/// <summary>
/// This will return null if the item text begins with --
/// </summary>
/// <param name="dataItem"></param>
/// <returns></returns>
private MenuExItem CreateItem(object dataItem)
{
MenuExItem item = new MenuExItem();
item.Text = DataBinder.Eval(dataItem, this.DataTextField, "{0}");
if (this.DataFilterFields != null && this.DataFilterFields.Length > 0)
{
if (_evaluator == null)
{
_evaluator = new XPathEvaluator();
}
Dictionary <string, object> dict = this.DataFilterFields.Select((p, i) => new
{
Field = string.Format("Filter{0}", i),
Value = DataBinder.Eval(dataItem, p)
}).ToDictionary(p => p.Field, p => p.Value);
_evaluator.Callback = p => dict[p];
if (!_evaluator.Matches(this.FilterExpression))
{
return(null);
}
}
item.NavigateUrl = DataBinder.Eval(dataItem, this.DataNavigateUrlField, "{0}");
item.ToolTip = DataBinder.Eval(dataItem, this.DataToolTipField, "{0}");
if (!string.IsNullOrEmpty(this.DataRolesField))
{
IEnumerable roles = (IEnumerable)DataBinder.Eval(dataItem, this.DataRolesField);
string[] rolesArray = roles.Cast <string>().ToArray();
if (rolesArray.Length > 0)
{
item.RolesRequired = rolesArray;
}
}
return(item);
}
/// <summary>
/// Add <see cref="Items"/> from the data source. Derived classes should override this to add items
/// from their custom data source.
/// </summary>
protected virtual void PerformDataBinding()
{
IEnumerable data = PerformSelect();
if (data == null)
{
// Do nothing. This happens when no data source has been assigned to us
return;
}
_items.Clear();
if (data != null)
{
//DropDownItemEventArgs args = new DropDownItemEventArgs();
foreach (object dataItem in data)
{
MenuExItem item = CreateItem(dataItem);
// Sharad 5 Aug 2010: In security trimming scenarios, we get items with empty text. We should just ignore these.
if (item != null && !string.IsNullOrEmpty(item.Text))
{
if (this.DisplayChildItems)
{
IEnumerable children = (IEnumerable)DataBinder.Eval(dataItem, this.DataChildItemsField);
foreach (object childItem in children)
{
MenuExItem item2 = CreateItem(childItem);
if (item2 != null)
{
item.ChildItems.Add(item2);
}
}
}
_items.Add(item);
}
}
}
}
/// <summary>
/// Renders A tag and possibly a lock icon
/// </summary>
/// <param name="writer"></param>
/// <param name="item"></param>
/// <param name="itemWidth"></param>
private void RenderItem(HtmlTextWriter writer, MenuExItem item, Unit itemWidth)
{
if (!string.IsNullOrEmpty(item.ToolTip))
{
writer.AddAttribute(HtmlTextWriterAttribute.Title, item.ToolTip);
}
string iconName = string.Empty;
string[] y = new string[] { "ui-button", "ui-widget", "ui-corner-all" };
List <string> cssClasses = new List <string>(y);
if (IsSamePageUrl(item))
{
cssClasses.Add("ui-state-active");
}
else
{
cssClasses.Add("ui-state-default");
if (item.NavigateUrl.EndsWith("#"))
{
writer.AddStyleAttribute(HtmlTextWriterStyle.Cursor, "default");
iconName = "ui-icon-triangle-1-s";
}
else
{
string url = this.ResolveUrl(item.NavigateUrl);
writer.AddAttribute(HtmlTextWriterAttribute.Href, url);
int index = item.NavigateUrl.IndexOf('?');
bool isAccessible;
// Do not pass query string as part of URL
if (index < 0)
{
isAccessible = UrlAuthorizationModule.CheckUrlAccessForPrincipal(item.NavigateUrl, this.Page.User, "GET");
}
else
{
isAccessible = UrlAuthorizationModule.CheckUrlAccessForPrincipal(item.NavigateUrl.Substring(0, index), this.Page.User, "GET");
}
if (!isAccessible)
{
iconName = "ui-icon-locked";
cssClasses.Add("ui-priority-secondary");
}
}
}
if (string.IsNullOrEmpty(iconName))
{
cssClasses.Add("ui-button-text-only");
}
else
{
cssClasses.Add("ui-button-text-icon-primary");
}
writer.AddAttribute(HtmlTextWriterAttribute.Class, string.Join(" ", cssClasses.ToArray()));
if (itemWidth != Unit.Empty)
{
writer.AddStyleAttribute(HtmlTextWriterStyle.Width, itemWidth.ToString());
}
writer.RenderBeginTag(HtmlTextWriterTag.A);
if (!string.IsNullOrEmpty(iconName))
{
// Show lock icon
writer.AddAttribute(HtmlTextWriterAttribute.Class, "ui-button-icon-primary ui-icon " + iconName);
writer.RenderBeginTag(HtmlTextWriterTag.Span);
writer.RenderEndTag();
}
writer.AddAttribute(HtmlTextWriterAttribute.Class, "ui-button-text");
writer.RenderBeginTag(HtmlTextWriterTag.Span);
writer.Write(item.Text);
writer.RenderEndTag(); // span
writer.RenderEndTag(); // a
}
private bool IsSamePageUrl(MenuExItem item)
{
string url = this.ResolveUrl(item.NavigateUrl);
return(url == this.Page.Request.RawUrl);
}
