我有一个.Net 3.5应用程序,它有一个简单的表单视图和一个对象数据源。
<asp:ObjectDataSource ID="odsDevice" runat="server" SelectMethod="GetDeviceByDeviceNumber" EnableViewState="True"
UpdateMethod="updateDevice" DataObjectTypeName="GPSO.Repository.Device" TypeName="GPSOnline.ATOMWebService">
<SelectParameters>
<asp:SessionParameter DbType="Guid" Name="deviceid" SessionField="deviceid" />
</SelectParameters>
,这是表单视图
<asp:FormView ID="fvDevices" runat="server" DataSourceID="odsDevice">
<EditItemTemplate>
<table cellpadding="0" cellspacing="0" class="AdminContent">
<tr>
<td class="Content">
<h1>
Device Details</h1>
<hr />
<table class="AdminDetails" cellpadding="0" cellspacing="0">
<tr>
<th>
Atom Serial #
</th>
<td class="control">
<asp:TextBox ID="txtDeviceNumber" runat="server" Text='<%#Bind("DeviceNumber")%>' />
</td>
</tr>
<tr>
<th>
</th>
<td class="control">
<asp:RequiredFieldValidator ID="rfvDeviceNumber" runat="server" ToolTip="Must specify Device Number"
Display="Dynamic" ErrorMessage="Device Number is Required" EnableClientScript="false"
ControlToValidate="txtDeviceNumber"></asp:RequiredFieldValidator>
<asp:RegularExpressionValidator ID="revDeviceAddId" runat="server" ToolTip="Device ID must be an Integer."
ValidationExpression="[0-9]{1,6}" Display="Dynamic" ErrorMessage="Device ID must be an Number, less then 1000000."
EnableClientScript="false" ControlToValidate="txtDeviceNumber"></asp:RegularExpressionValidator>
<asp:CustomValidator ID="cvDeviceAddId" runat="server" ErrorMessage="Device ID already Exists."
Display="Dynamic" ToolTip="Device ID already Exists." ControlToValidate="txtDeviceNumber"
OnServerValidate="CheckDeviceDoesNotExist"></asp:CustomValidator>
</td>
</tr>
<tr>
<th>
</th>
<td class="control">
<asp:Label runat="server" ForeColor="Red" ID="lblFeedback" Text="" />
</td>
</tr>
<tr>
<th>
</th>
<td class="control">
</td>
</tr>
<tr>
<th>
</th>
<td class="control">
<asp:Button runat="server" ID="btnUpdate" Text="Update" CausesValidation="true" CommandName="Update"
Width="160px" />
</td>
</tr>
</table>
</td>
</tr>
</table>
</EditItemTemplate>
这里是对象数据源方法的代码。
[OperationContract]
[WebGet]
public void updateDevice(Device device)
{
DeviceRep.updateDevice(device);
}
[OperationContract]
[WebGet]
public Device GetDeviceByDeviceNumber(Guid deviceid)
{
return DeviceRep.GetDeviceByDeviceNumber(deviceid);}
现在业务对象包含了我对更新不感兴趣的字段,我只想更新设备号。
但是我遇到的问题是我作为参数进入“public void updateDevice(Device device)”方法的设备对象没有正在更新的对象的ID。这使得无法知道存储库中的哪条记录要更新。
是否有办法保留设备的ID,以便在更新时将其对象的一部分保留下来?
答案 0 :(得分:2)
不确定,但您必须将DataKeyNames
的{{1}}属性设置为
FormView