DataGridItem.DataSetIndex 屬性
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
取得繫結資料來源中 DataGridItem 物件的索引。
public:
virtual property int DataSetIndex { int get(); };public virtual int DataSetIndex { get; }member this.DataSetIndex : intPublic Overridable ReadOnly Property DataSetIndex As Integer屬性值
繫結資料來源中的 DataGridItem 索引。
範例
下列程式碼範例示範如何使用 DataSetIndex 屬性，從系結資料來源顯示物件的索引 DataGridItem 。
注意
下列程式碼範例會使用單一檔案程式碼模型，如果直接複製到程式碼後置檔案，可能無法正常運作。 此程式碼範例必須複製到副檔名為 .aspx 的空白文字檔。
<%@ 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 language="C#" runat="server">
DataTable Cart;
DataView CartView;
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 < 10; 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)
{
// Need to load this data only once.
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
}
void Button_Click(Object sender, EventArgs e)
{
Label1.Text = "The DataSetIndex of each item in the DataGrid are: <br />";
foreach (DataGridItem item in ItemsGrid.Items)
{
Label1.Text += "<br />" + item.DataSetIndex.ToString() +
" - " + item.Cells[1].Text;
}
}
</script>
<head runat="server">
<title>DataGridItem DataSetIndex Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataGridItem DataSetIndex Example</h3>
<asp:DataGrid id="ItemsGrid" runat="server"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
ShowFooter="true"
AutoGenerateColumns="true">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<FooterStyle BackColor="#00aaaa">
</FooterStyle>
</asp:DataGrid>
<br />
<asp:Button id="Button1"
Text="Display DataSetIndex of Items in DataGrid"
OnClick="Button_Click"
runat="server"/>
<br /><br />
<asp:Label id="Label1"
runat="server"/>
</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 language="VB" runat="server">
Dim Cart As DataTable
Dim CartView As DataView
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 9
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
' Need to load this data only once.
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End If
End Sub 'Page_Load
Sub Button_Click(sender As Object, e As EventArgs)
Label1.Text = "The DataSetIndex of each item in the DataGrid are: <br />"
Dim item As DataGridItem
For Each item In ItemsGrid.Items
Label1.Text &= "<br />" & item.DataSetIndex.ToString() & " - " & item.Cells(1).Text
Next item
End Sub 'Button_Click
</script>
<head runat="server">
<title>DataGridItem DataSetIndex Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataGridItem DataSetIndex Example</h3>
<asp:DataGrid id="ItemsGrid" runat="server"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
ShowFooter="true"
AutoGenerateColumns="true">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<FooterStyle BackColor="#00aaaa">
</FooterStyle>
</asp:DataGrid>
<br />
<asp:Button id="Button1"
Text="Display DataSetIndex of Items in DataGrid"
OnClick="Button_Click"
runat="server"/>
<br /><br />
<asp:Label id="Label1"
runat="server"/>
</form>
</body>
</html>
備註
DataSetIndex使用 屬性從系結資料來源取得物件的索引 DataGridItem 。
注意
此屬性僅適用于 控制項中的資料 DataGrid 項。 物件的 ItemType 屬性 DataGridItem 必須設定為 ListItemType.Item 、 ListItemType.AlternatingItem 、 ListItemType.SelectedItem 或 ListItemType.EditItem 。