Question

我有一个网格，我知道用鼠标点击的X值和Y值。

示例：X：235，Y：235 - ＆gt;这应该是Column：3和Row：3

如何获得x和y坐标上的列和行？

我是否真的需要添加行/列的每个宽度，直到达到所需的x / y值？

我正在使用WPF（对于我的网格）＆amp; c＃（对于x和y位置）

有人可以帮我吗？

Answer 1

Math.Floor函数，例如：

Math.Floor(235/scale)
where scale is the the width or height of the grid cell.

定义：返回小于或等于指定数字的最大整数。 Math.ceil则相反。

Answer 2

为此，请考虑......

您的网格有一些背景颜色设置（即使Transparent也可以）。这是用于命中测试（鼠标单击空白网格区域）工作。
GridSplitter本身是网格中的成员。这一点很重要，因为单击网格分割器还会显示网格分割器所在的相应单元格索引（Column，Row）。
我们不关心此处的ColumnSpan和RowSpan。

XAML ......

<Window x:Class="WpfApplication3.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window1" Height="300" Width="300">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <Grid Mouse.PreviewMouseDown="Grid_MouseDown"
              Background="Transparent">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition/>
                <ColumnDefinition/>
                <ColumnDefinition/>
            </Grid.ColumnDefinitions>

            <GridSplitter ResizeDirection="Rows"
                          Width="{Binding ActualWidth,
                                    RelativeSource={RelativeSource
                                          AncestorType=Grid}}"
                          Height="4" Grid.ColumnSpan="3"
                          Background="Red" Grid.Row="1" />                
            <TextBox Height="60" AcceptsReturn="True" 
                     Text="Element1"
                     ScrollViewer.VerticalScrollBarVisibility="Visible" />
            <Button Content="Element2" Grid.Column="1"/>
            <TextBlock Text="Element4" Grid.Row="2" Width="100"
                       Height="40" HorizontalAlignment="Left"
                       VerticalAlignment="Center"/>
            <ComboBox SelectedIndex="0" Height="20"
                      Grid.Column="1" Grid.Row="2">
                <ComboBoxItem Content="Element5"/>
            </ComboBox>
            <CheckBox Content="Element3" Grid.Column="2"/>
            <RadioButton Content="Element6" Grid.Row="2"
                         Grid.Column="2" VerticalAlignment="Center"
                         HorizontalAlignment="Center"/>
        </Grid>
        <StackPanel Orientation="Horizontal" Grid.Row="1">
            <TextBlock Text="Selected Column and Row is ... " Margin="5"/>
            <TextBlock x:Name="StatusTextBlock" FontSize="12"
                       FontWeight="SemiBold" Margin="5"/>
        </StackPanel>
    </Grid>
</Window>

代码背后......

    private void Grid_MouseDown(object sender, MouseButtonEventArgs e)
    {
        int selectedColumnIndex = -1, selectedRowIndex = -1;
        var grid = sender as Grid;
        if (grid != null)
        {
            var pos = e.GetPosition(grid);
            var temp = pos.X;
            for (var i = 0; i < grid.ColumnDefinitions.Count; i++ )
            {
                var colDef = grid.ColumnDefinitions[i];
                temp -= colDef.ActualWidth;
                if (temp <= -1)
                {
                    selectedColumnIndex = i;
                    break;
                }
            }

            temp = pos.Y;
            for (var i = 0; i < grid.RowDefinitions.Count; i++)
            {
                var rowDef = grid.RowDefinitions[i];
                temp -= rowDef.ActualHeight;
                if (temp <= -1)
                {
                    selectedRowIndex = i;
                    break;
                }
            }
        }

        StatusTextBlock.Text = selectedColumnIndex + ", " + selectedRowIndex;
    }

从X和Y位置获取网格行和列

2 个答案: