BaseDataList.Controls Eigenschaft

  • Referenz

Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Ruft ein ControlCollection-Objekt ab, das eine Auflistung von untergeordneten Steuerelementen eines Datenauflistungssteuerelements enthält.

public:
 virtual property System::Web::UI::ControlCollection ^ Controls { System::Web::UI::ControlCollection ^ get(); };
public override System.Web.UI.ControlCollection Controls { get; }
member this.Controls : System.Web.UI.ControlCollection
Public Overrides ReadOnly Property Controls As ControlCollection

Eigenschaftswert

ControlCollection

Eine ControlCollection, die eine Auflistung von untergeordneten Steuerelementen eines Datenauflistungssteuerelements enthält.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie sie der Auflistung programmgesteuert ein Steuerelement Controls hinzufügen.


<%@ 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">
 
      ICollection CreateDataSource() 
      {
         // Create sample data for the DataGrid control.
         DataTable dt = new DataTable();
         DataRow dr;
 
         // Define columns for the data source.
         dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
         dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
         dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
 
         // Populate data source with sample values.
         for (int i = 0; i < 9; i++) 
         {
            dr = dt.NewRow();
 
            dr[0] = i;
            dr[1] = "Item " + i.ToString();
            dr[2] = 1.23 * (i + 1);
 
            dt.Rows.Add(dr);
         }
 
         DataView dv = new DataView(dt);
         return dv;
      }
 
      void Page_Load(Object sender, EventArgs e) 
      {
 
         // Bind data to the DataGrid control only when the page first loads.
         if (!IsPostBack) 
         {
            ItemsGrid.DataSource= CreateDataSource();
            ItemsGrid.DataBind();
         }

         // Create a Label control to display the total number of items 
         // displayed in the DataGrid.
         Label myLabel = new Label();
         myLabel.Text = "<br /><br /><b>Total Number of Items: " + ItemsGrid.Items.Count.ToString() + "</b>";
         myLabel.ID = "SummaryLabel";

         // Add the Label control to the Controls collection of the DataGrid.
         ItemsGrid.Controls.Add(myLabel);

      }

   </script>
 
<head runat="server">
    <title>BaseDataList Controls Example</title>
</head>
<body>
 
   <form id="form1" runat="server">
 
      <h3>BaseDataList Controls Example</h3>
 
      <b>Product List</b>
 
      <asp:DataGrid id="ItemsGrid"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           AutoGenerateColumns="True"
           runat="server">

         <HeaderStyle BackColor="#00aaaa">
         </HeaderStyle>
 
      </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">
 
      Function CreateDataSource() As ICollection 
      
         ' Create sample data for the DataGrid control.
         Dim dt As DataTable = New DataTable()
         Dim dr As DataRow
 
         ' Define the columns of the table.
         dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
         dt.Columns.Add(New DataColumn("StringValue", GetType(string)))
         dt.Columns.Add(New DataColumn("CurrencyValue", GetType(double)))
 
         ' Populate the table with sample values.
         Dim i As Integer

         For i = 0 to 8 
        
            dr = dt.NewRow()
 
            dr(0) = i
            dr(1) = "Item " & i.ToString()
            dr(2) = 1.23 * (i + 1)
 
            dt.Rows.Add(dr)

         Next i
 
         Dim dv As DataView = New DataView(dt)
         Return dv

      End Function
 
      Sub Page_Load(sender As Object, e As EventArgs) 
 
         ' Load sample data only once when the page is first loaded.
         If Not IsPostBack Then 
  
            ItemsGrid.DataSource = CreateDataSource()
            ItemsGrid.DataBind()

         End If

         ' Create a Label control to display the total number of items 
         ' displayed in the DataGrid.
         Dim myLabel As Label = New Label()
         myLabel.Text = "<br /><br /><b>Total Number of Items: " & ItemsGrid.Items.Count.ToString() & "</b>"
         myLabel.ID = "SummaryLabel"

         ' Add the Label control to the Controls collection of the DataGrid.
         ItemsGrid.Controls.Add(myLabel)

      End Sub

   </script>
 
<head runat="server">
    <title>BaseDataList Controls Example</title>
</head>
<body>
 
   <form id="form1" runat="server">
 
      <h3>BaseDataList Controls Example</h3>
 
      <b>Product List</b>
 
      <asp:DataGrid id="ItemsGrid"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           AutoGenerateColumns="True"
           runat="server">

         <HeaderStyle BackColor="#00aaaa">
         </HeaderStyle>
 
      </asp:DataGrid>

   </form>
 
</body>
</html>

Hinweise

Verwenden Sie die Auflistung, um die untergeordneten Steuerelemente zu verwalten, die Controls in einem Datenlistensteuerelement enthalten sind. Sie können Steuerelemente hinzufügen, Steuerelemente entfernen oder über die Serversteuerelemente in der Auflistung iterieren.

Gilt für

Siehe auch