Class TopLevelGroup

TopLevelGroup is the first-level of the Groups present in ICollectionViewAdv. It maintains the data structure for Grouping with ICollectionViewAdv. Iterate the DisplayElements property to get one-to-one mapping of the index with the TopLevelGroup items. Access all the Bottom-level and other nested level groups with the Groups property.

Inheritance

System.Object

NodeEntry

GroupEntry

Group

TopLevelGroup

Implements

System.IDisposable

System.Collections.Generic.IEnumerable<NodeEntry>

System.Collections.IEnumerable

IGroupRefresh

IGroupList

Inherited Members

Group.AddItem(Object)

Group.AddRecord(RecordEntry, Boolean)

Group.CreateDetailsForGroups(Int32)

Group.CreateDetailsForRecords(Group, IEnumerable, Int32)

Group.CreateDetailsForRecords(Group, Int32)

Group.CreateNewGroup(Group, GroupResult, Int32)

Group.CreateNewGroup(Group, Object, Int32)

Group.Details

Group.GetEnumerator()

Group.GetGroupsCount()

Group.GetParentYAmountCache()

Group.GetRecordAt(Int32)

Group.GetRecordCount()

Group.GetRecordIndex(Object)

Group.GetRecordIndex(RecordEntry)

Group.GetRelationsCount()

Group.GetSourceCount()

Group.GetSourceYAmountCache()

Group.GetSummaryValue(String)

Group.GetSummaryValue(String, String)

Group.GetYAmountCache()

Group.Groups

Group.InsertRecord(Int32, RecordEntry, Boolean)

Group.IsBottomLevel

Group.isDirty

Group.IsExpanded

Group.isSourceYAmountDirty

Group.ItemsCount

Group.Key

Group.OnGroupCollapsed()

Group.OnGroupExpanded()

Group.Parent

Group.Populate(IEnumerable<GroupResult>)

Group.Populate(IEnumerable<GroupResult>, List<Group>, Group, Int32)

Group.PropertyChanged

Group.RecalculateSourceYAmount()

Group.RecalculateYAmount()

Group.Records

Group.RemoveItem(Object)

Group.RemoveRecord(RecordEntry, Boolean)

Group.ResetSourceYAmount()

Group.ResetYAmount()

Group.SetDirty()

Group.Source

Group.SummaryDetails

Group.TopLevelGroup

GroupEntry.ToSummaryArray()

NodeEntry.Dispose()

NodeEntry.Finalize()

NodeEntry.IsGroups

NodeEntry.IsRecords

NodeEntry.Level

Namespace: Syncfusion.Maui.Data

Assembly: Syncfusion.Maui.Data.dll

Syntax

public class TopLevelGroup : Group, IDisposable, IEnumerable<NodeEntry>, IEnumerable, IGroupRefresh, IGroupList

Constructors

TopLevelGroup(CollectionViewAdv)

Initializes a new instance of the TopLevelGroup class.

Declaration

public TopLevelGroup(CollectionViewAdv collectionView)

Parameters

Type	Name	Description
CollectionViewAdv	collectionView	The underlying collection view of the group.

Properties

CollectionView

Gets the collection view of the group.

Declaration

public CollectionViewAdv CollectionView { get; }

Property Value

Type	Description
CollectionViewAdv	The collection view of the group.

DisplayElements

Gets the GroupDisplayElements which contains the group and record information of the top level group.

Declaration

public GroupDisplayElements DisplayElements { get; }

Property Value

Type	Description
GroupDisplayElements	The GroupDisplayElements which contains the group and record information of the top level group.

Remarks

The group and record can accessed from display elements when the data is grouped.

GroupDescriptions

Gets the collection of group descriptions in the SfDataGrid.

Declaration

public ObservableCollection<ColumnGroupDescription> GroupDescriptions { get; }

Property Value

Type	Description
System.Collections.ObjectModel.ObservableCollection<ColumnGroupDescription>	The collection of group descriptions in the SfDataGrid.

IsTopLevelGroup

Gets a value indicating whether this instance is top level group. Top-Level Group will be the first-level group.

Declaration

public override bool IsTopLevelGroup { get; }

Property Value

Type	Description
System.Boolean	True if this instance is top level group, otherwise false.

Overrides

Group.IsTopLevelGroup

RelationsCount

Gets the relations count of the group, that link grid and allow navigation from parent grid to child grid.

Declaration

public virtual int RelationsCount { get; }

Property Value

Type	Description
System.Int32	The relations count of the group, that link grid and allow navigation from parent grid to child grid.

ResetCache

Gets or sets a boolean value indicating whether to reset the cache.

Declaration

public bool ResetCache { get; set; }

Property Value

Type	Description
System.Boolean	A boolean value indicating whether to reset the cache.

Methods

Add(Object, Boolean)

Adds the given record to the group.

Declaration

public void Add(object record, bool isInSourceCollectionChange)

Parameters

Type	Name	Description
System.Object	record	The record to be added to the group.
System.Boolean	isInSourceCollectionChange	A boolean value indicating whether the source collection change is currently in progress.

CalculateCaptionSummary(SummaryRecordEntry, String, Group)

Group Caption Summary calculated while SummaryCalculationMode is OnDemandCaptionSummary

Declaration

public void CalculateCaptionSummary(SummaryRecordEntry summaryEntry, string columnName, Group group)

Parameters

Type	Name	Description
SummaryRecordEntry	summaryEntry	Contains the summary details
System.String	columnName	Contains the column mapping name
Group	group	Contains group record of column

CalculateGroupSummary(SummaryRecordEntry, String, Group)

Calculate the summary for group when OnDemandGroupSummary is Enable

Declaration

public void CalculateGroupSummary(SummaryRecordEntry summaryRecordEntry, string columnName, Group group)

Parameters

Type	Name	Description
SummaryRecordEntry	summaryRecordEntry	Cotains the summary Details
System.String	columnName	Contains column name
Group	group	Contains the group Details

CollapseGroup(Group)

Collapses the given group in the top-level group.

Declaration

public virtual int CollapseGroup(Group group)

Parameters

Type	Name	Description
Group	group	The group to be collapsed.

Returns

Type	Description
System.Int32	Returns the value indicating the items count in the given group.

ComputeCount(Group, ref Int32)

Computes the number of items in the given group.

Declaration

public void ComputeCount(Group group, ref int itemCount)

Parameters

Type	Name	Description
Group	group	The group in which the items count is to be calculated.
System.Int32	itemCount	The number of items in the given group.

Contains(Object)

Determines whether the given record is found in the display elements of the TopLevelGroup.

Declaration

public bool Contains(object record)

Parameters

Type	Name	Description
System.Object	record	The record to be found.

Returns

Type	Description
System.Boolean	True if the specified record is found in the Top-level group, otherwise false.

DeferRefresh()

Gets a disposable defer helper to suspends the all data operations in view.

Declaration

protected IDisposable DeferRefresh()

Returns

Type	Description
System.IDisposable	Returns disposable defer helper to do the bulk changes.

Dispose(Boolean)

Releases unmanaged and optionally releases the managed resources.

Declaration

protected override void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing	True to release both managed and unmanaged resources; false to release only unmanaged resources.

Overrides

Group.Dispose(Boolean)

ExpandGroup(Group)

Expands the given group in the top-level group.

Declaration

public virtual int ExpandGroup(Group group)

Parameters

Type	Name	Description
Group	group	The group to be expanded.

Returns

Type	Description
System.Int32	Returns the value indicating the items count in the given group.

GetGroupCaptionText(Group, String, String)

Gets the group caption text for the specified Group.

Declaration

public virtual string GetGroupCaptionText(Group group, string groupSpecifierText, string columnHeaderName)

Parameters

Type	Name	Description
Group	group	The group for which the caption text is to be obtained.
System.String	groupSpecifierText	The specifier text of the group whose caption text is to be obtained.
System.String	columnHeaderName	The Column's Header Name

Returns

Type	Description
System.String	The group caption text for the specified Group.

GetGroupCaptionTextList(Group, String, String)

Gets the key-value pair of the group caption text list, which contains the text to be displayed in the summary for the specified Group.

Declaration

public KeyValuePair<string, List<string>> GetGroupCaptionTextList(Group group, string groupSpecifierText, string columnHeaderName)

Parameters

Type	Name	Description
Group	group	The group for which the caption text is to be obtained.
System.String	groupSpecifierText	The specifier text of the group whose caption text is to be obtained.
System.String	columnHeaderName	The Column's Header Name

Returns

Type	Description
System.Collections.Generic.KeyValuePair<System.String, System.Collections.Generic.List<System.String>>	The key-value pair of the group caption text list, which contains the text to be displayed in the summary for the specified Group.

GetMaxLevel()

Gets the maximum level of the group in the top-level group.

Declaration

public int GetMaxLevel()

Returns

Type	Description
System.Int32	The max level of the group in the top-level group.

GetUnderlyingSourceType()

Gets the source type of the underlying collection view of the top-level group.

Declaration

protected virtual Type GetUnderlyingSourceType()

Returns

Type	Description
System.Type	The source type of the underlying collection view of the top-level group.

IndexOf(Object)

Finds the index of the given record in the top-level group.

Declaration

public virtual int IndexOf(object record)

Parameters

Type	Name	Description
System.Object	record	The record whose index is to be obtained.

Returns

Type	Description
System.Int32	The index of the given record in the top-level group.

Insert(Object, Int32, Boolean)

Inserts the given record at the given index in the group.

Declaration

public void Insert(object record, int index, bool isInSourceCollectionChange)

Parameters

Type	Name	Description
System.Object	record	The record to be inserted.
System.Int32	index	The index at which the given record is to be inserted.
System.Boolean	isInSourceCollectionChange	A boolean value indicating whether the source collection change is currently in progress.

Invalidate(Int32, Int32)

Invalidates the group of the given index.

Declaration

public virtual void Invalidate(int index, int count)

Parameters

Type	Name	Description
System.Int32	index	The index of the group to be invalidated.
System.Int32	count	The count of the groups to be invalidated from the given index.

RefreshFilters()

Refreshes the filter of the group.

Declaration

protected void RefreshFilters()

RefreshSortingOrder()

Refreshes the sorting order of the group.

Declaration

protected void RefreshSortingOrder()

Remove(Object, Boolean)

Removes the given record from the group.

Declaration

public virtual int Remove(object record, bool isInSourceCollectionChange)

Parameters

Type	Name	Description
System.Object	record	The record to be removed.
System.Boolean	isInSourceCollectionChange	A boolean value indicating whether the source collection change is currently in progress.

Returns

Type	Description
System.Int32	A boolean value indicating whether the given record is removed.

ResumeEvents()

Resumes the events in the group, which resumes the view updates in the group.

Declaration

public void ResumeEvents()

SuspendEvents()

Suspends the events in the group, which suspends the view updates in the group.

Declaration

public void SuspendEvents()

UpdateCaptionSummaries()

Updates the caption summaries of the groups in the top-level group.

Declaration

public void UpdateCaptionSummaries()

UpdateSummaries(Group)

Updates the summaries for the specified Group in the top-level group.

Declaration

public void UpdateSummaries(Group group)

Parameters

Type	Name	Description
Group	group	The group for which the summaries is to be updated.

UpdateSummaries(String, Group)

Updates the summaries for the specified Group in the top-level group.

Declaration

public void UpdateSummaries(string PropertyName, Group group)

Parameters

Type	Name	Description
System.String	PropertyName
Group	group	The group for which the summaries is to be updated.

Explicit Interface Implementations

IGroupRefresh.DeferRefresh()

Gets a disposable defer helper to suspends the all data operations in view.

Declaration

IDisposable IGroupRefresh.DeferRefresh()

Returns

Type	Description
System.IDisposable	Returns disposable defer helper to do the bulk changes.

IGroupRefresh.RefreshFilters()

Refreshes the filters.

Declaration

void IGroupRefresh.RefreshFilters()

IGroupRefresh.RefreshSortingOrder()

Refreshes the sorting order.

Declaration

void IGroupRefresh.RefreshSortingOrder()

Implements

System.IDisposable

System.Collections.Generic.IEnumerable<>

System.Collections.IEnumerable

IGroupRefresh

IGroupList