DataGrid預設是點一下為選取，點兩下為編輯，為了讓使用者在DataGrid上編輯時，有較好的使用體驗，必須改成點一下立刻可以編輯。
實現上述功能需要到DataGrid的DataGridCell的PreviewMouseLeftButtonDown事件內做處理，首先，在DataGrid的Xaml標籤內定義Style，
Xaml如下:
<DataGrid x:Name="dataGrid1" Margin="10,43,10.2,10.4" ItemsSource="{Binding}">
<DataGrid.Resources>
<Style TargetType="DataGridCell">
<EventSetter Event="PreviewMouseLeftButtonDown" Handler="DataGridCell_PreviewMouseLeftButtonDown"/>
</Style>
</DataGrid.Resources>
</DataGrid>
接著，在Code-Behind撰寫事件處理函示如下:
//事件處理函式
private void DataGridCell_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
PreviewMouseLeftButtonDownHandle((DataGridCell)sender, this.datagrid1);
}
private void PreviewMouseLeftButtonDownHandle(DataGridCell cell, DataGrid datagrid)
{
if (cell != null && !cell.IsEditing && !cell.IsReadOnly)
{
if (!cell.IsFocused)
{
cell.Focus();
}
if (datagrid.SelectionUnit != DataGridSelectionUnit.FullRow)
{
if (!cell.IsSelected)
{
cell.IsSelected = true;
}
}
else
{
DataGridRow row = FindVisualParent<DataGridRow>(cell);
if (row != null && !row.IsSelected)
{
row.IsSelected = true;
}
}
}
}
public static T FindVisualParent<T>(UIElement element) where T : UIElement
{
UIElement parent = element;
while (parent != null)
{
T correctlyTyped = parent as T;
if (correctlyTyped != null)
{
return correctlyTyped;
}
parent = VisualTreeHelper.GetParent(parent) as UIElement;
}
return null;
}