<Grid x:Name="LayoutRoot" Background="White" Loaded="LayoutRoot_Loaded">
　<Grid.RowDefinitions>
　　<RowDefinition Height="20"/>
　　<RowDefinition Height="30"/>
　　<RowDefinition Height="*"/>
　</Grid.RowDefinitions>
　<Button Name="btnAdd" Content="セル[60,0]値を設定するにはクリックします" Click="btnSetCellValue_Click" Grid.Row="1" Width="300"/>
　<c1:C1DataGrid Name="c1DataGrid" ItemsSource="{Binding}" AutoGenerateColumns="True" Grid.Row="2" CanUserEditRows="True" VerticalScrollBarVisibility="Auto">
　　<c1:C1DataGrid.Columns>
　　　<c1:DataGridTextColumn Header="Location" />
　　</c1:C1DataGrid.Columns>
　</c1:C1DataGrid>
</Grid>

Imports C1.WPF
Imports C1.WPF.DataGrid
Imports System
Imports System.Windows.Controls

Partial Public Class KB81014
　Inherits UserControl

　Private unboundCollection As New System.Collections.Generic.Dictionary(Of Integer, String)()

　Private unBoundCellValue As String
　Private unboundFlagUpdateValue As Boolean
　Private names As New System.Collections.ObjectModel.ObservableCollection(Of myNames)()

　Public Sub New()
　　InitializeComponent()

　　For index As Integer = 0 To 99
　　　names.Add(New myNames() With { _
　　　　.Name = "Name" & index.ToString() _
　　　})
　　Next
　　Me.DataContext = names

　End Sub

　Private Sub LayoutRoot_Loaded(sender As Object, e As System.Windows.RoutedEventArgs)
　　' アンバウンド列に対してダミーのバインディングを設定します。
　　Dim column As C1.WPF.DataGrid.DataGridTextColumn = TryCast(Me.c1DataGrid.Columns(0), C1.WPF.DataGrid.DataGridTextColumn)
　　If column IsNot Nothing Then
　　　column.Binding = New System.Windows.Data.Binding() With { _
　　　　.Path = New System.Windows.PropertyPath("[Temp]"), _
　　　　.Mode = System.Windows.Data.BindingMode.OneTime _
　　　}
　　　column.Tag = "tempBinding"
　　End If

　　' セルプレゼンタが読み込まれたときにアンバウンドセルの表示内容を更新します。
　　AddHandler Me.c1DataGrid.LoadedCellPresenter, AddressOf c1DataGrid_LoadedCellPresenter

　　' アンバウンドセルの編集をサポートする場合は、以下のイベントも処理します。
　　AddHandler Me.c1DataGrid.BeginningEdit, AddressOf c1DataGrid_BeginningEdit
　　AddHandler Me.c1DataGrid.BeganEdit, AddressOf c1DataGrid_BeganEdit
　　AddHandler Me.c1DataGrid.CancelingEdit, AddressOf c1DataGrid_CancelingEdit
　　AddHandler Me.c1DataGrid.CommittingEdit, AddressOf c1DataGrid_CommittingEdit
　　AddHandler Me.c1DataGrid.CommittedEdit, AddressOf c1DataGrid_CommittedEdit
　End Sub

　Private Sub c1DataGrid_CancelingEdit(sender As Object, e As DataGridEndingEditEventArgs)
　　Me.c1DataGrid.Refresh(True, False, True, False, False)
　End Sub

　Private Sub c1DataGrid_BeginningEdit(sender As Object, e As C1.WPF.DataGrid.DataGridBeginningEditEventArgs)
　　If e.Column.Tag IsNot Nothing Then
　　　If Me.unboundCollection.ContainsKey(e.Row.Index) Then
　　　　unBoundCellValue = Me.unboundCollection(e.Row.Index)
　　　End If
　　End If
　End Sub

　Private Sub c1DataGrid_BeganEdit(sender As Object, e As DataGridBeganEditEventArgs)
　　If e.Column.Tag IsNot Nothing Then
　　　Dim editor As C1TextBoxBase = TryCast(e.EditingElement, C1TextBoxBase)
　　　If editor IsNot Nothing Then
　　　　If Me.unboundCollection.ContainsKey(e.Row.Index) Then
　　　　　editor.C1Text = Me.unboundCollection(e.Row.Index)
　　　　Else
　　　　　editor.C1Text = String.Empty
　　　　End If
　　　End If
　　End If
　End Sub

　Private Sub c1DataGrid_CommittingEdit(sender As Object, e As DataGridEndingEditEventArgs)
　　If e.Column.Tag IsNot Nothing Then
　　　If e.Row.DataItem IsNot Nothing Then
　　　　unboundFlagUpdateValue = True
　　　　unBoundCellValue = DirectCast(e.EditingElement, C1TextBoxBase).C1Text
　　　End If
　　End If
　End Sub

　Private Sub c1DataGrid_CommittedEdit(sender As Object, e As DataGridCellEventArgs)
　　If unboundFlagUpdateValue Then
　　　TryCast(e.Cell.Presenter.Content, TextBlock).Text = unBoundCellValue
　　　Me.unboundCollection(e.Cell.Row.Index) = unBoundCellValue
　　End If

　　unboundFlagUpdateValue = False
　　unBoundCellValue = Nothing
　End Sub

　Private Sub c1DataGrid_LoadedCellPresenter(sender As Object, e As DataGridCellEventArgs)
　　If e.Cell.Column.Tag IsNot Nothing Then
　　　If Me.unboundCollection.ContainsKey(e.Cell.Row.Index) Then
　　　　Dim textBlock As TextBlock = TryCast(e.Cell.Presenter.Content, TextBlock)
　　　　If textBlock IsNot Nothing Then
　　　　　textBlock.Text = Me.unboundCollection(e.Cell.Row.Index)
　　　　End If
　　　End If
　　End If
　End Sub

　Private Sub btnSetCellValue_Click(sender As Object, e As System.Windows.RoutedEventArgs)
　　Me.unboundCollection(60) = "セル[60, 0]に値が追加されました。"
　　Me.c1DataGrid.Refresh(True, False, True, False, False)
　End Sub
End Class

Public Class myNames
　Public Property Name() As String
　　Get
　　　Return m_Name
　　End Get
　　Set(value As String)
　　　m_Name = value
　　End Set
　End Property
　Private m_Name As String
End Class

using C1.WPF;
using C1.WPF.DataGrid;
using System;
using System.Windows.Controls;

public partial class KB81014 : UserControl
{
　System.Collections.Generic.Dictionary unboundCollection = new System.Collections.Generic.Dictionary();

　string unBoundCellValue;
　bool unboundFlagUpdateValue;
　System.Collections.ObjectModel.ObservableCollection names = new System.Collections.ObjectModel.ObservableCollection();

　public KB81014()
　{
　　InitializeComponent();

　　for (int index = 0; index < 100; index++)
　　　names.Add(new myNames() { Name = "Name" + index.ToString() });
　　this.DataContext = names;
　}

　private void LayoutRoot_Loaded(object sender, System.Windows.RoutedEventArgs e)
　{
　　// アンバウンド列に対してダミーのバインディングを設定します。
　　C1.WPF.DataGrid.DataGridTextColumn column = this.c1DataGrid.Columns[0] as C1.WPF.DataGrid.DataGridTextColumn;
　　if (column != null)
　　{
　　　column.Binding = new System.Windows.Data.Binding() { Path = new System.Windows.PropertyPath("[Temp]"), Mode = System.Windows.Data.BindingMode.OneTime };
　　　column.Tag = "tempBinding";
　　}

　　// セルプレゼンタが読み込まれたときにアンバウンドセルの表示内容を更新します。
　　this.c1DataGrid.LoadedCellPresenter += c1DataGrid_LoadedCellPresenter;

　　// アンバウンドセルの編集をサポートする場合は、以下のイベントも処理します。
　　this.c1DataGrid.BeginningEdit += c1DataGrid_BeginningEdit;
　　this.c1DataGrid.BeganEdit += c1DataGrid_BeganEdit;
　　this.c1DataGrid.CancelingEdit += c1DataGrid_CancelingEdit;
　　 this.c1DataGrid.CommittingEdit += c1DataGrid_CommittingEdit;
　　this.c1DataGrid.CommittedEdit += c1DataGrid_CommittedEdit;
　}

　void c1DataGrid_CancelingEdit(object sender, DataGridEndingEditEventArgs e)
　{
　　this.c1DataGrid.Refresh(true, false, true, false, false);
　}

　void c1DataGrid_BeginningEdit(object sender, C1.WPF.DataGrid.DataGridBeginningEditEventArgs e)
　{
　　if (e.Column.Tag != null)
　　{
　　　if (this.unboundCollection.ContainsKey(e.Row.Index))
　　　　unBoundCellValue = this.unboundCollection[e.Row.Index];
　　}
　}

　void c1DataGrid_BeganEdit(object sender, DataGridBeganEditEventArgs e)
　{
　　if (e.Column.Tag != null)
　　{
　　　C1TextBoxBase editor = e.EditingElement as C1TextBoxBase;
　　　if (editor != null)
　　　{
　　　　if (this.unboundCollection.ContainsKey(e.Row.Index))
　　　　　editor.C1Text = this.unboundCollection[e.Row.Index];
　　　　else
　　　　　editor.C1Text = string.Empty;
　　　}
　　}
　}

　void c1DataGrid_CommittingEdit(object sender, DataGridEndingEditEventArgs e)
　{
　　if (e.Column.Tag != null)
　　{
　　　if (e.Row.DataItem != null)
　　　{
　　　　unboundFlagUpdateValue = true;
　　　　unBoundCellValue = ((C1TextBoxBase)(e.EditingElement)).C1Text;
　　　}
　　}
　}

　void c1DataGrid_CommittedEdit(object sender, DataGridCellEventArgs e)
　{
　　if (unboundFlagUpdateValue)
　　{
　　　(e.Cell.Presenter.Content as TextBlock).Text = unBoundCellValue;
　　　this.unboundCollection[e.Cell.Row.Index] = unBoundCellValue;
　　}

　　unboundFlagUpdateValue = false;
　　unBoundCellValue = null;
　}

　void c1DataGrid_LoadedCellPresenter(object sender, DataGridCellEventArgs e)
　{
　　if (e.Cell.Column.Tag != null)
　　{
　　　if (this.unboundCollection.ContainsKey(e.Cell.Row.Index))
　　　{
　　　　TextBlock textBlock = e.Cell.Presenter.Content as TextBlock;
　　　　if (textBlock != null)
　　　　　textBlock.Text = this.unboundCollection[e.Cell.Row.Index];
　　　}
　　}
　}

　private void btnSetCellValue_Click(object sender, System.Windows.RoutedEventArgs e)
　{
　　this.unboundCollection[60] = "セル[60, 0]に値が追加されました。";
　　this.c1DataGrid.Refresh(true, false, true, false, false);
　}
}

public class myNames
{
　public string Name { get; set; }
}