如何在wpf gatagrid中设置当前单元格 [英] how to set current cell in wpf gatagrid

问题描述

Hai



我有一个名为Dg的Datagrid，我想以编程方式更改行和列。



我使用此代码



Dg.CurrentCell =新DataGridCellInfo（Dg.Items（IntRow），Dg.Columns（IntCol））

用于设置当前单元格，这样可以正常工作，但所选单元格的蓝色位于同一单元格中。请告诉我如何将这个焦点与当前单元格一起移动。



我不要制作Dg.SelectedCells.Clear（），因为这样只删除选择颜色和没关注。





谢谢

解决方案

您好使用下面的代码，

 DataGridCell objCellToFocus = DataGridExtensions.GetCell（Dg，（DataGridRow）Dg.ItemContainerGenerator.ContainerFromIndex（ 1 ）， 2 ）; 
 objCellToFocus.Focus（）; 

  public   static   class  DataGridExtensions 
 {
  public   static  DataGridCell GetCell（此 DataGrid网格，DataGridRow行， int  columnIndex =  0 ）
 {
  if （ row ==  null ） return   null ; 
 
  var  presenter = FindVisualChild< datagridcellspresenter>（row）; 
  if （presenter ==  null ） return   null ; 
 
  var  cell =（DataGridCell）presenter.ItemContainerGenerator.ContainerFromIndex（columnIndex）; 
  if （cell！=  null ） return 细胞; 
 
  //  现在尝试进入查看并检索单元格 
 grid.ScrollIntoView（row，grid.Columns [columnIndex]）; 
 cell =（DataGridCell）presenter.ItemContainerGenerator.ContainerFromIndex（columnIndex）; 
 
  return  cell; 
} 
 
  public   static  IEnumerable< t> FindVisualChildren< t>（DependencyObject depObj）其中 T：DependencyObject 
 {
  if  （depObj！=  null ）
 {
  for （ int  i =  0 ; i <  VisualTreeHelper.GetChildrenCount（depObj ）; i ++）
 {
 DependencyObject child = VisualTreeHelper.GetChild（depObj，i）; 
  if （child！=  null && child   T）
 {
  yield   return （ T）的孩子; 
} 
 
  foreach （T childOfChild   FindVisualChildren< t> （孩子））
 {
  yield   return  childOfChild; 
} 
} 
} 
} 
 
  public   static  childItem FindVisualChild< childitem>（DependencyObject obj）其中​​ childItem：DependencyObject 
 {
  foreach （childItem child  in  FindVisualChildren< childitem>（obj））
 {
 返回孩子; 
} 
 
  return   null ; 
} 
} 
 < /   childitem  >  < /   childitem  >  < /   t  >  < /   t   >  < /   t  >  < /   datagridcellspresenter  >  

Hai

I have a Datagrid called Dg and I want to programatically change row and column.

I use this code

Dg.CurrentCell = New DataGridCellInfo(Dg.Items(IntRow), Dg.Columns(IntCol))
for setting the current cell and this is working fine but the blue color of selected cell stands in the same cell. Please tell me how to move this focus along with the current cell.

I don't to make Dg.SelectedCells.Clear() as this removes only selection color and not focus.


Thanks

解决方案

Hi use the following code,

DataGridCell objCellToFocus = DataGridExtensions.GetCell(Dg,(DataGridRow)Dg.ItemContainerGenerator.ContainerFromIndex(1), 2);
            objCellToFocus.Focus();

public static class DataGridExtensions
    {
        public static DataGridCell GetCell(this DataGrid grid, DataGridRow row, int columnIndex = 0)
        {
            if (row == null) return null;

            var presenter = FindVisualChild<datagridcellspresenter>(row);
            if (presenter == null) return null;

            var cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
            if (cell != null) return cell;

            // now try to bring into view and retreive the cell
            grid.ScrollIntoView(row, grid.Columns[columnIndex]);
            cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);

            return cell;
        }

        public static IEnumerable<t> FindVisualChildren<t>(DependencyObject depObj) where T : DependencyObject
        {
            if (depObj != null)
            {
                for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
                {
                    DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
                    if (child != null && child is T)
                    {
                        yield return (T)child;
                    }

                    foreach (T childOfChild in FindVisualChildren<t>(child))
                    {
                        yield return childOfChild;
                    }
                }
            }
        }

        public static childItem FindVisualChild<childitem>(DependencyObject obj) where childItem : DependencyObject
        {
            foreach (childItem child in FindVisualChildren<childitem>(obj))
            {
                return child;
            }

            return null;
        }
    }
</childitem></childitem></t></t></t></datagridcellspresenter>

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