How to clear data from list view in c#

Question

I have a button \"Show data\". When click it, data will display in list view. But I want to clear it and then click \"Show data\" again to display new data. Because I don\'t

Answer 1

put this at the top of your "Show Data" button's click event.

private void showData_Click(object sender, EventArgs e)  // done
        {
             listViewData.Items.Clear();
             // your code
        }

Answer 2

for listView on clicking first clear the list and then add items: like below

    private void button9_Click(object sender, EventArgs e)
    {
        listView1.Clear();
        listView1.Items.Add("Item1");
        listView1.Items.Add("Item2");
        listView1.Items.Add("Item3");
        listView1.Items.Add("Item4");
        listView1.Items.Add("Item5");
    }

for your second question try below link:

How to show data from Access on C#?