page code
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Test._Default" %>
<%@ Register Assembly="DevExpress.Web.v12.2, Version=12.2.7.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" Namespace="DevExpress.Web.ASPxEditors" TagPrefix="dx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form" runat="server">
<div>
<dx:ASPxComboBox ID="cbxM" runat="server" ValueType="System.String" ValueField="ID">
<Columns>
<dx:ListBoxColumn FieldName="Name" Caption="名称" />
</Columns>
</dx:ASPxComboBox>
<dx:ASPxListBox ID="listBox" runat="server" ValueType="System.String" SelectionMode="CheckColumn" ValueField="ID" Height="500px" TextField="Name">
<Columns>
<dx:ListBoxColumn FieldName="Name" Caption="名称" />
</Columns>
</dx:ASPxListBox>
<dx:ASPxButton ID="btnTest" runat="server" Text="Test" OnClick="btnTest_Click"></dx:ASPxButton>
</div>
</form>
</body>
</html>
cs code
using DevExpress.Web.ASPxEditors;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Test
{
public partial class _Default : System.Web.UI.Page
{
TestEntities ctx = new TestEntities();
protected void Page_Load(object sender, EventArgs e)
{
this.listBox.DataSource = ctx.UnitType;
this.listBox.DataBind();
BindMaterial();
}
private void BindMaterial()
{
this.cbxM.DataSource = ctx.Material;
this.cbxM.DataBind();
}
protected void btnTest_Click(object sender, EventArgs e)
{
string unitStr = string.Empty;
foreach (ListEditItem item in listBox.Items)
{
if (item.Selected)
{
unitStr += item.Value + ",";
}
}
unitStr = unitStr.TrimEnd(',');
Mapping mapping = new Mapping();
mapping.MaterialReference.EntityKey = new System.Data.EntityKey("entities.User", "ID", userID);
}
}
}
However, we will get no selected items in the button click event function.
Try this
cs code
protected void Page_Init(object sender, EventArgs e)
{
this.listBox.DataSource = ctx.UnitType;
this.listBox.DataBind();
}
Great! It works fine.
