如何将值从一个列表框移到另一个列表框? [英] How to shift a value from one listbox to another listbox?
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问题描述
我有一个网页,我想将值从一个列表框移动到另一个列表中.我成功地将值从一个列表框移动到另一个列表中,但问题是当我运行代码时列表框为空.我以前的值不是显示在列表框中.
请提出我做错了的事情.
我的代码是:
I have a webpage in which i want to move value from one listbox to another.I am successful to moving value from one listbox to another but the problem is when i run the code then listbox is empty.My previous value is not shown in the listbox.
Please suggest something where i have done mistake.
My code is:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
public partial class Move_value_from_one_listbox_to_another_listbox : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{ }
}
protected void button1_Click(object sender, EventArgs e)
{
if (Textbox1.Text == "")
{
return;
}
ListItem item = new ListItem();
item.Value = Textbox1.Text;
item.Text = Textbox1.Text;
listbox1.Items.Add(item);
Textbox1.Text = "";
}
protected void Buttonfrom_Click(object sender, EventArgs e)
{
//if (Listboxto.SelectedIndex == -1)
//{
// return;
//}
ListItem item = new ListItem();
item.Value = Listboxto.SelectedItem.Value;
item.Text = Listboxto.SelectedItem.Text;
listbox1.Items.Add(item);
Listboxto.Items.Remove(item);
}
protected void buttonto_Click(object sender, EventArgs e)
{
if (listbox1.SelectedIndex == -1)
{
return;
}
ListItem item = new ListItem();
item.Value = listbox1.SelectedItem.Value;
item.Text = listbox1.SelectedItem.Text;
Listboxto.Items.Add(item);
listbox1.Items.Remove(item);
}
}
推荐答案
为您的Web应用程序使用循环语句,并使用按钮将您的项目注册到另一个列表框中.
循环语句必须在按钮button_click中
use a looping statement for your web application and use a button to enlist your items to another list box.
looping statements must be inside the function button_click
HI,
请参考此
如何将列表框项目移动到另一个C#中的列表框. [
REFER THIS
How to Move List Box Items to another List Box in C#.[^]
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