FormView.HeaderTemplate Property

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

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 user-defined content for the header row in a FormView control.

public:
 virtual property System::Web::UI::ITemplate ^ HeaderTemplate { System::Web::UI::ITemplate ^ get(); void set(System::Web::UI::ITemplate ^ value); };

[System.ComponentModel.Browsable(false)]
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)]
[System.Web.UI.TemplateContainer(typeof(System.Web.UI.WebControls.FormView))]
public virtual System.Web.UI.ITemplate HeaderTemplate { get; set; }

[<System.ComponentModel.Browsable(false)>]
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)>]
[<System.Web.UI.TemplateContainer(typeof(System.Web.UI.WebControls.FormView))>]
member this.HeaderTemplate : System.Web.UI.ITemplate with get, set

Public Overridable Property HeaderTemplate As ITemplate

Property Value

ITemplate

A ITemplate that contains the custom content for the header row. The default value is null, which indicates that this property is not set.

Attributes: BrowsableAttribute PersistenceModeAttribute TemplateContainerAttribute

Examples

The following example demonstrates how to use the HeaderTemplate property to define a custom template to render for the header row.


<%@ 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. You can define your own custom user interface (UI) for the header row by using the HeaderTemplate property. To specify a custom template for the header row, first place <HeaderTemplate> tags between the opening and closing tags of the FormView control. You can then list the contents of the template between the opening and closing <HeaderTemplate> tags. To control the style of the header row, use the HeaderStyle property. Alternatively, you can simply display text in the header row by setting the HeaderText property instead of this property.

Note

If both the HeaderText and HeaderTemplate properties are set, the HeaderTemplate property takes precedence.

Applies to

Delen via