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
PagingInfo 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
MvcHtmlString 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>");
}
public static MvcHtmlString PageLinks(this HtmlHelper html,PagingInfo pagingInfo, Func<int,string> pageUrl )
{
StringBuilder result= new StringBuilder();
for (int i = 1; i <= pagingInfo.TotalPages; i++)
{
TagBuilder tag= new TagBuilder("a");//Construct an <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());
}