[英]Copy ListItems from one ListBox to another
I am implenting some functionality on asp.net page such that: There are to listboxes side by side, left one is prepopulated and right one is empty. 我在asp.net页面上强加了某些功能,例如:并排显示列表框,左一个预填充,右一个为空。 Besides left listbox there is add button and besides right there is remove button.
除了左侧列表框之外,还有添加按钮,而右侧则有删除按钮。 I have written javascript code such that on Add button click the selected listItems from left listbox are moved to right listbox and vice-versa.
我已经编写了JavaScript代码,以便在“添加”按钮上单击从左侧列表框中选择的listItem,将其移到右侧列表框中,反之亦然。
It is as follows: 如下:
When I submit the form, in code-behind I am not able to retrive the newly moved values from right ListBox (I know its not posssible in this way). 当我提交表单时,在代码背后,我无法从正确的ListBox检索新移动的值(我知道这种方式是不可能的)。 How can I access the changes made with the javascript changes to the listboxes in the codebehind .
如何访问对JavaScript代码背后的列表框所做的更改 。
Any help appreciated. 任何帮助表示赞赏。
I think while you are loading the page contents inside Page_Load(),make sure that you are loading after checking whether is a post back request or not.Load the events if it is not a postback request. 我认为在加载Page_Load()中的页面内容时,请确保在检查是否为回发请求之后进行加载。如果不是回发请求,则加载事件。
ie :- 即:-
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
//load the contents of the page/listbox here.
}
}
<form id="form1" runat="server">
<div>
<select id="greet" name="greet" multiple="multiple">
<option>Mr</option>
<option>Mrs</option>
<option>Miss</option>
<option>Dr</option>
</select>
<asp:Button Text="Submit" runat="server" ID="btnSubmit"
OnClick="btnSubmit_Click" />
</div>
</form>
protected void btnSubmit_Click(object sender, EventArgs e)
{
string greets = Request["greet"];
}
I was able to view the selected items in the list 我能够查看列表中的选定项目
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