protected void btn_up_Click(object sender, EventArgs e)
...{
if (lb_busspot.SelectedIndex == -1)
...{
return;
}
//獲得連續選中的項索引
int[] Indices = lb_busspot.GetSelectedIndices();
int length = Indices.Length;
string text;
string value;
//如果選擇的最小索引是0,表示是最上面的項
if (Indices[0] == 0)
...{
return;
}
//判斷選擇多項時是否是連續的項
if (Indices.Length != 1 && Indices[0] + length - 1 != Indices[length - 1])
...{
MessageBox.Show(Page, "請選擇連續的項!");
return;
}
//將選中的上面一項未選中的值賦予臨時變量
text = lb_busspot.Items[Indices[0] - 1].Text;
value = lb_busspot.Items[Indices[0] - 1].Value;
for (int i = 0; i < length; i++)
...{
lb_busspot.Items[Indices[i] - 1].Text = lb_busspot.Items[Indices[i]].Text;
lb_busspot.Items[Indices[i] - 1].Value = lb_busspot.Items[Indices[i]].Value;
//保證被選中狀態
lb_busspot.Items[Indices[i] - 1].Selected = true;
lb_busspot.Items[Indices[i]].Selected = false;
}
//將選中的上面第一條未選中的值賦予到下面
lb_busspot.Items[Indices[0] + length - 1].Text = text;
lb_busspot.Items[Indices[0] + length - 1].Value = value;
}
protected void btn_down_Click(object sender, EventArgs e)
...{
if (lb_busspot.SelectedIndex == -1)
...{
return;
}
//獲得連續選中的項索引
int[] Indices = lb_busspot.GetSelectedIndices();
int length = Indices.Length;
string text;
string value;
//如果選擇的是最底下的項
if (Indices[length - 1] == lb_busspot.Items.Count - 1)
...{
return;
}
//判斷選擇多項時是否是連續的項
if (Indices.Length != 1 && Indices[0] + length - 1 != Indices[length - 1])
...{
MessageBox.Show(Page, "請選擇連續的項!");
return;
& //將選中的下面一項未選中的值賦予臨時變量
text = lb_busspot.Items[Indices[length - 1] + 1].Text;
value = lb_busspot.Items[Indices[length - 1] + 1].Value;
for (int i = length; i > 0; i--)
...{
lb_busspot.Items[Indices[i - 1] + 1].Text = lb_busspot.Items[Indices[i - 1]].Text;
lb_busspot.Items[Indices[i - 1] + 1].Value = lb_busspot.Items[Indices[i - 1]].Value;
//保證被選中狀態
lb_busspot.Items[Indices[i - 1] + 1].Selected = true;
lb_busspot.Items[Indices[i - 1]].Selected = false;
}
//將下面第一條未選中的項的值賦予到上面
lb_busspot.Items[Indices[0]].Text = text;
lb_busspot.Items[Indices[0]].Value = value;
}