vs2005製做左右上下移動的Listbox ( asp.net , C#)

 

製作可上下左右移動的 ListBox:

方法:

1.新建頁面,拖放如下控件: 兩個ListBox ,6個button,樣式如下

 

各個button的功能

>> 左移

<< 右移

↑上移

↓下移

C全部清空

>> 代碼如下:

protected void Button1_Click(object sender, EventArgs e)
    ...{
        try
        ...{
            this.ListBox2.Items.Add(this.ListBox1.SelectedItem.Text.ToString());
        }
        catch (Exception)
        ...{
           // this.Response.Write("<script language=javascript>alert('Please select some items before you click it!');history.go(-1)</script>");
        }
    }

<<代碼如下:

 protected void Button2_Click(object sender, EventArgs e)
    ...{
        try
        ...{
            this.ListBox2.Items.Remove(this.ListBox2.SelectedItem.Text.ToString());
        }
        catch (Exception)
        ...{
            //this.Response.Write("<script language=javascript>alert('Please select some items before you click it!');history.go(-1)</script>");
        }
    }

↑代碼如下:

 protected void Button4_Click(object sender, EventArgs e)
    ...{
        try
        ...{
            int i = this.ListBox2.SelectedIndex;
            int j = this.ListBox2.Items.Count;
            if ((j > i) && (i != 0))
            ...{
                string sitem = this.ListBox2.SelectedItem.Text.ToString();
                this.ListBox2.Items.RemoveAt(i);
                this.ListBox2.Items.Insert(i - 1, sitem);
                this.ListBox2.SelectedIndex = i - 1;

            }
        }
        catch (Exception)
        ...{
            //this.Response.Write("<script language=javascript>alert('Please select some items before you click it!');history.go(-1)</script>");
        }
    }

↓代碼如下:

 protected void Button3_Click(object sender, EventArgs e)
    ...{
        try
        ...{
            int i = this.ListBox2.SelectedIndex;
            int j = this.ListBox2.Items.Count;
            if ((j > i) && (i != j - 1))
            ...{
                string sitem = this.ListBox2.SelectedItem.Text.ToString();
                this.ListBox2.Items.RemoveAt(i);
                this.ListBox2.Items.Insert(i + 1, sitem);
                this.ListBox2.SelectedIndex = i + 1;

            }
        }
        catch (Exception)
        ...{
            //this.Response.Write("<script language=javascript>alert('Please select some items before you click it!');history.go(-1)</script>");

        }
    }

C代碼如下:

protected void Button6_Click(object sender, EventArgs e)
    ...{
        this.ListBox2.Items.Clear();
    }

最後顯示如圖: