DataKey.Values 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
获取一个 IOrderedDictionary 对象，它包含 DataKey 对象中的每个键字段。
public:
virtual property System::Collections::Specialized::IOrderedDictionary ^ Values { System::Collections::Specialized::IOrderedDictionary ^ get(); };public virtual System.Collections.Specialized.IOrderedDictionary Values { get; }member this.Values : System.Collections.Specialized.IOrderedDictionaryPublic Overridable ReadOnly Property Values As IOrderedDictionary属性值
一个 IOrderedDictionary，包含 DataKey 中的每个键字段。
示例
下面的代码示例演示如何循环访问 IOrderedDictionary 属性 Values 返回的对象。
<%@ Page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void CustomerDetailsView_DataBound(Object sender, EventArgs e)
{
// Retrieve the IOrderedDictionary object that contains the key field values.
IOrderedDictionary allKeysDictionary = CustomerDetailsView.DataKey.Values;
// Display the value of the key fields.
MessageLabel.Text = "The key field values for the displayed record are: <br/><br/>";
foreach (DictionaryEntry entry in allKeysDictionary)
{
MessageLabel.Text += "Key=" + entry.Key.ToString() +
", Value=" + entry.Value.ToString() + "<br/>";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DataKey Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataKey Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
autogeneraterows="true"
datakeynames="CustomerID, CompanyName, PostalCode"
allowpaging="true"
ondatabound="CustomerDetailsView_DataBound"
runat="server">
</asp:detailsview>
<br/>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
<%@ Page language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub CustomerDetailsView_DataBound(ByVal sender As Object, ByVal e As EventArgs) Handles CustomerDetailsView.DataBound
' Retrieve the IOrderedDictionary object that contains the key field values.
Dim allKeysDictionary As IOrderedDictionary = CustomerDetailsView.DataKey.Values
' Display the value of the key fields.
MessageLabel.Text = "The key field values for the displayed record are: <br/><br/>"
' In Visual Basic, the DictionaryEntry objects contained in the
' allKeysDictionary object must be copied to an array before
' you can iterate through the items.
Dim allKeysArray(allKeysDictionary.Count - 1) As DictionaryEntry
allKeysDictionary.CopyTo(allKeysArray, 0)
Dim entry As DictionaryEntry
For Each entry In allKeysArray
MessageLabel.Text &= "Key=" & entry.Key.ToString() & _
", Value=" & entry.Value.ToString() & "<br/>"
Next
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DataKey Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataKey Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
autogeneraterows="true"
datakeynames="CustomerID, CompanyName, PostalCode"
allowpaging="true"
runat="server">
</asp:detailsview>
<br/>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
注解
Values使用 属性检索IOrderedDictionary包含 对象中每个键字段的 DataKey 对象。 对象 IOrderedDictionary 通常用于循环访问记录的关键字段。
