VisibleIndex="2" ReadOnly="True">
            <EditFormSettings Visible="False" />
        </dx:GridViewDataTextColumn>
        <dx:GridViewDataTextColumn FieldName="ResourceName" ShowInCustomizationForm="True" VisibleIndex="3">
        </dx:GridViewDataTextColumn>
        <dx:GridViewDataTextColumn FieldName="Color" ShowInCustomizationForm="True" Visible="False" VisibleIndex="4">
            <EditFormSettings Visible="False" />
        </dx:GridViewDataTextColumn>
        <dx:GridViewDataTextColumn FieldName="CustomField1" ShowInCustomizationForm="True" Visible="False" VisibleIndex="5">
            <EditFormSettings Visible="False" />
        </dx:GridViewDataTextColumn>
        <dx:GridViewDataTextColumn FieldName="category_ClientID" ShowInCustomizationForm="True" 
            VisibleIndex="6" Visible="False">
        </dx:GridViewDataTextColumn>
        <dx:GridViewDataTextColumn FieldName="IsAvailable" PropertiesTextEdit-NullDisplayText="true" 
            ShowInCustomizationForm="True" VisibleIndex="7">
            **<EditItemTemplate>
                <dx:ASPxCheckBox ID="chkIsAvailableEdit" runat="server" Checked="true" Style="margin-left: 18px"
                    CheckState="Checked" Cursor="pointer" EnableDefaultAppearance="False"
                    EnableTheming="False">
                    <CheckedImage Height="26px" Url="~/images/switchon.png" Width="70px">
                    </CheckedImage>
                    <UncheckedImage Height="26px" Url="~/images/switchoff.png" Width="70px">
                    </UncheckedImage>
                    <GrayedImage Url="~/images/switchoff.png">
                    </GrayedImage>
                </dx:ASPxCheckBox>
            </EditItemTemplate>**
        </dx:GridViewDataTextColumn>
    </Columns>
</dx:ASPxGridView>
<asp:SqlDataSource ID="SqlDataSource3" runat="server" ConnectionString="<%$ ConnectionStrings:NCompassWebsiteConnectionString %>" 
    DeleteCommand="DELETE FROM [SchResources] WHERE [UniqueID] = @UniqueID" 
    InsertCommand="INSERT INTO [SchResources] ([ResourceID], [ResourceName], [Color], [CustomField1], [category_ClientID], 
            [IsAvailable]) VALUES (@ResourceID, @ResourceName, @Color, @CustomField1, @category_ClientID, @IsAvailable)" 
    SelectCommand="SELECT * FROM [SchResources] WHERE ([category_ClientID] = @category_ClientID)" 
    UpdateCommand="UPDATE [SchResources] SET [ResourceID] = @ResourceID, [ResourceName] = @ResourceName, [Color] = @Color, 
            [CustomField1] = @CustomField1, [category_ClientID] = @category_ClientID, [IsAvailable] = @IsAvailable WHERE [UniqueID] = @UniqueID">
    <DeleteParameters>
        <asp:Parameter Name="UniqueID" Type="Int32" />
    </DeleteParameters>
    <InsertParameters>
        <asp:Parameter Name="ResourceID" Type="Int32" />
        <asp:Parameter Name="ResourceName" Type="String" />
        <asp:Parameter Name="Color" Type="Int32" />

        <asp:Parameter Name="CustomField1" Type="String" />
        <asp:SessionParameter Name="category_ClientID" SessionField="ClientID" Type="String" />
        <asp:Parameter Name="IsAvailable" Type="String" />
    </InsertParameters>
    <SelectParameters>
        <asp:SessionParameter Name="category_ClientID" SessionField="ClientID" Type="String" />
        <%--<asp:Parameter DefaultValue="62" Name="category_ClientID" Type="String" />--%>
    </SelectParameters>
    <UpdateParameters>
        <asp:Parameter Name="ResourceID" Type="Int32" />
        <asp:Parameter Name="ResourceName" Type="String" />
        <asp:Parameter Name="Color" Type="Int32" />

        <asp:Parameter Name="CustomField1" Type="String" />
        <asp:SessionParameter Name="category_ClientID" SessionField="ClientID" Type="String" />
        <asp:Parameter Name="IsAvailable" Type="String" />
        <asp:Parameter Name="UniqueID" Type="Int32" />
    </UpdateParameters>
</asp:SqlDataSource>

**
**

只需使用内置的GridViewDataCheckColumn（专门用于显示/编辑布尔值），而不是GridViewDataTextColumn（默认）即可：

---

出现了什么错误？为什么不直接联系DevExpress支持部门？
<%--
<dx:GridViewDataTextColumn FieldName="IsAvailable">
</dx:GridViewDataTextColumn
--%>

<dx:GridViewDataCheckColumn FieldName="IsAvailable">
</dx:GridViewDataCheckColumn

<dx:GridViewDataTextColumn FieldName="IsAvailable">
    <EditItemTemplate>
        <dx:ASPxCheckBox ID="chkIsAvailableEdit" ... Value='<%#Bind("IsAvailable")'>
        </dx:ASPxCheckBox>
    </EditItemTemplate>
</dx:GridViewDataTextColumn>