Displaying records grouped by month and year in asp.net

Question

I need to sort my records by date (month & year) as displayed on my asp.net page;
Any ideas / suggestions would be helpful.

This is the code I currently ha

Answer 1

The ASP.NET content that you have should be put in a Repeater. The files that you have should then be grouped by the month and date. So basically you will end up with a parent-child list. The parent which is the group of files will be bound to the Repeater, and the children which are the files belonging to that group will be bound the the GridView in the Repeater.

The ASP.NET content

The ASP.NET content would be something along this line. Take note the gvInvoiceList DataSource property is bound to InvoiceList, a property of the group that I came up with (which you will see in the code below) that will have a list of files belonging to the group.

The code-behind

As for the code, I'm not fluent on using DataTable to have the parent-child relationship needed for the ASP.NET structure that I used for my answer, but it should be easily doable using normal classes. And I'm also not fluent on using VB.NET, so excuse my example which will be using C#, which I guess you should able to convert it quite easily to VB.NET.

I'm using Linq to do the grouping and an anonymous class to have the parent-child relationship for this, so the code is rather short.

repInvoiceGroups.DataSource = files
    .GroupBy(f => f.LastWriteTime.ToString("yyyy-MM"))
    .Select(g => new { 
        MonthYear = DateTime.ParseExact(g.Key, "yyyy-MM", CultureInfo.InvariantCulture), 
        InvoiceList = g.OrderByDescending(f => f.LastWriteTime) })
    .OrderByDescending(o => o.MonthYear);
repInvoiceGroups.DataBind();

p/s: The code was written in a text editor and untested. Let me know if you face any errors. :)