?using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;
using System.Web.DynamicData;

public partial class TextField : System.Web.DynamicData.FieldTemplateUserControl {
    protected override void OnDataBinding(EventArgs e) {
        base.OnDataBinding(e);
        bool processed = false;
        var metadata = MetadataAttributes.OfType<DataTypeAttribute>().FirstOrDefault();
        if (metadata != null) {
            if (metadata.DataType == DataType.Url) {
                processed = true;
                string url = FieldValueString;
                if (!(url.StartsWith("http://", StringComparison.OrdinalIgnoreCase) || url.StartsWith("https://"))) {
                    url = "http://" + url;
                }
                HyperlinkText.Text = FieldValueString;
                HyperlinkText.NavigateUrl = url;
                HyperlinkText.Target = "_blank";
            } else if (metadata.DataType == DataType.EmailAddress) {
                if (!string.IsNullOrEmpty(FieldValueString)) {
                    processed = true;
                    HyperlinkText.Text = FieldValueString;
                    HyperlinkText.NavigateUrl = "mailto:" + FieldValueString;
                }
            }
        }
        if (!processed) {
            HyperlinkText.Text = FieldValueString;
            HyperlinkText.NavigateUrl = null;
        }
    }
}