ASPxNavBar.CollapseImage Property
Gets an image a click on which collapses a group within the navbar.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v24.1.dll
NuGet Package: DevExpress.Web
Declaration
Property Value
| Type | Description |
|---|---|
| ImageProperties | An ImageProperties object that contains image settings. |
Remarks
The CollapseImage property provides access to the settings that define an image for the expand buttons displayed within the navbar’s expanded groups. A click on this image collapses the corresponding group.
A specific collapse image can be associated with a particular group by using its NavBarGroup.CollapseImage property.
Example
The example demonstrates how to create the ASPxNavBar groups and items at runtime to create a FAQ page.
Data can be obtained from any type of a datasource. For example, the data can be obtained from the Access database file using the OLE DB provider.The sample was built from the kindly provided How to use the ASPxNavBar with an Access or SQL datasource suggestion article, containing the URL to the tutorial video file.
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>How to create the FAQ Page using the ASPxNavBar</title>
<style type="text/css">
.heading {
font-size: large;
color: Blue;
}
.Question {
color: Gray;
font-size: 11pt;
}
.Question img {
vertical-align: middle;
}
.Question span {
vertical-align: middle !important;
}
.Answer {
font-size: 11pt;
padding-left: 35px !important;
padding-top: 8px;
padding-bottom: 8px;
}
.defaultStyle {
padding-left: 0px;
list-style-type: none;
margin: 0px;
}
.groupPadding {
padding-left:0px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div style="min-height: 500px;">
<div class="heading">
Frequently Asked Questions
</div>
<div style="padding-left: 10px; padding-top: 10px;">
<dx:ASPxNavBar ID="navFAQ" runat="server" ExpandButtonPosition="Left"
AutoCollapse="True" GroupSpacing="5px" EncodeHtml="False" CssPostfix="None" CssClass="defaultStyle">
<GroupHeaderStyle CssClass="Question" ImageSpacing="8px">
</GroupHeaderStyle>
<CollapseImage Url="~/Images/nbCollapse.png">
</CollapseImage>
<ExpandImage Url="~/Images/nbExpand.png">
</ExpandImage>
<ItemStyle CssClass="Answer defaultStyle" />
<GroupContentStyle CssClass="groupPadding"></GroupContentStyle>
</dx:ASPxNavBar>
</div>
</div>
</form>
</body>
</html>
using System;
using System.Configuration;
using System.Data.OleDb;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, System.EventArgs e) {
if (!IsPostBack) {
Load_FAQ();
}
}
public void Load_FAQ() {
string SQL = "SELECT [Sort], [Question], [Answer] FROM [FAQ] ORDER BY [Sort], [Question]";
string Question = null;
string Answer = null;
int i = 0;
OleDbConnection conn = new OleDbConnection(ConfigurationManager.ConnectionStrings["DB_Conn_FAQ"].ConnectionString);
OleDbCommand SelectCommand = new OleDbCommand(SQL, conn);
try {
conn.Open();
OleDbDataReader Reader = SelectCommand.ExecuteReader();
while (Reader.Read()) {
if (Reader.HasRows) {
Question = Reader["Question"].ToString();
Answer = Reader["Answer"].ToString();
navFAQ.Groups.Add(Question);
navFAQ.Groups[i].Items.Add(Answer);
}
i += 1;
}
} catch (Exception ex) {
} finally {
conn.Close();
conn.Dispose();
SelectCommand.Dispose();
}
}
}