I am trying to make a search box for my listview, but not work correctly

Question

1.00/5 (1 vote)

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The code only works once when you start

What I have tried:

C#

private void textBox1_TextChanged(object sender, EventArgs e)
       {
           for (int i = 0; i < listView1.Items.Count; i++)
           {

              if (listView1.Items[i].SubItems[0].Text.Contains(textBox1.Text) ||
              listView1.Items[i].SubItems[1].Text.Contains(textBox1.Text) ||
              listView1.Items[i].SubItems[2].Text.Contains(textBox1.Text))
               {
                   productList.Add(listView1.Items[i]);
               }
           }

           if ( !(string.IsNullOrWhiteSpace(textBox1.Text)) )
           {
               foreach (ListViewItem item in listView1.Items)
               {
                   if (productList.Find(x => x == item) == null)
                   {
                       listremovedProducts.Add(item);
                       listView1.Items.Remove(item);
                   }
               }

           }
           else
           {
               try
               {
                   foreach (var item in listremovedProducts)
                   {
                       listView1.Items.Add(item);
                   }
               }
               catch (Exception) { };
           }
       }
   }

Posted 22-Jan-18 9:18am

Tural_m

Updated 23-Jan-18 8:37am

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Comments

j snooze 22-Jan-18 17:08pm

Did you try setting a breakpoint and debugging the code at all? might shed some light on the issue for you.

Tural_m 23-Jan-18 6:06am

Yes, I did so, every time go into the loop but does not find it .. but when you first start everything works fine

CHill60 23-Jan-18 4:52am

this is getting called for every character you type into textBox1 - try using a different event ... look for ones that contain "valid"

Tural_m 23-Jan-18 6:07am

Ok, i will try

Ammar Shaukat 23-Jan-18 8:30am

This is not that complex . You should spend some time with Paper and pencil first to make a good logic for your Task. Once you done with that then move towards Code and debug if you don't get the right output.

Tural_m 23-Jan-18 14:37pm

Thanks guys, I decided

1 solution

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Tural_m · Accepted Answer · 2018-01-23T08:37:00

C#

<pre> private void textBox1_TextChanged(object sender, EventArgs e)
        {
           
            if (!string.IsNullOrWhiteSpace(textBox1.Text))
            {
                for (int i = 0; i < listView1.Items.Count; i++)
                {

                    if ((listView1.Items[i].SubItems[0].Text.Substring(0,textBox1.Text.Length) != textBox1.Text ||
                   listView1.Items[i].SubItems[1].Text.Substring(0,textBox1.Text.Length) != textBox1.Text||
                   listView1.Items[i].SubItems[2].Text.Substring(0, textBox1.Text.Length) != textBox1.Text))
                    {
                       
                        listView1.Items.Remove(listView1.Items[i]);
                        i--;
                    }
                }
            }
            else
            {
                foreach (ListViewItem item in listView1.Items)
                {
                    listView1.Items.Remove(item);
                }
                foreach (ListViewItem item in listesas)
                {
                    listView1.Items.Add(item);
                }
            }
        }