Filtering a list of objects without linq c#

Question

I have a list of objects called images which are obtained from parsing through a text file. They contain details such as the catagory and description. I want to be able to search through the list to find the images with a certain catagory and then display them on a form i have setup. I want to filter through them and then also be able to revert back to the unfiltered view aswell.

class Image
{
    public string FileName { set; get; }
    public string Description { set; get; }
    public string Catagory { set; get; }
    public string Date { set; get; }
    public string Comments { set; get; }
}

This is what i want to do in Linq

string chosenCatagory = CatagoryComboBox.Text;

ImageList = ImageList.Where(x => x.Catagory == chosenCatagory).ToList();

What would be the best way to approach this without using Linq?

Selman Genç · Accepted Answer · 2018-08-04 12:38:36Z

4

You can use List's FindAll method:

ImageList = ImageList.FindAll(x => x.Catagory == chosenCatagory);

answered Aug 4, 2018 at 12:38

Selman Genç

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1 Comment

Ross Over a year ago

Thanks a lot, next thing is how can i revert back to the unfiltered view as well after filtering it?

Quergo · Accepted Answer · 2018-08-06 15:49:51Z

0

Use two Lists. ImageList which contains all data and DisplayList which is filled only with the stuff you want to display.

DisplayList = ImageList.FindAll(x => x.Catagory == chosenCatagory);

And if you want to revert set DisplayList back to ImageList.

DisplayList = ImageList;

Also have a look at CollectionView when you wanna do more advanced stuff. It supports filtering, grouping and sorting.

answered Aug 6, 2018 at 15:49

Quergo

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