DataGridItem.DataSetIndex 属性
定义
重要
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获取绑定数据源中的 DataGridItem 对象的索引。
public:
virtual property int DataSetIndex { int get(); };public virtual int DataSetIndex { get; }member this.DataSetIndex : intPublic Overridable ReadOnly Property DataSetIndex As Integer属性值
绑定数据源中的 DataGridItem 的索引。
示例
下面的代码示例演示如何使用 DataSetIndex 属性显示绑定数据源中对象的索引 DataGridItem 。
备注
下面的代码示例使用单文件代码模型，如果直接复制到代码隐藏文件中，可能无法正常工作。 此代码示例必须复制到具有 .aspx 扩展名的空文本文件中。
<%@ 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>
注解
DataSetIndex使用属性从绑定数据源中获取对象的索引DataGridItem。
备注
此属性仅适用于控件中的数据 DataGrid 项。 ItemType对象的属性DataGridItem必须设置为ListItemType.Item、ListItemType.AlternatingItem或 ListItemType.SelectedItem``ListItemType.EditItem。