/// <summary>
/// 改变焦点
/// </summary>
/// <param name="changeType">0:获取默认，1:获取下一行，2:获取上一行</param>
public void GetGridFocus(int changeType = 0)
{
if (changeType == 1)
{
if (dataGrid.SelectedIndex > 0)
{
dataGrid.SelectedIndex -= 1;
}
}
else if (changeType == 2)
{
dataGrid.SelectedIndex += 1;
}
else
{
dataGrid.SelectedIndex = 0;
}
dataGrid.Focus();
if (dataGrid.SelectedItem == null)
{
return;
}
System.Windows.Controls.DataGridCell cell = (dataGrid.Columns[0].GetCellContent(dataGrid.SelectedItem))?.Parent as System.Windows.Controls.DataGridCell; if (cell == null)
{
return;
}
cell.IsTabStop = false;
cell.Focus();
}
/// <summary>
/// Selects the row by indexes.
/// </summary>
/// <param name="dataGrid">The data grid.</param>
/// <param name="rowIndexes">The row indexes.</param>
/// <exception cref="ArgumentException">
/// The SelectionUnit of the DataGrid must be set to FullRow.
/// or
/// The SelectionMode of the DataGrid must be set to Extended.
/// or
/// Invalid number of indexes.
/// or
/// </exception>
public static void SelectRowByIndexes(this DataGrid dataGrid, params int[] rowIndexes)
{
if (!dataGrid.SelectionUnit.Equals(DataGridSelectionUnit.FullRow))
{
throw new ArgumentException("The SelectionUnit of the DataGrid must be set to FullRow.");
}
if (!dataGrid.SelectionMode.Equals(DataGridSelectionMode.Extended))
{
throw new ArgumentException("The SelectionMode of the DataGrid must be set to Extended.");
}
if (rowIndexes.Length.Equals(0) || rowIndexes.Length > dataGrid.Items.Count)
{
throw new ArgumentException("Invalid number of indexes.");
}
dataGrid.SelectedItems.Clear();
foreach (int rowIndex in rowIndexes)
{
if (rowIndex < 0 || rowIndex > (dataGrid.Items.Count - 1))
{
throw new ArgumentException(string.Format("{0} is an invalid row index.", rowIndex));
}
object item = dataGrid.Items[rowIndex]; //=Product X
dataGrid.SelectedItems.Add(item);
DataGridRow row = dataGrid.ItemContainerGenerator.ContainerFromIndex(rowIndex) as DataGridRow;
if (row == null)
{
dataGrid.ScrollIntoView(item);
row = dataGrid.ItemContainerGenerator.ContainerFromIndex(rowIndex) as DataGridRow;
}
if (row != null)
{
System.Windows.Controls.DataGridCell cell = GetCell(dataGrid, row, 0);
if (cell != null)
{
cell.Focus();
}
}
}
}