private static object?GetCellItem(this DataGridColumn column, object?item)
{
if (column is null || item is null)
{
return(null);
}
var descriptor = (PropertyDescriptor)column.GetValue(PropertyDescriptorProperty);
if (descriptor != null)
{
return(descriptor.GetValue(item));
}
var binding = column switch
{
DataGridBoundColumn c => c.Binding as Binding,
CellTemplateColumn c => c.Binding as Binding,
_ => null,
};
if (binding is null)
{
return(null);
}
descriptor = TypeDescriptor.GetProperties(item)
.OfType <PropertyDescriptor>()
.SingleOrDefault(x => x.Name == binding.Path.Path);
column.SetCurrentValue(PropertyDescriptorProperty, descriptor);
return(descriptor?.GetValue(item));
}
private static void SetCellTemplateProperty(DataGrid dataGrid, DependencyPropertyChangedEventArgs e, bool editingTemplate)
{
if (e.OldValue != null && e.NewValue == null)
{
for (var i = 0; i < dataGrid.Columns.Count; ++i)
{
if (dataGrid.Columns[i] is CellTemplateColumn col)
{
var temp = editingTemplate ?
col.GetValue(DataGridTemplateColumn.CellTemplateProperty) :
col.GetValue(DataGridTemplateColumn.CellEditingTemplateProperty);
if (temp == null)
{
var tcol = new DataGridTextColumn {
Binding = col.Binding
};
dataGrid.Columns[i] = tcol;
}
else
{
SetCellTemplateProperty(dataGrid, (DataTemplate)e.NewValue, editingTemplate);
}
}
}
}
else if (e.OldValue == null && e.NewValue != null)
{
for (var i = 0; i < dataGrid.Columns.Count; ++i)
{
if (dataGrid.Columns[i] is DataGridTextColumn tcol)
{
var col = new CellTemplateColumn {
Binding = tcol.Binding
};
if (!editingTemplate)
{
col.CellTemplate = (DataTemplate)e.NewValue;
}
else
{
col.CellEditingTemplate = (DataTemplate)e.NewValue;
}
dataGrid.Columns[i] = col;
}
}
}
else
{
SetCellTemplateProperty(dataGrid, (DataTemplate)e.NewValue, editingTemplate);
}
}
private static void OnDataGridAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
var col = new CellTemplateColumn
{
CellTemplate = ((DataGrid)sender).GetTemplate(),
CellEditingTemplate = ((DataGrid)sender).GetEditingTemplate(),
CellTemplateSelector = ((DataGrid)sender).GetTemplateSelector(),
CellEditingTemplateSelector = ((DataGrid)sender).GetEditingTemplateSelector(),
};
if ((e.Column as DataGridTextColumn)?.Binding is BindingBase binding)
{
col.Binding = binding;
e.Column = col;
}
}
private static void OnDataGridAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
var col = new CellTemplateColumn
{
CellTemplate = ((DataGrid)sender).GetTemplate(),
CellEditingTemplate = ((DataGrid)sender).GetEditingTemplate(),
CellTemplateSelector = ((DataGrid)sender).GetTemplateSelector(),
CellEditingTemplateSelector = ((DataGrid)sender).GetEditingTemplateSelector()
};
DataGridTextColumn tc = e.Column as DataGridTextColumn;
if (tc?.Binding != null)
{
col.Binding = tc.Binding;
e.Column = col;
}
}
private static void OnDataGridAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
var col = new CellTemplateColumn
{
CellTemplate = ((DataGrid)sender).GetTemplate(),
CellEditingTemplate = ((DataGrid)sender).GetEditingTemplate(),
CellTemplateSelector = ((DataGrid)sender).GetTemplateSelector(),
CellEditingTemplateSelector = ((DataGrid)sender).GetEditingTemplateSelector()
};
DataGridTextColumn tc = e.Column as DataGridTextColumn;
if (tc?.Binding != null)
{
col.Binding = tc.Binding;
e.Column = col;
}
}
private static void SetCellTemplateProperty(DataGrid dataGrid, DependencyPropertyChangedEventArgs e, bool editingtemplate)
{
if (e.OldValue != null && e.NewValue == null)
{
for (int i = 0; i < dataGrid.Columns.Count; ++i)
{
var col = dataGrid.Columns[i] as CellTemplateColumn;
if (col != null)
{
var temp = editingtemplate ?
col.GetValue(DataGridTemplateColumn.CellTemplateProperty) :
col.GetValue(DataGridTemplateColumn.CellEditingTemplateProperty);
if (temp == null)
{
var tcol = new DataGridTextColumn();
tcol.Binding = col.Binding;
dataGrid.Columns[i] = tcol;
}
else
{
SetCellTemplateProperty(dataGrid, (DataTemplate)e.NewValue, editingtemplate);
}
}
}
}
else if (e.OldValue == null && e.NewValue != null)
{
for (int i = 0; i < dataGrid.Columns.Count; ++i)
{
var tcol = dataGrid.Columns[i] as DataGridTextColumn;
if (tcol != null)
{
var col = new CellTemplateColumn();
col.Binding = tcol.Binding;
if (!editingtemplate)
{
col.CellTemplate = (DataTemplate)e.NewValue;
}
else
{
col.CellEditingTemplate = (DataTemplate)e.NewValue;
}
dataGrid.Columns[i] = col;
}
}
}
else
{
SetCellTemplateProperty(dataGrid, (DataTemplate)e.NewValue, editingtemplate);
}
}