将选定的多个列表框项目的值存储在asp.net
[英]store selected value of multiple list box items in asp.net
问题描述
I have a listbox control data bound to a data source and I want to be able to get the value of each selected item so that I can use that information to form an insert query for another table. 
我有一个绑定到数据源的列表框控件数据，并且我希望能够获取每个选定项的值，以便可以使用该信息形成对另一个表的插入查询。 In other words be able to select a few items out of the returned list and get the selected value of each. 换句话说，能够从返回的列表中选择一些项目并获得每个项目的选定值。 I tried using a for each statement but came up with some strange numbers. 我尝试为每个语句使用a，但是想出了一些奇怪的数字。
2 个解决方案
解决方案1
2 2010-11-08 12:14:14
Here's an example with a list box allowing multiple items to be selected and a button which retrieves the selected items: 这是一个示例，其中有一个列表框允许选择多个项目，还有一个用于检索所选项目的按钮：
<%@ Page Title="Home Page" Language="C#" %>
<script type="text/C#" runat="server">
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
list.DataSource = Enumerable.Range(1, 5).Select(x => new { Id = x, Text = "item " + x });
list.DataValueField = "Id";
list.DataTextField = "Text";
list.DataBind();
}
}
protected void BtnOK_Click(object sender, EventArgs e)
{
ListItem[] selectedItems = list.Items
.Cast<ListItem>()
.Where(item => item.Selected)
.ToArray();
// TODO: use the selected items here
}
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="Form1" runat="server">
<asp:ListBox ID="list" runat="server" SelectionMode="Multiple" />
<asp:LinkButton ID="BtnOK" runat="server" OnClick="BtnOK_Click" Text="OK" />
</form>
</body>
</html>
解决方案2
1 已采纳 2010-11-08 21:22:47
I finally figured it out 我终于想通了
protected void Button1_Click(object sender, EventArgs e)
{
string msg = "";
foreach (ListItem li in ListBox_SubModel.Items)
{
if (li.Selected == true)
{
msg += "<br />" + li.Value + " is selected";
}
}
Label_SubModel.Text = msg;
}
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