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WPF コードビハインドでDataGridのデータをクリップボードにコピー

Last updated at Posted at 2022-12-09

もっとスマートな方法がありそうな気もしますが。
意外と苦労したので備忘録として残しておきます。
DataGrid.Rowsプロパティとか用意されていないんですかね。

BindingするItemはインデクサを設定する必要があります。

#region インデクサ
/// <summary>
/// インデクサでアクセスするプロパティ
/// </summary>
/// <param name="propertyName">プロパティ名</param>
/// <returns>Object</returns>
public object this[string propertyName]
{
    get
    {
       return typeof(hogeClass).GetProperty(propertyName).GetValue(this);
    }

    set
    {
       typeof(hogeClass).GetProperty(propertyName).SetValue(this, value);
    }
 }
#endregion
public static void DataGridCopyToClipboard(DataGrid dataGrid)
{
    if (dataGrid == null) return;
    StringBuilder sb = new();
    string s = "";
    List<String> bindingItems = new List<string>();
    // ヘッダタイトルを出力
    foreach (DataGridColumn column in dataGrid.Columns)
    {
        if (column is DataGridBoundColumn && column.Visibility == Visibility.Visible)
        {
            s += column.Header.ToString() + "\t";
            DataGridBoundColumn boundColumn = (DataGridBoundColumn)column;
            Binding binding = (Binding)boundColumn.Binding;
            var path = binding.Path.Path;
            bindingItems.Add(path);
        }
    }
    sb.AppendLine(s.Trim('\t'));
    s = "";
    foreach (var row in dataGrid.Items)
    {
        // hogeClassはクラスです
        if (row is hogeClass)
        {
            hogeClass hogehoge = (hogeClass)row;
            foreach (string itemName in bindingItems)
            {
                s += hogehoge[itemName]?.ToString() + "\t";
            }
            sb.AppendLine(s.Trim('\t'));
            s = "";
        }
    }
    try
    {
        Clipboard.Clear();
        Clipboard.SetDataObject(sb.ToString());
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message, "エラー", MessageBoxButton.OK, MessageBoxImage.Error);
    }
}
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