BoundColumn.DataField-Eigenschaft
Ruft den Namen des Felds aus der Datenquelle ab, das an diese BoundColumn gebunden werden soll, oder legt diesen fest.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)
Syntax
'Declaration
Public Overridable Property DataField As String
'Usage
Dim instance As BoundColumn
Dim value As String
value = instance.DataField
instance.DataField = value
public virtual string DataField { get; set; }
public:
virtual property String^ DataField {
String^ get ();
void set (String^ value);
}
/** @property */
public String get_DataField ()
/** @property */
public void set_DataField (String value)
public function get DataField () : String
public function set DataField (value : String)
Eigenschaftenwert
Der Name des Felds, das an BoundColumn gebunden werden soll. Der Standardwert ist String.Empty.
Hinweise
Mithilfe der DataField-Eigenschaft wird das Feld angegeben, das an BoundColumn gebunden werden soll.
Beispiel
Das folgende Beispiel veranschaulicht, wie mit der DataField-Eigenschaft der Name des Felds in der Datenquelle angegeben wird, das an BoundColumn gebunden werden soll.
<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<html>
<script language="VB" runat="server">
Function CreateDataSource() As ICollection
Dim dt As New DataTable()
Dim dr As DataRow
dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
dt.Columns.Add(New DataColumn("CurrencyValue", GetType(Double)))
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 New DataView(dt)
Return dv
End Function 'CreateDataSource
Sub Page_Load(sender As Object, e As EventArgs)
If Not IsPostBack Then
' Load this data only once.
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End If
End Sub 'Page_Load
</script>
<body>
<form runat=server>
<h3>BoundColumn Example</h3>
<b>Product List</b>
<asp:DataGrid id="ItemsGrid"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="false"
runat="server">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<Columns>
<asp:BoundColumn
HeaderText="Number"
DataField="IntegerValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Description"
DataField="StringValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Price"
DataField="CurrencyValue"
DataFormatString="{0:c}">
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<html>
<script language="C#" runat="server">
ICollection CreateDataSource()
{
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
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)
{
if (!IsPostBack)
{
// Load this data only once.
ItemsGrid.DataSource= CreateDataSource();
ItemsGrid.DataBind();
}
}
</script>
<body>
<form runat=server>
<h3>BoundColumn Example</h3>
<b>Product List</b>
<asp:DataGrid id="ItemsGrid"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="false"
runat="server">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<Columns>
<asp:BoundColumn
HeaderText="Number"
DataField="IntegerValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Description"
DataField="StringValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Price"
DataField="CurrencyValue"
DataFormatString="{0:c}">
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
</form>
</body>
</html>
<%@ Page Language="JScript" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<html>
<script language="JScript" runat="server">
function CreateDataSource() : ICollection
{
var dt : DataTable = new DataTable();
var dr : DataRow;
dt.Columns.Add(new DataColumn("IntegerValue", GetType(Int32)));
dt.Columns.Add(new DataColumn("StringValue", GetType(String)));
dt.Columns.Add(new DataColumn("CurrencyValue", GetType(double)));
for (var i : int = 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);
}
var dv : DataView = new DataView(dt);
return dv;
}
function Page_Load(sender : Object, e : EventArgs)
{
if (!IsPostBack)
{
// Load this data only once.
ItemsGrid.DataSource= CreateDataSource();
ItemsGrid.DataBind();
}
}
</script>
<body>
<form runat=server>
<h3>BoundColumn Example</h3>
<b>Product List</b>
<asp:DataGrid id="ItemsGrid"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="false"
runat="server">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<Columns>
<asp:BoundColumn
HeaderText="Number"
DataField="IntegerValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Description"
DataField="StringValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Price"
DataField="CurrencyValue"
DataFormatString="{0:c}">
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
</form>
</body>
</html>
Plattformen
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
Siehe auch
Referenz
BoundColumn-Klasse
BoundColumn-Member
System.Web.UI.WebControls-Namespace
String.Empty