C# 获取列表框中所选项目的文本
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Get text of selected items in a ListBox
提问by ?????? ??
I'm trying to show the selected items of listBox1 in a Message Box here's the code:
我正在尝试在消息框中显示 listBox1 的选定项目，这是代码：
int index;
string item;
foreach (int i in listBox1 .SelectedIndices )
{
index = listBox1.SelectedIndex;
item = listBox1.Items[index].ToString ();
groupids = item;
MessageBox.Show(groupids);
}
The problem is that when I select more than one item the message box shows the frist one I've selected and repeats the message EX: if I selected 3 items the message will appear 3 times with the first item
问题是，当我选择多个项目时，消息框会显示我选择的第一个项目并重复消息 EX：如果我选择了 3 个项目，该消息将与第一个项目一起出现 3 次
采纳答案by System Down
The iin the foreach loop has the index you need. You're using listBox1.SelectedIndexwhich only has the first one. So item should be:
该i在foreach循环中有你需要的指数。您正在使用listBox1.SelectedIndex它只有第一个。所以项目应该是：
item = listBox1.Items[i].ToString ();
回答by Jaime Torres
You can iterate through your items like so:
您可以像这样遍历您的项目：
foreach (var item in listBox1.SelectedItems)
{
MessageBox.Show(item.ToString());
}
回答by C-Pound Guru
How about 1 message box with all the selected items?
包含所有选定项目的 1 个消息框怎么样？
List<string> selectedList = new List<string>();
foreach (var item in listBox1.SelectedItems) {
selectedList.Add(item.ToString());
}
if (selectedList.Count() == 0) { return; }
MessageBox.Show("Selected Items: " + Environment.NewLine +
string.Join(Environment.NewLine, selectedList));
If any are selected, this should give you a line for each selected item in your message box. There's probably a prettier way to do this with linq but you didn't specify .NET version.
如果选择了任何一个，这应该为您的消息框中的每个选定项目提供一行。使用 linq 可能有一种更漂亮的方法来执行此操作，但您没有指定 .NET 版本。
回答by Kirill Kryazhnikov
Try this solution:
试试这个解决方案：
string item = "";
foreach (int i in listBox1.SelectedIndices )
{
item += listBox1.Items[i] + Environment.NewLine;
}
MessageBox.Show(item);
