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: