在WPF中以编程方式更改DataGrid单元格值 [英] Change DataGrid cell value programmatically in WPF

问题描述

我有一个 DataGrid 视图，在运行时用列表填充内容。
我想要更改（例如）行中的单元格值：2和列：3。

I have a DataGrid view that fill it's content by a list in run time. I want to change (For example) cell value in row:2 and column:3.

我该怎么做？

推荐答案

这不是那么复杂。

你需要帮助函数;

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 DataGridRow GetSelectedRow(this DataGrid grid)
{
    return (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(grid.SelectedItem);
}
public static DataGridRow GetRow(this DataGrid grid, int index)
{
    DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
    if (row == null)
    {
        // May be virtualized, bring into view and try again.
        grid.UpdateLayout();
        grid.ScrollIntoView(grid.Items[index]);
        row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
    }
    return row;
}

public static DataGridCell GetCell(this DataGrid grid, DataGridRow row, int column)
{
    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;
}

public static DataGridCell GetCell(this DataGrid grid, int row, int column)
{
    DataGridRow rowContainer = grid.GetRow(row);
    return grid.GetCell(rowContainer, column);
}

使用yourDataGrid.GetCell（5，3）.Content =无论你想要什么;

Use yourDataGrid.GetCell(5, 3).Content = "whatever you want";

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