操纵索引中的对象
本文关键字:对象 索引 操纵 | 更新日期: 2023-09-27 17:58:56
所以我可以通过索引删除,但我的问题是,有没有一种方法可以通过键入对象名称来删除对象?例如:输入sara按钮,它会从我的索引中删除那个对象。我的第二个问题是,有没有一种方法可以将一个新对象插入到我想要的索引中?
我是windows形式的,如果你能帮助我或链接我的教程,我会非常棒。
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
object[] names={"Sara", "Bill", "Martin", "Suasan", "Don"};
listBox1.Items.AddRange(names);
}
private void btnRemoveByIndex_Click(object sender, EventArgs e)
{
//remove by index
int index = int.Parse(txtIndex.Text);
if (index >= 0 && index < listBox1.Items.Count)
{
listBox1.Items.RemoveAt(index);
}
listBox1.ClearSelected();
}
private void btnRemoveByItem_Click(object sender, EventArgs e)
{
//remove objects
}
private void btnSpecIndex_Click(object sender, EventArgs e)
{
//insert new object
}
if (listBox1.SelectedItem != null)
listBox1.Items.Remove(listBox1.SelectedItem);
我更喜欢List而不是Array,
List<string> Names;
public Form1()
{
InitializeComponent();
Names = new List<string>();
Names.Add("Sara");
Names.Add("Bill");
Names.Add("Martin");
Names.Add("Susan");
Names.Add("Don");
listBox1.DataSource = Names;
}
private void button1_Click(object sender, EventArgs e)
{
if (listBox1.SelectedItem == "Sara")
{
Names.Remove("Sara");
}
//To Insert a new Name at specific index say 1st
Names.Insert(1, "Sample");
}
您需要使用listBox1.Items.Remove
object[] names = { "Sara", "Bill", "Martin", "Suasan", "Don" };
ListBox listBox1 = new ListBox();
listBox1.Items.AddRange(names);
// give a same names value to remove item from listbox
listBox1.Items.Remove("Sara");
如果您想在特定索引中插入项目,请使用
listBox1.Items.Insert(0, "tet"); //0 is index and "tet" is value