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Selecting Children for Heirarchical view from a Generic Collection

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Grid

This is a migrated thread and some comments may be shown as answers.

Mark asked on 15 Jun 2011, 01:58 PM

Hi,

I'm sure you have addressed this somewhere before, but I could not find it.

I am assigning a generic collection as the DataSource of a RadGrid control. The Items in the collection have one member which is also a generic collection which provide the children.

For Example:

public class WorkOrderDetails

{

protected readonly IWorkOrder _workOrder;

protected readonly List<ResourceRequirement> _resources = new List<ResourceRequirement>();

public WorkOrderDetails(IWorkOrder wo)

{

_workOrder = wo;

foreach (IWoResources res in wo.ResourcesChildren)

{

_resources.Add(new ResourceRequirement(res));

}

public string WoNumber { get { return _workOrder.WoNumber; } }

public string Title

{

get { return _workOrder.Description; }

}

public List<ResourceRequirement> Resources

{

get { return _resources; }

}

public class ResourceRequirement

{

private IResources _data;

public ResourceRequirement(IResources res)

{

_data = res;

}



      //

      // Summary

      //    The Unique ID of this ResourceRequiment (which is a "Skill").

      public string ID { get { return _data.ResourceId; } }

//

// Summary:

// The property for the planned_hours column of the TabWare database wo_resources

// table.

public decimal PlannedHours { get { return _data.PlannedHours; } }

//

// Summary:

// The property for the remaining_hours column of the TabWare database wo_resources

// table.

public decimal RemainingHours { get { return _data.RemainingHours; } }

//

// Summary:

// The property for the workers column of the TabWare database wo_resources

// table.

public int Workers { get { return _data.Workers; } }

}

The assignment looks something like this:

List<WorkOrderDetails> list = factory.GetWorkOrders();

RadGrid1.DataSource = list;

My goal is to display the Work Orders with the ResourceRequirement children grouped under each WorkOrderDetail line.
For Example:

WoNumber    Title
000010202    Repair light fixture
      ID             Planned Hrs           Remaining Hrs            Workers
      Electician      8.0                         8.0                            1
      Welder          8.0                         8.0                            1

I figured out how to get the headers defined, but I currently have no content showing up for the child rows. Here is my markup:

<telerik:RadGrid

ID="rgPlannedWorkOrders" runat="server"

Width="480px" Height="392px"

AutoGenerateColumns="False" AllowSorting="True"

Skin="Sunset" GridLines="Vertical" CellSpacing="0"

AutoGenerateHierarchy="true">

<ClientSettings>

<Selecting AllowRowSelect="True" />

</ClientSettings>

<MasterTableView Width="100%"

HierarchyDefaultExpanded="True" HierarchyLoadMode="ServerBind">

<Columns>

<telerik:GridBoundColumn DataField="WoNumber"

FilterControlAltText="Filter WoNumber column" HeaderText="WoNumber"

ReadOnly="True" SortExpression="WoNumber" UniqueName="WoNumber">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="Title"

FilterControlAltText="Filter Title column" HeaderText="Title" ReadOnly="True"

SortExpression="Title" UniqueName="Title">

</telerik:GridBoundColumn>

</Columns>

<DetailTables>

<telerik:GridTableView Name="SubLevel1" ShowHeadersWhenNoRecords="false" AutoGenerateColumns="false">

<%-- This level holds items of Type2 --%>

<Columns>

<telerik:GridBoundColumn DataField="ID"

FilterControlAltText="Filter ID column" HeaderText="ID"

ReadOnly="True" SortExpression="ResourceId" UniqueName="ID">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="PlannedHours" DataType="System.Decimal"

FilterControlAltText="Filter PlannedHours column" HeaderText="Planned Hrs" ReadOnly="True"

SortExpression="PlannedHours" UniqueName="PlannedHours">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="RemainingHours" DataType="System.Decimal"

FilterControlAltText="Filter RemainingHours column" HeaderText="Remaining Hrs"

ReadOnly="True" SortExpression="RemainingHours" UniqueName="RemainingHours">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="Workers" DataType="System.Int32"

FilterControlAltText="Filter Workers column"

HeaderText="# Workers" ReadOnly="True" SortExpression="Workers"

UniqueName="Workers">

</telerik:GridBoundColumn>

</Columns>

</telerik:GridTableView>

</DetailTables>

<EditFormSettings>

<EditColumn FilterControlAltText="Filter EditCommandColumn column"></EditColumn>

</EditFormSettings>

<GroupHeaderItemStyle Height="32px" />

<RowIndicatorColumn FilterControlAltText="Filter RowIndicator column"></RowIndicatorColumn>

<ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column"></ExpandCollapseColumn>

</MasterTableView>

<GroupingSettings GroupContinuesFormatString="" GroupContinuedFormatString=""></GroupingSettings>

<FilterMenu EnableImageSprites="False"></FilterMenu>

<HeaderContextMenu CssClass="GridContextMenu GridContextMenu_Sunset"></HeaderContextMenu>

</telerik:RadGrid>

So, my question is: how do I tell the control to use the "Resources" property of the WorkOrderDetails item to fill the content of the second level of the heirarchy?

1 Answer, 1 is accepted

answered on 20 Jun 2011, 08:57 AM

Hi Mark,

First you should specify the relationship between the master and the detail tables as in normal hierarchy - Hierarchical declarative relations (using the ParentTableRelationship property of the grid). Then in order to address the subobject of the inner collection you can use a standard dot(.) syntax as shown in this help topic and live demo.

Best wishes,
Marin
the Telerik team

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