Question

对不起我的英语，这不是我的母语。如果你不明白，请告诉我。

我正在启动C＃和WPF，我需要在两个datagrid之间实现拖放功能。我已经搜索了很多，但我找不到任何可以帮助我的东西。它总是显示如何在两个不同的控件之间拖放，或者只在同一个数据网格中拖放，我无法根据需要调整这些答案，因为我不了解解决方案的某些部分。所以我来到这里问一个非常精确的问题：如何在两个数据网格之间实现拖放？

如果你能帮助我，我将非常感激。

Answer 1

这是一个示例代码（More Details here）

定义MouseDown事件
定义MouseMove事件以启动DragAndDrop操作
定义DragOver以测试是否允许放弃
定义Drop事件以执行放置操作

您可以对两个数据网格使用相同的事件

    private Point? _startPoint;

    private void dataGrid_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        _startPoint = e.GetPosition(null);
    }

    private void dataGrid_PreviewMouseMove(object sender, MouseEventArgs e)
    {
        // No drag operation
        if (_startPoint == null)
            return;

        var dg = sender as DataGrid;
        if (dg == null) return; 
        // Get the current mouse position
        Point mousePos = e.GetPosition(null);
        Vector diff = _startPoint.Value - mousePos;
        // test for the minimum displacement to begin the drag
        if (e.LeftButton == MouseButtonState.Pressed &&
            (Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance ||
            Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance))
        {

            // Get the dragged DataGridRow
            var DataGridRow=
                FindAnchestor<DataGridRow>((DependencyObject)e.OriginalSource);

            if (DataGridRow == null)
                return;
            // Find the data behind the DataGridRow
            var dataTodrop = (DataModel)dg.ItemContainerGenerator.
                ItemFromContainer(DataGridRow);

            if (dataTodrop == null) return;

            // Initialize the drag & drop operation
            var dataObj = new DataObject(dataTodrop);
            dataObj.SetData("DragSource", sender);
            DragDrop.DoDragDrop(dg, dataObj, DragDropEffects.Copy);
            _startPoint = null;
        }
    }

    private void dataGrid_PreviewMouseUp(object sender, MouseButtonEventArgs e)
    {
        _startPoint = null;
    }

    private void dataGrid_Drop(object sender, DragEventArgs e)
    {
        var dg = sender as DataGrid;
        if (dg == null) return;
        var dgSrc = e.Data.GetData("DragSource") as DataGrid;
        var data = e.Data.GetData(typeof(DataModel));
        if (dgSrc == null || data == null) return;
        // Implement move data here, depends on your implementation
        MoveDataFromSrcToDest(dgSrc, dg, data);
        // OR
        MoveDataFromSrcToDest(dgSrc.DataContext, dg.DataContext, data);
    }

    private void dataGrid_PreviewDragOver(object sender, DragEventArgs e)
    {
         // TO test if drop is allowed, to avoid drop 
         // if false e.Effects = DragDropEffects.None;
    }


    // Helper to search up the VisualTree
    private static T FindAnchestor<T>(DependencyObject current)
        where T : DependencyObject
    {
        do
        {
            if (current is T)
            {
                return (T)current;
            }
            current = VisualTreeHelper.GetParent(current);
        }
        while (current != null);
        return null;
    }

希望这有帮助：）

Answer 2

为此，您需要在xaml中使用两个这样的Datagrid提要列表或observableCollection：

_f=$(sed -r 's#(.*/)*(...-)?(.*).sh#\3#' <<< "$f")
__f="CT_DEBUG_${_f^^}"

我让您使用以下命令插入Datagrid的来源：

<table id="bootstrap-data-table" class="table table-striped table-bordered"> <thead> <tr> <th>Name</th> <th>Position</th> <th>Office</th> <th>Salary</th> </tr> </thead> <?php // Attempt select query execution $sql = "SELECT * FROM registers"; if($result = mysqli_query($link, $sql)) { if(mysqli_num_rows($result) > 0){ while($row = mysqli_fetch_array($result)) { $test= $row['id']; <tr> <td><?=$row['id']; ?></td> <td><?=$row['name']; ?></td> <td><?=$row['email']; ?></td> <td><?=$row['company']; ?></td> </tr> } mysqli_free_result($result); } else { echo "No records matching your query were found."; } } else { echo "ERROR: Could not able to execute $sql. " . mysqli_error($link); } ?> </table>

<DataGrid AllowDrop="True" Name="dg1" Margin="10,50,10,30" Grid.Column="1"> //Set your column and what you want </DataGrid> <DataGrid Name="dg2" AllowDrop="True" Margin="10,50,10,30" Grid.Column="2"> //Set your column and what you want </DataGrid>

将源代码填充到数据网格中后，请将其添加到代码c＃的顶部：

dg1.ItemSource = "yourlist1";

然后将所有这些添加到MainWindow之后：

dg2.ItemSource = "yourlist2";

您所要做的就是用Datagrid的名称替换“ dg1”和“ dg2”，并用提供给Datagrid的列表替换“ yourlist1”和“ yourlist2”。

也请为我的英语打个招呼，因为我根本不会说英语，而且我受到拉杰·库马尔（Raj Kumar）的文章https://www.c-sharpcorner.com/UploadFile/raj1979/drag-and-drop-datagrid-row-in-wpf/

的启发

在WPF中的两个Datagrid之间拖放（C＃）

2 个答案: