How do I filter my datagirdview using a textbox?

Question

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Te         


        

Answer 1

If you want to be able to filter and sort, then you can use the SortableList<T> as above.

If you really just want to filter, though, it's as simple as this: store the tanks list, and assign the datasource as a subset of tanks when the filter changes:

// 'tanks' is stored as a field when loaded from disk
private List<TankClass> tanks;

protected void LoadData()
{
    tanks = new List<TankClass>();
    string[] lines = File.ReadAllLines(@"C:\Users\bluehalo\Documents\tank chart 2.txt");
            
    for (int i = 0; i < lines.Length; i++)
    {
        TankClass tank = new TankClass(lines[i].ToString());
        tanks.Add(tank);    
    }
    
    dataGridView1.DataSource = tanks;
}

And when you want to filter:

private void textBox1_TextChanged(object sender, EventArgs e)
{
    // name contains text
    dataGridView1.DataSource = tanks.Where(t => t.Name.IndexOf(textBox1.Text, StringComparison.OrdinalIgnoreCase) > -1).ToList()
}