Question

I have a listbox that has a List assigned as datasource:

List<String> files = new List<String>();   
files.Add("test");   
files.Add("test2");   
ListBox1.DataSource = files;   

Now the listbox shows me both entries of the List.

Is there a way to implement an easy filtering mechanism using a textbox?
So if i enter “2” into the textbox just the “test2” entry should be shown anymore.

Any suggestions?

Answer 1

You can filter List like this:

var filteredFiles = files.Where(x=>x.Contains(TextBox1.Text));

and than assign filteredFiles as DataSource

Hope this helps.

Edit:
Try this:

 var filteredFiles = files.Where(x=>x.Contains(TextBox1.Text)).ToArray();

or

 var filteredFiles = files.Where(x=>x.Contains(TextBox1.Text)).ToList();

Sorry, it has been a while since I did a databinding in asp.net 😀