How to search and select record in WPF DataGrid (SfDataGrid)?

private void searchTextBox_TextChanged(object sender, TextChangedEventArgs e)
{
    text = (e.Source as TextBox).Text.ToLower();
    this.datagrid.SearchHelper.Search(text);
    datagrid.SearchHelper.FindNext(text);
    SetSelectedItem();
}
 
private void SetSelectedItem()
{
    var rowIndex = this.datagrid.SearchHelper.CurrentRowColumnIndex.RowIndex;
    var recordIndex = this.datagrid.ResolveToRecordIndex(rowIndex);
    this.datagrid.SelectedIndex = recordIndex;
}
 
private void Button_Click(object sender, RoutedEventArgs e)
{
    datagrid.SearchHelper.FindNext(text);
    SetSelectedItem();
}