Vfrdtyky

I've started to work with a dataGrid in WPF, but coming from WinForm, its a little different from what I'm used to..

My problem right now is that i need to get a specific cell's rectangle (so I can access its size & location).

In WinForm's datagrid there where a method called:

cellRectangle = dataGridView.GetCellDisplayRectangle(columnIndex, rowIndex, cutOverflow)

However, I cant seem to find anything like this in WPF, and everything i can find online is massivly complicated compared to what i used to be able to do in WinForm..

If possible, I would like to avoid any XAML code, and write it all in C# code

Hope someone of you have a solution to my problem.

WPF does not work with coordinates, but containers. If you want to put something into a DataGridCell, find it and put the new content in DataGridCell.Content.

In my sample, you can enter row and column number, then press Execute Code Button. This will place a button into the grid at the desired location. After clicking on Click Me, the button disappears and the old cell content is shown.

<Window x:Class="DataGridCell.MainWindow"

          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

          xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

          xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

          xmlns:local="clr-namespace:DataGridCell"

          mc:Ignorable="d"

          Title="MainWindow" Height="450" Width="800">

  <DockPanel>

    <StackPanel DockPanel.Dock="Top" Orientation="Horizontal" Background="LightGray">

      <Label Content="Row:"/>

      <TextBox Name="RowTextBox" Text="2"/>

      <Label Content="Column:"/>

      <TextBox Name="ColumnTextBox" Text="1"/>

      <Button DockPanel.Dock="Bottom" Content="Execute Code" Name="ExecuteButton"/>

    </StackPanel>

    <DataGrid Name="MainDataGrid" ItemsSource="{Binding}" AutoGenerateColumns="False" >

      <DataGrid.Columns>

        <DataGridTextColumn Header="Col0" Binding="{Binding Col0}"/>

        <DataGridTextColumn Header="Col1" Binding="{Binding Col1}" />

        <DataGridTextColumn Header="Col2" Binding="{Binding Col2}" />

      </DataGrid.Columns>

    </DataGrid>

  </DockPanel>

</Window>





using System.Collections.Generic;

using System.Collections.ObjectModel;

using System.Windows;

using System.Windows.Controls;



namespace DataGridCell {



  public class RowData {

    public string Col0 { get; set; }

    public string Col1 { get; set; }

    public string Col2 { get; set; }

  }



  public partial class MainWindow: Window {

    public MainWindow() {

      InitializeComponent();

      var dataList = new List<RowData>();

      dataList.Add(new RowData {Col0="0.0", Col1="0.1", Col2="0.2"});

      dataList.Add(new RowData {Col0="1.0", Col1="1.1", Col2="1.2"});

      dataList.Add(new RowData {Col0="2.0", Col1="2.1", Col2="2.2"});

      dataList.Add(new RowData {Col0="3.0", Col1="3.1", Col2="3.2"});

      ObservableCollection<RowData> custdata = new ObservableCollection<RowData>(dataList);

      MainDataGrid.DataContext = custdata;

      ExecuteButton.Click+=ExecuteButton_Click;

    }



    ContentControl cell;

    object oldContent;



    private void ExecuteButton_Click(object sender, RoutedEventArgs e) {

      var row = int.Parse(RowTextBox.Text);

      var col = int.Parse(ColumnTextBox.Text);

      var cellContent = (FrameworkElement)MainDataGrid.Columns[col].GetCellContent(MainDataGrid.Items[row]);

      cell = (ContentControl)cellContent.Parent;

      var button = new Button {Content="Click me" };

      button.Click += Button_Click;

      oldContent = cell.Content;

      cell.Content = button;

      ExecuteButton.IsEnabled = false;

    }



    private void Button_Click(object sender, RoutedEventArgs e) {

      cell.Content = oldContent;

      ExecuteButton.IsEnabled = true;

    }

  }

}

While this works, it is a bit of a hack. If the datagrid recreates its content, your button will be lost. This can happen for example, if the user clicks on a column head to sort the grid.

If you REALLY need the dimension of the cell, you can get it with cell.ActualWidth and cell.ActualHeight. But these values might change any time, for example when the user changes the width of the column. Coordinates are not used in WPF. If you need to define the exact place of your control, use it's Margin to position it.