Add Custom Control
public class BlankDataGrid : DataGrid
{
//Parent Data Grid
private static DataGrid PdataGrid;
//Blank Data Grid
private static DataGrid BdataGrid;
//how many row we will create
private static int NoRow = 4;
//if this value is 1 then no delete first recode,this is used for parent and child grid row color matching.
private static int RemoveFirstRow;
//Zero to null value converter into blank data grid.
private static ZeroToEmptyConverter converter = new ZeroToEmptyConverter();
//when paren data grid column hide then blank data grid column hide by this variable
private static bool isParenDGColumnHide;
//Constructor
public BlankDataGrid()
{
try
{
this.Loaded += new RoutedEventHandler(BlankDataGrid_Loaded);
this.LoadingRow += new System.EventHandler<DataGridRowEventArgs>(BlankDataGrid_LoadingRow);
}
catch (Exception)
{ throw; }
}
//when grid is loaded then it is called
private void BlankDataGrid_Loaded(object sender, RoutedEventArgs e)
{
//this.HeadersVisibility = DataGridHeadersVisibility.None;
this.AutoGenerateColumns = false;
this.VerticalScrollBarVisibility = ScrollBarVisibility.Hidden;
this.HorizontalScrollBarVisibility = ScrollBarVisibility.Hidden;
}
//when every row loaded then this method is called
private void BlankDataGrid_LoadingRow(object sender, DataGridRowEventArgs e)
{
try
{
int dgridrow = e.Row.GetIndex();
if (dgridrow == 0)
if (RemoveFirstRow == 1)
e.Row.Visibility = Visibility.Collapsed;
}
catch (Exception)
{ throw; }
}
#region Paren Data Grid Properties
public DataGrid ParentDataGrid
{
get { return (DataGrid)GetValue(ParentDataGridProperty); }
set { SetValue(ParentDataGridProperty, value); }
}
public static readonly DependencyProperty ParentDataGridProperty =
DependencyProperty.Register("ParentDataGrid", typeof(DataGrid), typeof(BlankDataGrid),
new PropertyMetadata(null, new PropertyChangedCallback(OnParentDataGridChanged)));
private static void OnParentDataGridChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
try
{
//clear parent grid temporary list
PdataGrid = null;
//get parent data grid
PdataGrid = ((BlankDataGrid)d).ParentDataGrid as DataGrid;
if (PdataGrid == null) return;
if (PdataGrid.ItemsSource == null) return;
//Parent Grid Sized Changed Event
PdataGrid.SizeChanged += new SizeChangedEventHandler(dataGrid_SizeChanged);
//Parent LayoutUpdated Event fire when parent grid column hide
PdataGrid.LayoutUpdated += new EventHandler(PdataGrid_LayoutUpdated);
//Get Parent Object Type
Type t;
if (PdataGrid.ItemsSource.GetType() == typeof(PagedCollectionView))
{
var pageCollectionData = PdataGrid.ItemsSource as PagedCollectionView;
t = (pageCollectionData.SourceCollection as IEnumerable).AsQueryable().ElementType;
}
else
{
t = (PdataGrid.ItemsSource as IEnumerable).AsQueryable().ElementType;
}
if (t == null) return;
//Make Blank Data List
dynamic instant = Activator.CreateInstance(t);//create instance
var Datalist = new ObservableCollection<dynamic>();
for (int i = 0; i < NoRow; i++)
Datalist.Add(instant);
//add item source
((BlankDataGrid)d).ItemsSource = null;
((BlankDataGrid)d).ItemsSource = Datalist;
//Clear data grid column
((BlankDataGrid)d).Columns.Clear();
foreach (var columnName in PdataGrid.Columns)
{
((BlankDataGrid)d).Columns.Add(CreateTextColumn("id"));
}
//adjust blank grid according to parent grid.
AdjustWidth(PdataGrid, ((BlankDataGrid)d));
//Clear blank grid teporary
BdataGrid = null;
//set as a further use
BdataGrid = ((BlankDataGrid)d);
}
catch (Exception)
{
throw;
}
}
//create blank data grid column
private static DataGridTextColumn CreateTextColumn(string fieldName)
{
DataGridTextColumn column = new DataGridTextColumn();
column.Binding = new Binding(fieldName);
column.Binding.Converter = converter;
column.Binding.Mode = BindingMode.OneWay;
return column;
}
//adjust blank grid according to parent grid.
private static void AdjustWidth(DataGrid paren, DataGrid blank)
{
for (int i = 0; i < blank.Columns.Count; i++)
{
for (int j = 0; j < PdataGrid.Columns.Count; j++)
{
if (i == j)
{
blank.Columns[i].Width = new DataGridLength(PdataGrid.Columns[j].ActualWidth);
blank.Columns[i].Visibility = PdataGrid.Columns[j].Visibility;
break;
}
}//end of second for
}//end of 1st for
}
//parent grid sized changed
private static void dataGrid_SizeChanged(object sender, SizeChangedEventArgs e)
{
try
{
if (sender == null) return;
if (BdataGrid == null) return;
isParenDGColumnHide = false;
var pGrid = sender as DataGrid;
AdjustWidth(pGrid, BdataGrid);
}
catch (Exception)
{ throw; }
}
//Parent Grid LayoutUpdated Event fire when parent grid column hide
private static void PdataGrid_LayoutUpdated(object sender, EventArgs e)
{
if (isParenDGColumnHide)
{
if (BdataGrid == null) return;
if (PdataGrid == null) return;
AdjustWidth(PdataGrid, BdataGrid);
isParenDGColumnHide = false;
}
}
#endregion
#region Properties
public int NumberOfRow
{
get { return (int)GetValue(NumberOfRowProperty); }
set { SetValue(NumberOfRowProperty, value); }
}
public static readonly DependencyProperty NumberOfRowProperty =
DependencyProperty.Register("NumberOfRow", typeof(int), typeof(BlankDataGrid),
new PropertyMetadata(0, new PropertyChangedCallback(NumberOfRowChanged)));
private static void NumberOfRowChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
try
{
if (d != null)
{
NoRow = 0;
NoRow = ((BlankDataGrid)d).NumberOfRow;
}
}
catch (Exception)
{ throw; }
}
public int isRemoveFirstRow
{
get { return (int)GetValue(isRemoveFirstRowProperty); }
set { SetValue(isRemoveFirstRowProperty, value); }
}
public static readonly DependencyProperty isRemoveFirstRowProperty =
DependencyProperty.Register("isRemoveFirstRow", typeof(int), typeof(BlankDataGrid),
new PropertyMetadata(0, new PropertyChangedCallback(isRemoveFirstRowChanged)));
private static void isRemoveFirstRowChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
try
{
if (d != null)
{
RemoveFirstRow = ((BlankDataGrid)d).isRemoveFirstRow;
}
}
catch (Exception)
{ throw; }
}
public bool isParenDataGridColumnHide
{
get { return (bool)GetValue(isParenDataGridColumnHideProperty); }
set { SetValue(isParenDataGridColumnHideProperty, value); }
}
public static readonly DependencyProperty isParenDataGridColumnHideProperty =
DependencyProperty.Register("isParenDataGridColumnHide", typeof(bool), typeof(BlankDataGrid),
new PropertyMetadata(false, new PropertyChangedCallback(isMainGridHideChanged)));
private static void isMainGridHideChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
try
{
if (d != null)
{
isParenDGColumnHide = ((BlankDataGrid)d).isParenDataGridColumnHide;
}
}
catch (Exception)
{ throw; }
}
#endregion
}
use of custom control in xaml
<lib:BlankDataGrid VerticalAlignment="Top" Grid.Row="1" Grid.Column="0" ParentDataGrid="{Binding ElementName=dgMasterGrid}"/>
<sdk:DataGrid x:Name="dgMasterGrid" Grid.Row="1" Grid.Column="0" VerticalAlignment="Top"/>
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