public static MvcHtmlString PageLinks(this HtmlHelper html,
PagingInfo pagingInfo,
Func<int,string> pageUrl)
{
var result = new StringBuilder();
for(int i=1; i<=pagingInfo.TotalPages;i++)
{
var tag = new TagBuilder("a"); // Constructor for a <a> tag
tag.MergeAttribute("href",pageUrl(i));
tag.InnerHtml = i.ToString();
if(i==pagingInfo.CurrentPage)
tag.AddCssClass("selected");
result.Append(tag.ToString());
}
return MvcHtmlString.Create(result.ToString());
}
public void Can_Generate_Page_Links()
{
// Arrange - define an HTML helper - we need to do this
// in order to apply the extension method
HtmlHelper myHelper = null;
// Arrange - create PagingInfo Data
var pagingInfo = new PagingInfo
{
CurrentPage = 2,
TotalItems = 28,
ItemsPerPage = 10
};
// Arrange - set up the delegate using a lamda expression
Func<int, string> pageUrlDelegate = i => "Page" + i;
// Act
var result = myHelper.PageLinks(pagingInfo, pageUrlDelegate);
// Assert
Assert.AreEqual(result.ToString(), @"<a href=""Page1"">1</a><a class=""selected"" href=""Page2"">2</a><a href=""Page3"">3</a>");
}
