to avoid the duplicates item insert in listview

Question

ListViewItem item;
item = new ListViewItem(new[] { comboBox1.SelectedItem.ToString(), comboBox2.SelectedItem.ToString(), comboBox3.SelectedItem.ToString() });

//listView1.Items.Add(item);

if (!listView1.Items.Contains(item))

{

Add the item to the ListView Control

listView1.Items.Add(item);

}

else

{

listView1.Items.Remove(item);

// // //Warn user of duplicate entry...

// //MessageBox.Show("Duplicate Item!");

}

Yin · Answer

foreach (ListViewItem lvi in this.lv_Model.Items) { if (cbo.Text == lvi.SubItems[2].Text) { //remove } else { //add } }

anamika sharma · Answer

I also Use the foreach loop but it does not workit is produce to error and the error is(Error 1 foreach statement cannot operate on variables of type 'System.Windows.Forms.ListView' because 'System.Windows.Forms.ListView' does not contain a public definition for 'GetEnumerator' Error 2 foreach statement cannot operate on variables of type 'bool' because 'bool' does not contain a public definition for 'GetEnumerator' Error 3 The best overloaded method match for 'System.Windows.Forms.ListView.ListViewItemCollection.Add(string)' has some invalid arguments item = new ListViewItem(new[] { comboBox1.SelectedItem.ToString() comboBox2.SelectedItem.ToString() comboBox3.SelectedItem.ToString() }); //listView1.Items.Add(item); if (!listView1.Items.Contains(item)) { foreach (ListView lst in item.ListView) { //Add the item to the ListView Control listView1.Items.Add(lst); } } else { listView1.Items.Remove(item); // //Warn user of duplicate entry... //MessageBox.Show(Duplicate Item!); } plz provide the proper code

Yin · Answer

Try using foreach to check in the listview if there is an existing item that you're trying to input in listview: for (int i = 1; i { foreach (ListViewItem lv in lv_Listview.Items) { if (cbo.Text == lv) { //already exists } else { } } }