C# 从 Asp.net ListBox 中删除选定的项目
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Remove selected Items from Asp.net ListBox
提问by Ronald McDonald
I need to remove the selected items from a ListBox in asp.net. I keep finding examples for windows forms but not for asp.net.
我需要从 asp.net 的 ListBox 中删除选定的项目。我一直在寻找 windows 窗体的示例，但没有为 asp.net 寻找示例。
I have a button click event that copies all items from one listbox to another. I want to be able to select individual items from the second listbox and click a button to remove them.
我有一个按钮单击事件，可将所有项目从一个列表框复制到另一个列表框。我希望能够从第二个列表框中选择单个项目，然后单击一个按钮将其删除。
protected void btnAddAllProjects_Click(object sender, EventArgs e)
{
foreach (ListItem item in lstbxFromUserProjects.Items)
{
lstBoxToUserProjects.Items.Add(item.ToString());
}
}
protected void btnRemoveSelected_Click(object sender, EventArgs e)
{}
采纳答案by WraithNath
If you just want to clear the selected items then use the code below:
如果您只想清除所选项目，请使用以下代码：
ListBox1.ClearSelection();
//or
foreach (ListItem listItem in ListBox1.Items)
{
listItem.Selected = false;
}
If you mean to what to actually remove the items, then this is the code for you..
如果您的意思是实际删除项目的内容，那么这就是适合您的代码..
List<ListItem> itemsToRemove = new List<ListItem>();
foreach (ListItem listItem in ListBox1.Items)
{
if (listItem.Selected)
itemsToRemove.Add(listItem);
}
foreach (ListItem listItem in itemsToRemove)
{
ListBox1.Items.Remove(listItem);
}
回答by Manoja
protected void ButtonRemoveSelectedItem_Click(object sender, EventArgs e)
{
int position = 0;
for (byte i = 0; i < ListBox2.Items.Count; i++)
{
position = ListBox2.SelectedIndex ;
}
ListBox2.Items.RemoveAt(position);
}
回答by bigtech
I tried some experiments and the technique below works. It's not very efficient, in that it requeries the listbox on each iteration, but it gets the job done.
我尝试了一些实验，下面的技术有效。它不是很有效，因为它在每次迭代时重新查询列表框，但它完成了工作。
while (myListBox.SelectedIndex != -1)
{
ListItem mySelectedItem = (from ListItem li in myListBox.Items where li.Selected == true select li).First();
myListBox.Items.Remove(mySelectedItem);
};
回答by user3040772
int a = txtbuklist.SelectedIndex;
txtbuklist.Items.RemoveAt(a);
回答by BenW
Why not simply use the Items.Remove and pass the selected item string value.
为什么不简单地使用 Items.Remove 并传递选定的项目字符串值。
ListBox1.Items.Remove(ListBox1.SelectedItem.ToString());
回答by Meet Varasada
Try this to remove selected items from list box.
试试这个从列表框中删除选定的项目。
protected void Remove_Click(object sender, EventArgs e)
{
while (ListBox.GetSelectedIndices().Length > 0)
{
ListBox.Items.Remove(ListBox.SelectedItem);
}
}
