删除列表框中的项目的语法是什么? [英] what is the syntax for delete an item in listbox?
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问题描述
有人知道吗?
Can anyone know?
what is the syntax for delete an item in listbox?
推荐答案
亲爱的朋友,
我正在为您提供删除一项或多项的解决方案.
要选择多个项目,您需要设置.SelectionMode属性:
listBox1.SelectionMode = SelectionMode.MultiExtended;
接下来,假设您已通过编程方式将项目添加到ListBox中,而不是使用DataSource(如果ListBox使用数据源,则无法直接从Items集合中将其删除).
只是为了完成删除操作而以相反的顺序完成
.
您需要做的就是以相反的顺序使用.RemoveAt()方法(这很重要,请向后进行,否则它们将无法正确删除):-
Dear Friend,
I am giving you the solution to delete one or more than one item.
For multiple selection of Items, you need to set the .SelectionMode property:
listBox1.SelectionMode = SelectionMode.MultiExtended;
Next, I am assuming that you have added the Items to your ListBox programmatically rather than using a DataSource (you wouldn''t be able to remove them from the Items collection directly if the ListBox is using a DataSource).
It is done n the reverse order just in order to complete the operation of deletion successfuly
.
All you need to do is use the .RemoveAt() method, in reverse order (it is important to do it backwards, otherwise they won''t be removed properly):-
for (int i = listBox1.SelectedIndices.Count-1; i >= 0; i--)
{
listBox1.Items.RemoveAt(listBox1.SelectedIndices[i]);
}
OR
OR
for (int i = 0; i < listBox1.SelectedItems.Count; i++)
{
listBox1.Items.Remove(listBox1.SelectedItems[i].ToString());
i--;
}
ListBox1.Items.Remove(ListBox1.SelectedItem);
Hi,
protected void remove_Click(object sender, EventArgs e)
{
if (ListBox1.SelectedItem.Text == null)
{
lblError.Text = "Please select an item for deletion.";
}
else
{
string remove = ListBox1.SelectedItem.Text;
ListBox1.Items.Remove(remove);
}
}
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