I created a form with three tabs. The button below is under one tab and when clicked fills the ListBox
readBox with items from a text file. What I cannot figure out how to do is remove the items from the ListBox` when I switch to another tab. Any help would be appreciated. Thanks.
private void read_Click(object sender, EventArgs e)
{
FileStream file = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Read, FileShare.ReadWrite);
StreamReader read = new StreamReader(file);
string readIt;
string[] show;
string birthday;
readIt = read.ReadLine();
while (readIt != null)
{
show = readIt.Split(DELIM);
friend.FirstName = show[0];
friend.LastName = show[1];
friend.PhoneNumber = show[2];
birthday = show[3] + "/" + show[4];
readIt = String.Format("{0, -10}{1, -10}{2,-10}{3, -3}", friend.FirstName,
friend.LastName, friend.PhoneNumber, birthday);
readBox.Items.Add(readIt);
readIt = read.ReadLine();
}
read.Close();
file.Close();
}
捕获TabControl.SelectedIndexChanged
事件,并在处理程序中调用readBox.Items.Clear()
Use readBox.Items.Clear()
, to remove all items (=> see MSDN) from your ListBox. If you want to do this on tab changing, pick up a SelectedIndexChanged
.
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