vs2005制做左右上下移动的Listbox ( asp.net , C#)

 


制作可上下左右移动的 ListBox:







方法:




1.新建页面,拖放如下控件: 两个ListBox ,6个button,样式如下




 




各个button的功能




>> 左移




<< 右移




↑上移




↓下移




C全部清空




>> 代码如下:




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>");


        }


    }




<<代码如下:




 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>");


        }


    }




↑代码如下:




 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>");


        }


    }




↓代码如下:




 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代码如下:




protected void Button6_Click(object sender, EventArgs e)




    ...{


        this.ListBox2.Items.Clear();


    }




最后显示如图: