我有一个错误，您能帮我吗? [英] I have an error, can you help me?

问题描述

编写此代码时出现错误:

I have an Error when I write this code :

for (int i = 0; i < ListBox1.Items.Count - 1; i++)
{
  if (ListBox1.Items[i].Selected)
    TextBox1.Text = ListBox1.Items[i].Text;
}

return null;

推荐答案

如果要循环选择的项目，则使用ListBox的SelectedItems属性:

Hi,
if you want to loop though selected items just use SelectedItems property of ListBox:

for (int i = 0; i < this.listBox1.SelectedItems.Count; i++)
{
    textBox1.Text += listBox1.SelectedItems[i].ToString() + "\r\n";
}

您遇到什么错误?在此处粘贴异常代码

what error you got? paste the exception code here

我想您要将列表框的选定项添加到文本框中.为此

首次初始化

I think you want to add the selected item of list box into the text box.for that

first initialise

TextBox1.Text=string.empty;

TextBox1.Text += ListBox1.Items[i].Text;

或

or

TextBox1.Text =TextBox1.Text+ ListBox1.Items[i].Text;

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