FormView.HeaderRow Property
Definition
Important
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Gets the FormViewRow object that represents the header row in a FormView control.
public:
virtual property System::Web::UI::WebControls::FormViewRow ^ HeaderRow { System::Web::UI::WebControls::FormViewRow ^ get(); };[System.ComponentModel.Browsable(false)]
public virtual System.Web.UI.WebControls.FormViewRow HeaderRow { get; }[<System.ComponentModel.Browsable(false)>]
member this.HeaderRow : System.Web.UI.WebControls.FormViewRowPublic Overridable ReadOnly Property HeaderRow As FormViewRowProperty Value
A FormViewRow that represents the header row in a FormView control.
- Attributes
Examples
The following example demonstrates how to use the HeaderRow property to programmatically modify the properties of the header row during the ItemCreated event.
<%@ Page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void EmployeeFormView_ItemCreated(Object sender, EventArgs e)
{
// Use the HeaderRow property to retrieve the header row.
FormViewRow header = EmployeeFormView.HeaderRow;
// Retrieve the HeaderLabel Label control from the header row.
Label headerLabel = (Label)header.FindControl("HeaderLabel");
if(headerLabel != null)
{
// Display the current page number.
int currentPage = EmployeeFormView.PageIndex + 1;
headerLabel.Text = "Page " + currentPage.ToString();
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FormView HeaderTemplate Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>FormView HeaderTemplate Example</h3>
<asp:formview id="EmployeeFormView"
datasourceid="EmployeeSource"
allowpaging="true"
datakeynames="EmployeeID"
onitemcreated="EmployeeFormView_ItemCreated"
runat="server">
<headertemplate>
<table>
<tr>
<td>
<asp:image id="LogoImage"
imageurl="~/Images/LogoImage.jpg"
alternatetext="Our Logo"
runat="server"/>
</td>
<td>
<asp:label id="HeaderLabel"
runat="server"/>
</td>
</tr>
</table>
</headertemplate>
<headerstyle horizontalalign="Center"
forecolor="White"
backcolor="LightBlue"/>
<itemtemplate>
<table>
<tr>
<td>
<asp:image id="EmployeeImage"
imageurl='<%# Eval("PhotoPath") %>'
alternatetext='<%# Eval("LastName") %>'
runat="server"/>
</td>
<td>
<h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>
<%# Eval("Title") %>
</td>
</tr>
</table>
</itemtemplate>
<pagersettings position="Bottom"
mode="NextPrevious"/>
</asp:formview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="EmployeeSource"
selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</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">
<script runat="server">
Sub EmployeeFormView_ItemCreated(ByVal sender As Object, ByVal e As EventArgs)
' Use the HeaderRow property to retrieve the header row.
Dim header As FormViewRow = EmployeeFormView.HeaderRow
' Retrieve the HeaderLabel Label control from the header row.
Dim headerLabel As Label = CType(header.FindControl("HeaderLabel"), Label)
If headerLabel IsNot Nothing Then
' Display the current page number.
Dim currentPage As Integer = EmployeeFormView.PageIndex + 1
headerLabel.Text = "Page " & currentPage.ToString()
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FormView HeaderTemplate Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>FormView HeaderTemplate Example</h3>
<asp:formview id="EmployeeFormView"
datasourceid="EmployeeSource"
allowpaging="true"
datakeynames="EmployeeID"
onitemcreated="EmployeeFormView_ItemCreated"
runat="server">
<headertemplate>
<table>
<tr>
<td>
<asp:image id="LogoImage"
imageurl="~/Images/LogoImage.jpg"
alternatetext="Our Logo"
runat="server"/>
</td>
<td>
<asp:label id="HeaderLabel"
runat="server"/>
</td>
</tr>
</table>
</headertemplate>
<headerstyle horizontalalign="Center"
forecolor="White"
backcolor="LightBlue"/>
<itemtemplate>
<table>
<tr>
<td>
<asp:image id="EmployeeImage"
imageurl='<%# Eval("PhotoPath") %>'
alternatetext='<%# Eval("LastName") %>'
runat="server"/>
</td>
<td>
<h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>
<%# Eval("Title") %>
</td>
</tr>
</table>
</itemtemplate>
<pagersettings position="Bottom"
mode="NextPrevious"/>
</asp:formview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="EmployeeSource"
selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
Remarks
The header row is displayed at the top of the FormView control when the HeaderText or HeaderTemplate property is set. Use the HeaderRow property to programmatically access the FormViewRow object that represents the header row.
Note
The HeaderRow property is available only after the FormView control creates the header row in the ItemCreated event.
This property is commonly used when you need to programmatically manipulate the header row, for example, when adding custom content. Any modification to the HeaderRow property must be performed after the FormView control has been rendered; otherwise, the FormView control overwrites any changes.
Applies to
See also
Vertu í samstarfi við okkur á GitHub
Heimildina fyrir þetta efni er að finna á GitHub, þar sem þú getur líka búið til og farið yfir vandamál og sameinað beiðnir. Frekari upplýsingar er að finna í framlagshandbók okkar.
