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.AppendLine(tag.ToString());
}
return MvcHtmlString.Create(result.ToString());
}
public void Can_Generate_Links_To_Other_Pages()
{
// ARRANGE: html helper class can be null
HtmlHelper html = null;
// ARRANGE: the helper will take a PagingInfo instance and a lambda to specify the URL
PagingInfo pagingInfo = new PagingInfo
{
CurrentPage = 2,
TotalItems = 28,
ItemsPerPage = 10
};
Func<int, string> pageUrl = i => "Page" + i;
// ACT: switch the page??
MvcHtmlString result = html.PageLinks(pagingInfo, pageUrl);
// ASSERT: verify format of the page/url
result.ToString().ShouldEqual(@"<a href=""Page1"">1</a>
<a class=""selected"" href=""Page2"">2</a>
<a href=""Page3"">3</a>
");
}
