How can I remove item (entry from textbox) in listbox

Question

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SQL

In my form have TextBox1 and ListBox1, buttonAdd, buttonRemove

buttonAdd => OK, I can do it. buttonRemove: When you delete a section: - Delete entry from textbox: Check one item in the listbox item should be deleted, if there are clear, if not, the message is not found - Delete the selected item in listbox

This is my idea:

C#

private void butonRemove_Click(object sender, EventArgs e)
   {
       if (textbox1.Text != "")
       {
           int i = 0;
           while (i <= listbox1.Items.Count)
           {
               string Item_remove = textbox1.Text;
               if (listbox1.Items[i].ToString().Contains(Item_remove))
               {
                   DialogResult conf_remove;
                   conf_remove = MessageBox.Show("Do you wwant to remove: " + listbox1.Items[i].ToString(), "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
                   if (conf_remove == DialogResult.Yes)
                   {
                       listbox1.Items.RemoveAt(i);
                       break;
                   }
                   else if (conf_remove == DialogResult.No)
                       i++;
               }
               else
               {
                   MessageBox.Show("Not found");
                   break;
               }
           }

           textbox1.Text = "";
           textbox1.Focus();
       }
       else if (listbox1.SelectedIndex < 0)
           MessageBox.Show("Please select item to remove");
       else
           listbox1.Items.Remove(listbox1.SelectedItem);

Please help me fix it. Thank everyone

Posted 14-Jun-13 3:23am

Nguyễn Quang Nghĩa

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Comments

Abhinav S 14-Jun-13 9:27am

Your idea is ok. Are you getting some errors?

[no name] 14-Jun-13 9:27am

For some one to be able to tell you how to fix it, you would need to tell us what is broken.

Nguyễn Quang Nghĩa 14-Jun-13 9:37am

when I remove the item, if the item in the listbox, but if not, then the error occurs

[no name] 14-Jun-13 10:20am

What error? You have not said anything at all about any kind of an error yet.

sudipta biswas 14-Jun-13 9:37am

Maybe you should just use listbox1.Items.Contains(textbox1.Text) instead of the loop.

2 solutions

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sudipta biswas · Answer 1 · 2013-06-14T03:41:00

Solution 1

Please try this

C#

if (listbox1.Items.Contains(Item_remove))
            {
            //ask for confirmation
            //if yes then
              listbox1.Items.Remove(Item_remove);
            }

        else
        {
            MessageBox.Show("Not found");
        }

Posted 14-Jun-13 3:41am

sudipta biswas

Comments

Nguyễn Quang Nghĩa 14-Jun-13 10:07am

I want to know more about the case removed from the textbox entry, if there are several similar entries, eg THE THE man or woman, you need to check which ones you want to delete. If there is no entry in the listbox, the message is not found

samadhan_kshirsagar · Answer 2 · 2013-06-20T03:25:00

XML

Here's the code for remove item.

<pre lang="cs">private void buttonRemove_Click(object sender, EventArgs e) {
        if (listBox1.SelectedIndex == -1) { // Not Selected Anything
            MessageBox.Show(&quot;Select an item to delete&quot;);
        }
        else {
            listBox1.Items.RemoveAt(listBox1.SelectedIndex); // Remove item
        }
    }</pre>