Silverlight SL4 | DomainDataSource/DataGrid |添加空行以插入新项

我正在尝试将DataForm和DataGrid绑定到DomainDataSource，并实现添加、删除和编辑项的功能

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

对于数据表单部分，一切都很好。但是如何使用DataGrid添加新记录呢？ 直到现在我才知道，有两种工作选择：

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

向数据视图添加一个新的“空白”项

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

• 问题：由于关键需求和约束，我得到了验证错误

使用Silverlight 4服务发布版（2010年9月）中的“SDK功能在DataGrid控件中启用添加新行功能”

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

• 问题：到底发生了什么变化？没有新成员或文档

以下是一些与我的项目最重要部分相匹配的基本标记声明：

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

不幸的是，我没时间了

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

---

提前感谢您的帮助。来自德国的问候。希望任何人都能帮忙；）

我只是在想类似的事情时遇到了这个问题。在这里发布，希望这能节省其他人的时间：

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

在“新记录”的代码隐藏中，单击按钮：

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

private void OnNewRecordClick(object sender, System.Windows.RoutedEventArgs e)
{ childDomainDataSource.DataView.Add(new Child()); }

---

DataGrid

会立即拾取新记录，您仍然可以在DDS上执行

SubmitChangesCommand

，将新条目发布回DB。

尽管它不能严格回答您的问题，但使用PagedCollectionView效果相当不错。此外，可以按Esc键取消插入的行

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

缺点是你必须做一点簿记

<Grid x:Name="LayoutRoot">
    <sdk:DataGrid x:Name="ParentGrid" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ParentForm" CommandButtonsVisibility="All" Grid.Row="1" ItemsSource="{Binding ElementName=parentDomainDataSource, Path=Data}"/>

    <sdk:DataGrid x:Name="ChildGrid" Grid.Column="1" AutoGenerateColumns="False" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>
    <toolkit:DataForm x:Name="ChildForm" CommandButtonsVisibility="All" ItemsSource="{Binding ElementName=childDomainDataSource, Path=Data}"/>

    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Child, CreateList=true}" Name="childDomainDataSource" QueryName="GetChildrenQuery"
                                  DomainContext="{StaticResource domainCtx}"/>
    </riaControls:DomainDataSource>
    <riaControls:DomainDataSource AutoLoad="True" d:DesignData="{d:DesignInstance my1:Parent, CreateList=true}" Name="parentDomainDataSource" QueryName="GetParentsQuery" 
                                  DomainContext="{StaticResource domainCtx}"/>
</Grid>

private DomainService1 ctx = new DomainService1();
private PagedCollectionView pcvPersons = null;
private List<Person> tmpList = null;

private void LoadData()
{
    ctx.Load(ctx.GetPersonsQuery(),
        (op) =>
        {
            tmpList = new List<Person>(ctx.Persons);
            pcvPersons = new PagedCollectionView(tmpList);
            dataGrid1.ItemsSource = pcvPersons;
        }, null);
}

private void AddButton_Click(object sender, RoutedEventArgs e)
{
    Web.Person newItem = pcvPersons.AddNew();
}

private DomainService1 ctx=new DomainService1（）；
private PagedCollectionView pcvPersons=null；
私有列表tmpList=null；
私有void LoadData（）
{
加载（ctx.GetPersonsQuery（），
（op）=>
{
tmpList=新名单（ctx.人）；
pcvPersons=新页面集合视图（tmpList）；
dataGrid1.ItemsSource=pcvPersons；
}，空）；
}
私有void AddButton_单击（对象发送方，路由目标）
{
Web.Person newItem=pcvPersons.AddNew（）；
}