DetailsViewDeleteEventArgs.Values Property
Definition
Important
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Gets a dictionary of the non-key field name/value pairs for the item to delete.
public:
property System::Collections::Specialized::IOrderedDictionary ^ Values { System::Collections::Specialized::IOrderedDictionary ^ get(); };public System.Collections.Specialized.IOrderedDictionary Values { get; }member this.Values : System.Collections.Specialized.IOrderedDictionaryPublic ReadOnly Property Values As IOrderedDictionaryProperty Value
A IOrderedDictionary that contains a dictionary of the non-key field name/value pairs for the item to delete.
Examples
The following code example demonstrates how to use the Values property to access the values of the non-key fields of the record being deleted.
<%@ 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_ItemDeleting(Object sender,
DetailsViewDeleteEventArgs e)
{
// Get customer ID and name from the Keys and Values
// properties.
String keyValue = e.Keys["CustomerID"].ToString();
String customerName = e.Values["CompanyName"].ToString();
// Cancel the delete operation if the user attempts to
// delete protected record. In this example, records
// with a customer ID that starts with with "A" cannot
// be deleted.
if (keyValue.StartsWith("A"))
{
e.Cancel = true;
MessageLabel.Text = "You cannot delete " +
customerName + ". This customer is protected.";
}
else
{
MessageLabel.Text = "Row " + e.RowIndex.ToString() +
" deleted.";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewDeleteEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewDeleteEventArgs Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogeneratedeletebutton="true"
autogeneraterows="true"
allowpaging="true"
onitemdeleting="CustomerDetailsView_ItemDeleting"
runat="server">
<fieldheaderstyle backcolor="Navy"
forecolor="White"/>
</asp:detailsview>
<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]"
deletecommand="Delete [Customers]
Where [CustomerID]=@CustomerID"
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_ItemDeleting(ByVal sender As Object, _
ByVal e As DetailsViewDeleteEventArgs)
' Get customer ID and name from the Keys and Values
' properties.
Dim keyValue As String = e.Keys("CustomerID").ToString()
Dim customerName As String = e.Values("CompanyName").ToString()
' Cancel the delete operation if the user attempts to
' delete protected record. In this example, records
' with a customer ID that starts with with "A" cannot
' be deleted.
If keyValue.StartsWith("A") Then
e.Cancel = True
MessageLabel.Text = "You cannot delete " & _
customerName & ". This customer is protected."
Else
MessageLabel.Text = "Row " & e.RowIndex.ToString() & _
" deleted."
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewDeleteEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewDeleteEventArgs Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogeneratedeletebutton="true"
autogeneraterows="true"
allowpaging="true"
onitemdeleting="CustomerDetailsView_ItemDeleting"
runat="server">
<fieldheaderstyle backcolor="Navy"
forecolor="White"/>
</asp:detailsview>
<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]"
deletecommand="Delete [Customers]
Where [CustomerID]=@CustomerID"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
Remarks
Use the Values property to access the values of the non-key fields for the record to be deleted. For example, you can use these values to verify the record before deleting it, or to keep a log of deleted records.
Note
This property does not contain the key field or fields. To access the name/value pair values for the key field or fields, use the Keys property.
The Values property returns an object that implements the IOrderedDictionary interface. The object contains DictionaryEntry objects that represent the non-key fields.
Note
As a shortcut, you can also use the indexer of the IOrderedDictionary object to access the field values. The advantage in using the indexer is that it returns field values directly.
Applies to
See also
.NET