asp.net中两个ListBox 左右互相移动,以及上移、下移

2016-12-30 09:56:32来源:oschina作者:深圳大道人点击
































//右移
protected void btnLeftToRight_Click(object sender, EventArgs e)
{
//定义中间动态存储
ArrayList arrRight = new ArrayList();
//读取左边listbox的item的选中项
foreach (ListItem item in this.leftListBox.Items)
{
if (item.Selected)
{
arrRight.Add(item);
}
}
//执行右移操作
foreach (ListItem item in arrRight)
{
this.rightListBox.Items.Add(item);
this.leftListBox.Items.Remove(item);
}
}
//左移
protected void btnRightToLeft_Click(object sender, EventArgs e)
{
ArrayList arrLeft = new ArrayList();
//读取右边listboxitem的选中项
foreach (ListItem item in this.rightListBox.Items)
{
if (item.Selected)
{
arrLeft.Add(item);
}
}
//执行左移操作
foreach (ListItem item in arrLeft)
{
this.leftListBox.Items.Add(item);
this.rightListBox.Items.Remove(item);
}
}
//上移
protected void btnRightUp_Click(object sender, EventArgs e)
{
try
{
if (rightListBox.SelectedIndex > 0)
{
int idx = rightListBox.SelectedIndex;
var SelectedItem = rightListBox.SelectedItem;
rightListBox.Items.Insert(rightListBox.SelectedIndex - 1, new ListItem(SelectedItem.Text, SelectedItem.Value));
rightListBox.Items.RemoveAt(rightListBox.SelectedIndex);
rightListBox.SelectedIndex = idx - 1;
}
}
catch (Exception)
{
Response.Write("<script language =javascript>alert('请选择元素!')</script>");
}
}
//下移
protected void btnRightDown_Click(object sender, EventArgs e)
{
try
{
if (rightListBox.SelectedIndex < rightListBox.Items.Count - 1)
{
int idx = rightListBox.SelectedIndex;
rightListBox.Items.Insert(rightListBox.SelectedIndex, rightListBox.Items[rightListBox.SelectedIndex + 1]);
rightListBox.Items.RemoveAt(rightListBox.SelectedIndex + 1);
rightListBox.SelectedIndex = idx + 1;
}
}
catch (Exception)
{
Response.Write("<script language =javascript>alert('请选择元素!')</script>");
}
}

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