BaseDataList.Controls 属性
定义
重要
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获取 ControlCollection 对象，它包含数据列表控件中的子控件的集合。
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.ControlCollectionPublic Overrides ReadOnly Property Controls As ControlCollection属性值
ControlCollection，它包含数据列表控件中的子控件的集合。
示例
下面的代码示例演示如何以编程方式向集合添加控件 Controls 。
<%@ 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>
注解
使用 Controls 集合管理数据列表控件中包含的子控件。 可以添加控件、删除控件或循环访问集合中的服务器控件。