Question

c# 窗体 获取listbox多选值的id

c# 窗体 获取listbox多选值的id 网上有说用 listbox1.DataSource = metierDs.Tables[0];
listbox1.DisplayMember = "name";
listbox1.ValueMember = "id"; string aa=""; for (int j = 0; j < listbox1.Items.Count; j++)
{
if (listbox1.Items[j].Selected == true)
aa += listbox1.SelectedValue.ToString() + ",";
}但是listbox1.Items[j].Selected 病不包含 Selected 的属性啊 该怎么去得 id？？

Answer 1

/// <summary>
/// 取ListBox选中项id
/// </summary>
/// <returns>id数组</returns>
private int[] GetIDS()
{
int[] id = new int[listBox1.SelectedIndices.Count];
for (int i = 0; i < listBox1.SelectedIndices.Count; i++)
{
id[i] = (int)listBox1.SelectedIndices[i];
}
return id;
} GetIDS()取出来的是选中项ID数组,你可以用循环遍历出来:int[] id=GetIDS();
textBox1.Clear();
for (int i = 0; i<id.Length; i++)
{
textBox1.Text += id[i].ToString();
}

Answer 2

上面写的是在webform中的，下面的是winform的：
for(int i=0; i <this.listBox1.SelectedItems.Count; i++)
{
aa += listbox1.SelectedValue.ToString() + ",";
}

Answer 3

是C#窗体程序？