通过

TemplateField.HeaderTemplate 属性

  • 参考

定义

命名空间:
System.Web.UI.WebControls
程序集:
System.Web.dll

获取或设置用于显示 TemplateField 对象的标头部分的模板。

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.IDataItemContainer))]
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.IDataItemContainer))>]
member this.HeaderTemplate : System.Web.UI.ITemplate with get, set
Public Overridable Property HeaderTemplate As ITemplate

属性值

ITemplate

一个实现了 ITemplate 的对象，该对象包含用于显示数据绑定控件中 TemplateField 的标头部分的模板。 默认值为 null，指示未设置此属性。

属性
BrowsableAttribute PersistenceModeAttribute TemplateContainerAttribute

示例

下面的代码示例演示如何使用HeaderTemplate属性为控件中GridView字段列的TemplateField标题部分创建自定义模板。 该模板显示一个复选框，允许用户显示或隐藏控件的 GridView 行。


<%@ 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 SelectAllCheckBox_CheckedChanged(Object sender, EventArgs e)
  {
  
    // Get the CheckBox control that indicates whether to show or 
    // hide the rows in the GridView control. The sender parameter
    // contains the control that raised the event.
    CheckBox showCheckBox = (CheckBox)sender;
    
    // Show or hide the rows of the GridView control based
    // on the check box value selected by the user.
    if (showCheckBox.Checked)
    {
      ShowRows (true);
    }
    else
    {
      ShowRows (false);
    }
    
  }
  
  void ShowRows(bool show)
  {
    // Iterate through the Rows collection of the GridView
    // control and show or hide the rows based on the value
    // of the show parameter.
    foreach(GridViewRow row in AuthorsGridView.Rows)
    {
      row.Visible = show;
    }
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TemplateField HeaderTemplate Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>TemplateField HeaderTemplate Example</h3>

      <!-- Populate the Columns collection declaratively. -->
      <!-- Create a TemplateField column field that contains   -->
      <!-- a CheckBox control in the header section to show or -->
      <!-- hide the rows in the GridView control.              -->
      <asp:gridview id="AuthorsGridView" 
        datasourceid="AuthorsSqlDataSource" 
        autogeneratecolumns="False"
        width="250" 
        runat="server">
                
        <columns>
          <asp:templatefield>
            <headerstyle backcolor="Navy"
              forecolor="White"/>
            <itemtemplate>
              <%#Eval("au_fname")%>
              <%#Eval("au_lname")%>
            </itemtemplate>
            <headertemplate>
              <asp:checkbox id="ShowAllCheckBox"
                text="Show All"
                checked="True" 
                autopostback="true"
                oncheckedchanged="SelectAllCheckBox_CheckedChanged"  
                runat="server"/>
            </headertemplate>
          </asp:templatefield>                      
        </columns>
                
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects -->
      <!-- to the Pubs sample database.                        -->
      <asp:sqldatasource id="AuthorsSqlDataSource"  
        selectcommand="SELECT [au_id], [au_lname], [au_fname], [address], [city], [state], [zip], [contract] FROM [authors]"
        connectionstring="server=localhost;database=pubs;integrated security=SSPI"
        runat="server">
      </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">
<script runat="server">

  Sub SelectAllCheckBox_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs)
  
    ' Get the CheckBox control that indicates whether to show or 
    ' hide the rows in the GridView control. The sender parameter
    ' contains the control that raised the event.
    Dim showCheckBox As CheckBox = CType(sender, CheckBox)
    
    ' Show or hide the rows of the GridView control based
    ' on the check box value selected by the user.
    If showCheckBox.Checked Then

      ShowRows(True)

    Else

      ShowRows(False)
    
    End If
    
  End Sub
  
  Sub ShowRows(ByVal show As Boolean)
    
    ' Iterate through the Rows collection of the GridView
    ' control and show or hide the rows based on the value
    ' of the show parameter.
    Dim row As GridViewRow
    For Each row In AuthorsGridView.Rows
    
      row.Visible = show
    
    Next
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TemplateField HeaderTemplate Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>TemplateField HeaderTemplate Example</h3>

      <!-- Populate the Columns collection declaratively. -->
      <!-- Create a TemplateField column field that contains   -->
      <!-- a CheckBox control in the header section to show or -->
      <!-- hide the rows in the GridView control.              -->
      <asp:gridview id="AuthorsGridView" 
        datasourceid="AuthorsSqlDataSource" 
        autogeneratecolumns="False"
        width="250" 
        runat="server">
                
        <columns>
          <asp:templatefield>
            <headerstyle backcolor="Navy"
              forecolor="White"/>
            <itemtemplate>
              <%#Eval("au_fname")%>
              <%#Eval("au_lname")%>
            </itemtemplate>
            <headertemplate>
              <asp:checkbox id="ShowAllCheckBox"
                text="Show All"
                checked="True" 
                autopostback="true"
                oncheckedchanged="SelectAllCheckBox_CheckedChanged"  
                runat="server"/>
            </headertemplate>
          </asp:templatefield>                      
        </columns>
                
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects -->
      <!-- to the Pubs sample database.                        -->
      <asp:sqldatasource id="AuthorsSqlDataSource"  
        selectcommand="SELECT [au_id], [au_lname], [au_fname], [address], [city], [state], [zip], [contract] FROM [authors]"
        connectionstring="server=localhost;database=pubs;integrated security=SSPI"
        runat="server">
      </asp:sqldatasource>
            
    </form>
  </body>
</html>

注解

使用 HeaderTemplate 属性指定为对象的标头节 TemplateField 显示的自定义内容。 通过创建一个模板来定义内容，该模板指定标头节的呈现方式。

若要指定模板，请先在元素的<TemplateField>开始标记和结束标记之间打开和结束<HeaderTemplate>标记。 接下来，在开始标记和结束 <HeaderTemplate> 标记之间添加自定义内容。 内容可以像纯文本或更复杂的 (在模板中嵌入其他控件（例如) ）一样简单。

若要以编程方式访问模板中定义的控件，请先确定数据绑定控件中的哪个 TableCell 对象包含该控件。 接下来，使用 Controls 对象的集合 TableCell 来访问控件。 如果控件指定ID了属性，还可以使用FindControl对象的方法TableCell查找控件。

适用于

另请参阅