Andrew Rea : ASP.NET MVC

Creating an Extended Content Result for ASP.NET MVC

REA_ANDREW — Mon, 14 Dec 2009 00:11:51 GMT

I had a requirement on a small home project I am working on, where I need to add some more information to a content result than was there. More specifically I had to add the status code and also have access to the response header collection. I did come across an interesting thing with this, where by accessing and adding to the response header collection in a certain way will actually raise an exception and inform you that this is only support when IIS Integrated Pipeline is enabled. I did some looking about and found a post by Phil Haack showing how he had achieved what I was looking for when he made the Download result class.

So the following causes an exception:

public override void ExecuteResult(ControllerContext context)
        {
            context.HttpContext.Response.StatusCode = (int)StatusCode;
            foreach (string s in Headers.Keys)
            {
                context.HttpContext.Response.Headers.Add(s,Headers[s]);
            }
            base.ExecuteResult(context);
        }

And the following works fine, notice the subtle difference in how the header is added now:

        public override void ExecuteResult(ControllerContext context)
        {
            context.HttpContext.Response.StatusCode = (int)StatusCode;
            foreach (string s in Headers.Keys)
            {
                context.HttpContext.Response.AddHeader(s,Headers[s]);
            }
            base.ExecuteResult(context);
        }

So the full code implementation of the result is below.

 public class ExtendedContentResult : ContentResult
    {
        public NameValueCollection Headers { get; set; }
        public HttpStatusCode StatusCode { get; set; }

        public ExtendedContentResult()
        {
            Headers = new NameValueCollection();
        }

        public override void ExecuteResult(ControllerContext context)
        {
            context.HttpContext.Response.StatusCode = (int)StatusCode;
            foreach (string s in Headers.Keys)
            {
                context.HttpContext.Response.AddHeader(s,Headers[s]);
            }
            base.ExecuteResult(context);
        }
    }

ASP.NET MVC "Pager" HTML Helper

REA_ANDREW — Tue, 01 Jul 2008 15:26:38 GMT

So I am building my own custom blog using the ASP.NET MVC Framework, and I have been working on the paging aspect. I will be going into more detail how i achieved this but for now, I am publishing a HtmlHelper I have made which has helped me, believe it or not lol, in the paging. The way I have designed it also is kind of decoupled, so i see no reason for its integration into many other applications.

My implmentation of the HtmlHelper is here:

<%= Html.Pager((pc.StartingIndex / pc.PageSize) ,pc.PageSize,pc.TotalRecords,"/Home/Page") %>

And the code which makes it is here. The major thing is calculating the seed of the iteration based on the current page, after that you are laughing!

    public static string Pager(this HtmlHelper helper, int currentPage, int currentPageSize, int totalRecords, string urlPrefix)
    {
        StringBuilder sb1 = new StringBuilder();

        int seed = currentPage % currentPageSize == 0 ? currentPage : currentPage - (currentPage % currentPageSize);

        if(currentPage > 0)
            sb1.AppendLine(String.Format("<a href=\"{0}/{1}\">Previous</a>", urlPrefix, currentPage));

        if(currentPage - currentPageSize >= 0)
            sb1.AppendLine(String.Format("<a href=\"{0}/{1}\">...</a>", urlPrefix, (currentPage - currentPageSize) + 1));

        for (int i = seed; i < Math.Round((totalRecords / 10) + 0.5) && i < seed + currentPageSize; i++)
        {
            sb1.AppendLine(String.Format("<a href=\"{0}/{1}\">{1}</a>", urlPrefix, i + 1));
        }

        if (currentPage + currentPageSize <= (Math.Round((totalRecords / 10) + 0.5) - 1))
            sb1.AppendLine(String.Format("<a href=\"{0}/{1}\">...</a>", urlPrefix, (currentPage + currentPageSize) + 1));

        if (currentPage < (Math.Round((totalRecords / 10) + 0.5) - 1))
            sb1.AppendLine(String.Format("<a href=\"{0}/{1}\">Next</a>", urlPrefix, currentPage + 2));

        return sb1.ToString();
    }

Hope this helps some people,

Cheers,

Andrew :-)

A Simple MVC Preview 3 Contact Form, Custom HtmlHelper and Model Example

REA_ANDREW — Thu, 05 Jun 2008 08:32:03 GMT

I have just recently designed a site for a client and decided to use MVC for it. I think above all the best thing I enjoy about it, is the clean markup that is outputted. Of course I also have great administration for the work and effort that...(read more)