美好的一天
我必须在这里找到一些非常简单的东西;我有一个带有两个组合框列和一个datagridtextcolumn的数据网格。一旦用户选择了这两个组合框的值(范围从1到5),就用这两个值(在组合框选择改变事件上)进行计算。我需要将计算结果写入单元格(datagridtextcolumn),并根据值将该单元格的背景更改为特定颜色。我已经设法找到组合框中的值和当前行的索引,但是访问相关单元格来编写结果对我来说是好事......
以下是迄今为止调用计算的事件处理程序的编码:
private void cmbConseq_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var cellInfos = dgDeviation.SelectedCells;
if (cellInfos == null)
{
return;
}
var content = cellInfos[0].Column.GetCellContent(cellInfos[0].Item);
DataRowView row = (DataRowView)content.DataContext;//get the datacontext from FrameworkElement and typecast to DataRowView
object[] obj = row.Row.ItemArray;//ItemArray returns an object array with single element
int likely = Convert.ToInt16(obj[0]);
int cons = Convert.ToInt16(obj[1]);
int riskValue = new Calculations().riskRankingCalc(likely, cons);
int rowIndex = dgDeviation.Items.IndexOf(dgDeviation.CurrentItem);
如何将'riskValue'变量写入eventhandler中当前所选行的相关单元格?
答案 0 :(得分:1)
经过一些实验和其他SO问题的帮助后,对我有用的解决方案是实现以下两种辅助方法:
public static T GetVisualChild<T>(Visual parent) where T : Visual
{
T child = default(T);
int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < numVisuals; i++)
{
Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
child = v as T;
if (child == null)
{
child = GetVisualChild<T>(v);
}
if (child != null)
{
break;
}
}
return child;
}
public static DataGridCell GetCell(DataGrid grid, int column)
{
DataGridRow row = grid.ItemContainerGenerator.ContainerFromIndex(grid.SelectedIndex) as DataGridRow;
if (row != null)
{
DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(row);
if (presenter == null)
{
grid.ScrollIntoView(row, grid.Columns[column]);
presenter = GetVisualChild<DataGridCellsPresenter>(row);
}
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
return cell;
}
return null;
}
然后在单元格中进行更改就像调用一样简单:GetCell(myDatagrid,columnIndex).Content =&#34; New Value&#34 ;;