WinForms のデータバインディングに関する妄想

gistfile1.cs

this.LabelScreenName.DataBindings.Add("Text", this.bindingSource, "ScreenName");

var binding = new Binding("Text", this.bindingSource, "Name");
binding.Format += (o, e) => e.Value = WebUtility.HtmlDecode(e.Value);
this.LabelName.DataBindings.Add(binding);

// ↑これを
// ↓ こんな感じに書きたい

BindToText(this.LabelScreenName, this.bindingSource,
    (User x) => x.ScreenName, null);

BindToText(this.LabelName, this.bindingSource,
    (User x) => x.Name, x => WebUtility.HtmlDecode(x));


private static void BindToText<T1, T2>(Control control, object source,
    Expression<Func<T1, T2>> expr, Func<T2, object> formatter)
{
    var memberExpr = (MemberExpression)expr.Body;

    var binding = new Binding("Text", source, memberExpr.Member.Name);

    if (formatter != null)
        binding.Format += (o, e) => e.Value = formatter((T2)e.Value);

    control.DataBindings.Add(binding);
}

さらにこんな感じで書けると尚よい

BindToText(this.LabelName, this.bindingSource, (User x) => WebUtility.HtmlDecode(x.Name));