TemplateColumn.HeaderTemplate Özellik
Tanım
Önemli
Bazı bilgiler ürünün ön sürümüyle ilgilidir ve sürüm öncesinde önemli değişiklikler yapılmış olabilir. Burada verilen bilgilerle ilgili olarak Microsoft açık veya zımni hiçbir garanti vermez.
Nesnenin başlık bölümünü TemplateColumn görüntülemek için şablonu alır veya ayarlar.
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.DataGridItem))]
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.DataGridItem))>]
member this.HeaderTemplate : System.Web.UI.ITemplate with get, setPublic Overridable Property HeaderTemplate As ITemplateÖzellik Değeri
ITemplateöğesinin başlık bölümünü TemplateColumngörüntülemek için şablonu içeren bir -implemented nesnesi. Varsayılan değer, nullbu özelliğin ayarlanmadığını gösteren değeridir.
- Öznitelikler
Örnekler
Aşağıdaki kod örneği, özelliğin nesnedeki HeaderTemplate başlık bölümünün TemplateColumn görünümünü denetlemek için nasıl kullanılacağını gösterir.
<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<!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" >
<script runat="server">
DataTable Store = new DataTable();
DataView StoreView;
void Page_Load(Object sender, EventArgs e)
{
if(Session["StoreData"] == null)
{
DataRow dr;
Store = new DataTable();
Store.Columns.Add(new DataColumn("Tax", typeof(String)));
Store.Columns.Add(new DataColumn("Item", typeof(String)));
Store.Columns.Add(new DataColumn("Price", typeof(String)));
Session["StoreData"] = Store;
// Create sample data.
for (int i = 1; i <= 4; i++)
{
dr = Store.NewRow();
dr[0] = "0.0%";
dr[1] = "Item " + i.ToString();
dr[2] = (1.23 * (i + 1)).ToString();
Store.Rows.Add(dr);
}
}
else
Store = (DataTable)Session["StoreData"];
StoreView = new DataView(Store);
StoreView.Sort="Item";
if(!IsPostBack)
BindGrid();
}
void MyDataGrid_Edit(Object sender, DataGridCommandEventArgs e)
{
MyDataGrid.EditItemIndex = e.Item.ItemIndex;
BindGrid();
}
void MyDataGrid_Cancel(Object sender, DataGridCommandEventArgs e)
{
MyDataGrid.EditItemIndex = -1;
BindGrid();
}
void MyDataGrid_Update(Object sender, DataGridCommandEventArgs e)
{
// Get the text box that contains the price to edit.
// For bound columns the edited value is stored in a text box.
// The text box is the first control in the Controls collection.
TextBox priceText = (TextBox)e.Item.Cells[3].Controls[0];
// Get the check box that indicates whether to include tax from the
// TemplateColumn. Notice that in this case, the check box control is
// second control in the Controls collection.
CheckBox taxCheck = (CheckBox)e.Item.Cells[2].Controls[1];
String item = e.Item.Cells[1].Text;
String price = priceText.Text;
DataRow dr;
// With a database, use an update command. Since the data source is
// an in-memory DataTable, delete the old row and replace it with a new one.
// Remove old entry.
StoreView.RowFilter = "Item='" + item + "'";
if (StoreView.Count > 0)
StoreView.Delete(0);
StoreView.RowFilter = "";
// Add new entry.
dr = Store.NewRow();
if (taxCheck.Checked)
dr[0] = "8.6%";
else
dr[0] = "0.0%";
dr[1] = item;
dr[2] = price;
Store.Rows.Add(dr);
MyDataGrid.EditItemIndex = -1;
BindGrid();
}
void BindGrid()
{
MyDataGrid.DataSource = StoreView;
MyDataGrid.DataBind();
}
</script>
<head runat="server">
<title>TemplateColumn Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>TemplateColumn Example</h3>
<asp:DataGrid id="MyDataGrid" runat="server"
BorderColor="black"
CellPadding="2"
OnEditCommand="MyDataGrid_Edit"
OnCancelCommand="MyDataGrid_Cancel"
OnUpdateCommand="MyDataGrid_Update"
ShowFooter="True"
AutoGenerateColumns="false">
<Columns>
<asp:EditCommandColumn
EditText="Edit"
CancelText="Cancel"
UpdateText="Update"
ItemStyle-Wrap="false"
HeaderText="Edit Controls"/>
<asp:BoundColumn HeaderText="Description"
ReadOnly="true"
DataField="Item"/>
<asp:TemplateColumn>
<HeaderTemplate>
<b> Tax </b>
</HeaderTemplate>
<ItemTemplate>
<asp:Label
Text='<%# DataBinder.Eval(Container.DataItem, "Tax") %>'
runat="server"/>
</ItemTemplate>
<EditItemTemplate>
<asp:CheckBox
Text="Taxable"
runat="server"/>
</EditItemTemplate>
<FooterTemplate>
<asp:HyperLink id="HyperLink1"
Text="Microsoft"
NavigateUrl="http://www.microsoft.com"
runat="server"/>
</FooterTemplate>
</asp:TemplateColumn>
<asp:BoundColumn HeaderText="Price"
DataField="Price"/>
</Columns>
</asp:DataGrid>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<!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" >
<script runat="server">
Private Store As DataTable = New DataTable()
Private StoreView As DataView
Sub Page_Load(sender As Object, e As EventArgs)
If IsNothing(Session("StoreData")) Then
Dim dr As DataRow
Dim i As Integer
Store = New DataTable()
Store.Columns.Add(New DataColumn("Tax", GetType(String)))
Store.Columns.Add(New DataColumn("Item", GetType(String)))
Store.Columns.Add(New DataColumn("Price", GetType(String)))
Session("StoreData") = Store
' Create sample data.
For i = 1 to 4
dr = Store.NewRow()
dr(0) = "0.0%"
dr(1) = "Item " & i.ToString()
dr(2) = (1.23 * (i + 1)).ToString()
Store.Rows.Add(dr)
Next i
Else
Store = Session("StoreData")
End If
StoreView = New DataView(Store)
StoreView.Sort="Item"
If Not IsPostBack Then
BindGrid()
End If
End Sub
Sub MyDataGrid_Edit(sender As Object, e As DataGridCommandEventArgs)
MyDataGrid.EditItemIndex = e.Item.ItemIndex
BindGrid()
End Sub
Sub MyDataGrid_Cancel(sender As Object, e As DataGridCommandEventArgs)
MyDataGrid.EditItemIndex = -1
BindGrid()
End Sub
Sub MyDataGrid_Update(sender As Object, e As DataGridCommandEventArgs)
' Get the text box that contains the price to edit.
' For bound columns the edited value is stored in a text box.
' The text box is the first control in the Controls collection.
Dim priceText As TextBox = e.Item.Cells(3).Controls(0)
' Get the check box that indicates whether to include tax from the
' TemplateColumn. Notice that in this case, the check box control is
' second control in the Controls collection.
Dim taxCheck As CheckBox = e.Item.Cells(2).Controls(1)
Dim item As String = e.Item.Cells(1).Text
Dim price As String = priceText.Text
Dim dr As DataRow
' With a database, use an update command. Since the data source is
' an in-memory DataTable, delete the old row and replace it with a new one.
' Remove old entry.
StoreView.RowFilter = "Item='" & item & "'"
If StoreView.Count > 0 Then
StoreView.Delete(0)
End If
StoreView.RowFilter = ""
' Add new entry.
dr = Store.NewRow()
If taxCheck.Checked Then
dr(0) = "8.6%"
Else
dr(0) = "0.0%"
End If
dr(1) = item
dr(2) = price
Store.Rows.Add(dr)
MyDataGrid.EditItemIndex = -1
BindGrid()
End Sub
Sub BindGrid()
MyDataGrid.DataSource = StoreView
MyDataGrid.DataBind()
End Sub
</script>
<head runat="server">
<title>TemplateColumn Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>TemplateColumn Example</h3>
<asp:DataGrid id="MyDataGrid" runat="server"
BorderColor="black"
CellPadding="2"
OnEditCommand="MyDataGrid_Edit"
OnCancelCommand="MyDataGrid_Cancel"
OnUpdateCommand="MyDataGrid_Update"
ShowFooter="True"
AutoGenerateColumns="false">
<Columns>
<asp:EditCommandColumn
EditText="Edit"
CancelText="Cancel"
UpdateText="Update"
ItemStyle-Wrap="false"
HeaderText="Edit Controls"/>
<asp:BoundColumn HeaderText="Description"
ReadOnly="true"
DataField="Item"/>
<asp:TemplateColumn>
<HeaderTemplate>
<b> Tax </b>
</HeaderTemplate>
<ItemTemplate>
<asp:Label
Text='<%# DataBinder.Eval(Container.DataItem, "Tax") %>'
runat="server"/>
</ItemTemplate>
<EditItemTemplate>
<asp:CheckBox
Text="Taxable"
runat="server"/>
</EditItemTemplate>
<FooterTemplate>
<asp:HyperLink id="HyperLink1"
Text="Microsoft"
NavigateUrl="http://www.microsoft.com"
runat="server"/>
</FooterTemplate>
</asp:TemplateColumn>
<asp:BoundColumn HeaderText="Price"
DataField="Price"/>
</Columns>
</asp:DataGrid>
</form>
</body>
</html>
Açıklamalar
nesnesindeki HeaderTemplate başlık bölümünün TemplateColumn görünümünü denetlemek için özelliğini kullanın. Görünüm, öğenin sütunda nasıl işlendiğini tanımlayan bir şablon oluşturularak belirtilir. Düzenleme için seçilen öğe için bir şablon belirtmek için, önce öğenin açma ve kapatma etiketleri arasına açma ve kapatma <HeaderTemplate> etiketleri yerleştirin <TemplateColumn> . Ardından, öğenin açılış ve kapanış <HeaderTemplate> etiketleri arasındaki görünümünü denetleyebilen içeriği listeleyebilirsiniz. İçerik düz metin kadar basit olabilir veya şablona başka denetimler eklenerek daha karmaşık hale getirilebilir.