ListView.GroupPlaceholderID Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets or sets the ID for the group placeholder in a ListView control.
public:
virtual property System::String ^ GroupPlaceholderID { System::String ^ get(); void set(System::String ^ value); };
public virtual string GroupPlaceholderID { get; set; }
member this.GroupPlaceholderID : string with get, set
Public Overridable Property GroupPlaceholderID As String
Property Value
The ID for the group placeholder in a ListView control. The default is "groupPlaceholder".
Exceptions
The specified ID is null
or an empty string.
Examples
The following example shows how to use the GroupPlaceholderID property to specify a different ID for the group placeholder of the ListView control.
<%@ Page language="C#" %>
<!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 id="Head1" runat="server">
<title>ListView GroupContainerID and ItemContainerID Example</title>
<style type="text/css">
body
{
font: 10pt Trebuchet MS, Arial, Tahoma;
text-align: center;
}
th { background: #b7cfff; }
.item
{
border: 1px dashed #a4cbf4;
background: white;
min-height: 19px;
width: 33%;
}
.alternatingItem
{
border: solid 1px #a4cbf4;
background: #edf5fd;
width: 33%;
min-height: 19px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<h3>ListView GroupContainerID and ItemContainerID Example</h3>
<asp:ListView ID="ContactsListView"
DataSourceID="ContactsDataSource"
GroupItemCount="3"
GroupPlaceholderID="ContactRowContainer"
ItemPlaceholderID="ContactItemContainer"
runat="server">
<LayoutTemplate>
<table cellpadding="4" width="640px" runat="server" id="tblContacts">
<tr runat="server">
<th colspan="3" runat="server">Contacts</th>
</tr>
<tr runat="server" id="ContactRowContainer" />
</table>
<asp:DataPager ID="ContactsDataPager" runat="server" PageSize="30">
<Fields>
<asp:NumericPagerField ButtonCount="10" />
</Fields>
</asp:DataPager>
</LayoutTemplate>
<GroupTemplate>
<tr runat="server" id="ContactRow">
<td runat="server" id="ContactItemContainer" />
</tr>
</GroupTemplate>
<ItemTemplate>
<td class="item" runat="server">
<asp:Label ID="NameLabel" runat="server"
Text='<%# Eval("LastName") + ", " + Eval("FirstName")%>' />
</td>
</ItemTemplate>
<AlternatingItemTemplate>
<td class="alternatingItem" runat="server">
<asp:Label ID="NameLabel" runat="server"
Text='<%# Eval("LastName") + ", " + Eval("FirstName")%>' />
</td>
</AlternatingItemTemplate>
</asp:ListView>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the AdventureWorks sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:SqlDataSource ID="ContactsDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT [FirstName], [LastName]
FROM Person.Contact ORDER BY [LastName], [FirstName] ">
</asp:SqlDataSource>
</form>
</body>
</html>
<%@ Page language="VB" %>
<!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 id="Head1" runat="server">
<title>ListView GroupContainerID and ItemContainerID Example</title>
<style type="text/css">
body
{
font: 10pt Trebuchet MS, Arial, Tahoma;
text-align: center;
}
th { background: #b7cfff; }
.item
{
border: 1px dashed #a4cbf4;
background: white;
min-height: 19px;
width: 33%;
}
.alternatingItem
{
border: solid 1px #a4cbf4;
background: #edf5fd;
width: 33%;
min-height: 19px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<h3>ListView GroupContainerID and ItemContainerID Example</h3>
<asp:ListView ID="ContactsListView"
DataSourceID="ContactsDataSource"
GroupItemCount="3"
GroupPlaceholderID="ContactRowContainer"
ItemPlaceholderID="ContactItemContainer"
runat="server">
<LayoutTemplate>
<table cellpadding="4" width="640px" runat="server" id="tblContacts">
<tr id="Tr1" runat="server">
<th id="Th1" colspan="3" runat="server">Contacts</th>
</tr>
<tr runat="server" id="ContactRowContainer" />
</table>
<asp:DataPager ID="ContactsDataPager" runat="server" PageSize="30">
<Fields>
<asp:NumericPagerField ButtonCount="10" />
</Fields>
</asp:DataPager>
</LayoutTemplate>
<GroupTemplate>
<tr runat="server" id="ContactRow">
<td runat="server" id="ContactItemContainer" />
</tr>
</GroupTemplate>
<ItemTemplate>
<td id="Td1" class="item" runat="server">
<asp:Label ID="NameLabel" runat="server"
Text='<%# Eval("LastName") & ", " & Eval("FirstName")%>' />
</td>
</ItemTemplate>
<AlternatingItemTemplate>
<td id="Td2" class="alternatingItem" runat="server">
<asp:Label ID="NameLabel" runat="server"
Text='<%# Eval("LastName") & ", " & Eval("FirstName")%>' />
</td>
</AlternatingItemTemplate>
</asp:ListView>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the AdventureWorks sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:SqlDataSource ID="ContactsDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT [FirstName], [LastName]
FROM Person.Contact ORDER BY [LastName], [FirstName] ">
</asp:SqlDataSource>
</form>
</body>
</html>
Remarks
Use the GroupPlaceholderID property to specify an ID for the group placeholder. The group placeholder is the control that you add to the LayoutTemplate template when you are using groups to represent where the group will be rendered.
Applies to
See also
.NET
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