BaseDataList.Controls Egenskap

Definition

Namnområde:
System.Web.UI.WebControls
Sammansättning:
System.Web.dll

Hämtar ett ControlCollection objekt som innehåller en samling underordnade kontroller i en datalistningskontroll.

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

Egenskapsvärde

ControlCollection

En ControlCollection som innehåller en samling underordnade kontroller i en datalistningskontroll.

Exempel

I följande kodexempel visas hur du programmatiskt lägger till en kontroll i Controls samlingen.


<%@ 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>

Kommentarer

Använd samlingen Controls för att hantera de underordnade kontrollerna som finns i en datalistningskontroll. Du kan lägga till kontroller, ta bort kontroller eller iterera via serverkontrollerna i samlingen.

Gäller för

Se även