to avoid the duplicates item insert in listview

anamika sharma

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!");

}

3 Replies

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Yin14y ago
foreach (ListViewItem lvi in this.lv_Model.Items)
                {
                    if (cbo.Text == lvi.SubItems[2].Text)
                    {
                        //remove
                    }
                    else
                    {
                       //add
                    }
                }
anamika sharma14y ago
I also Use the foreach loop but it does not work,it is produce to error and the error is(Error1foreach statement cannot operate on variables of type 'System.Windows.Forms.ListView' because 'System.Windows.Forms.ListView' does not contain a public definition for 'GetEnumerator'
Error2foreach statement cannot operate on variables of type 'bool' because 'bool' does not contain a public definition for 'GetEnumerator'
Error3The 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
Yin14y ago
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 < lv_Listview.Items.Count; i++)
            {
                foreach (ListViewItem lv in lv_Listview.Items)
                {
                    if (cbo.Text == lv)
                    {
                        //already exists
                    }
                    else
                    {
                    }
                }
            }