FormViewInsertEventArgs.Values 属性
定义
重要
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获取包含要插入的记录所对应的字段名/值对的字典。
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 IOrderedDictionary属性值
一个 IOrderedDictionary，包含要插入的记录所对应的键字段名称/值对的字典。
示例
以下示例演示如何循环访问 Values 集合。
<%@ 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 EmployeeFormView_ItemInserting(Object sender, FormViewInsertEventArgs e)
{
MessageLabel.Text = "";
// Iterate through the items in the Values collection
// and verify that the user entered a value for each
// text box displayed in the insert item template. Cancel
// the insert operation if the user left a text box empty.
foreach (DictionaryEntry entry in e.Values)
{
if (entry.Value.Equals(""))
{
// Use the Cancel property to cancel the
// insert operation.
e.Cancel = true;
MessageLabel.Text += "Please enter a value for the " +
entry.Key.ToString() + " field.<br/>";
}
}
}
void EmployeeFormView_ModeChanged(Object sender, EventArgs e)
{
// Clear the MessageLabel Label control when the FormView
// control changes modes.
MessageLabel.Text = "";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FormViewInsertEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>FormViewInsertEventArgs Example</h3>
<asp:formview id="EmployeeFormView"
datasourceid="EmployeeSource"
allowpaging="true"
datakeynames="EmployeeID"
emptydatatext="No employees found."
oniteminserting="EmployeeFormView_ItemInserting"
onmodechanged="EmployeeFormView_ModeChanged"
runat="server">
<itemtemplate>
<table>
<tr>
<td rowspan="5">
<asp:image id="CompanyLogoImage"
imageurl="~/Images/Logo.jpg"
alternatetext="Company logo"
runat="server"/>
</td>
<td colspan="2">
</td>
</tr>
<tr>
<td>
<b>Name:</b>
</td>
<td>
<%# Eval("FirstName") %> <%# Eval("LastName") %>
</td>
</tr>
<tr>
<td>
<b>Title:</b>
</td>
<td>
<%# Eval("Title") %>
</td>
</tr>
<tr>
<td colspan="2">
<asp:linkbutton id="NewButton"
text="New"
commandname="New"
runat="server"/>
</td>
</tr>
</table>
</itemtemplate>
<insertitemtemplate>
<table>
<tr>
<td rowspan="4">
<asp:image id="CompanyLogoEditImage"
imageurl="~/Images/Logo.jpg"
alternatetext="Company logo"
runat="server"/>
</td>
<td colspan="2">
</td>
</tr>
<tr>
<td>
<b><asp:Label
runat="server"
AssociatedControlID="FirstNameInsertTextBox"
Text="Name" />:</b>
</td>
<td>
<asp:textbox id="FirstNameInsertTextBox"
text='<%# Bind("FirstName") %>'
runat="server"/>
<asp:textbox id="LastNameInsertTextBox"
text='<%# Bind("LastName") %>'
runat="server"/>
</td>
</tr>
<tr>
<td>
<b><asp:Label
runat="server"
AssociatedControlID="TitleInsertTextBox"
Text="Title" />:</b>
</td>
<td>
<asp:textbox id="TitleInsertTextBox"
text='<%# Bind("Title") %>'
runat="server"/>
</td>
</tr>
<tr>
<td colspan="2">
<asp:linkbutton id="InsertButton"
text="Insert"
commandname="Insert"
runat="server"/>
<asp:linkbutton id="CancelButton"
text="Cancel"
commandname="Cancel"
runat="server"/>
</td>
</tr>
</table>
</insertitemtemplate>
</asp:formview>
<br/><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="EmployeeSource"
selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
insertcommand="Insert Into [Employees] ([LastName], [FirstName], [Title]) VALUES (@LastName, @FirstName, @Title)"
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 EmployeeFormView_ItemInserting(ByVal sender As Object, ByVal e As FormViewInsertEventArgs)
MessageLabel.Text = ""
' Iterate through the items in the Values collection
' and verify that the user entered a value for each
' text box displayed in the insert item template. Cancel
' the insert operation if the user left a text box empty.
' In Visual Basic, the DictionaryItem objects contained in
' the Values collection must be copied to an array before
' you can iterate through the collection.
Dim itemArray(e.Values.Count - 1) As DictionaryEntry
e.Values.CopyTo(itemArray, 0)
Dim entry As DictionaryEntry
For Each entry In itemArray
If entry.Value.Equals("") Then
' Use the Cancel property to cancel the
' insert operation.
e.Cancel = True
MessageLabel.Text &= "Please enter a value for the " & _
entry.Key.ToString() & " field.<br/>"
End If
Next
End Sub
Sub EmployeeFormView_ModeChanged(ByVal sender As Object, ByVal e As EventArgs)
' Clear the MessageLabel Label control when the FormView
' control changes modes.
MessageLabel.Text = ""
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FormViewInsertEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>FormViewInsertEventArgs Example</h3>
<asp:formview id="EmployeeFormView"
datasourceid="EmployeeSource"
allowpaging="true"
datakeynames="EmployeeID"
emptydatatext="No employees found."
oniteminserting="EmployeeFormView_ItemInserting"
onmodechanged="EmployeeFormView_ModeChanged"
runat="server">
<itemtemplate>
<table>
<tr>
<td rowspan="5">
<asp:image id="CompanyLogoImage"
imageurl="~/Images/Logo.jpg"
alternatetext="Company logo"
runat="server"/>
</td>
<td colspan="2">
</td>
</tr>
<tr>
<td>
<b>Name:</b>
</td>
<td>
<%# Eval("FirstName") %> <%# Eval("LastName") %>
</td>
</tr>
<tr>
<td>
<b>Title:</b>
</td>
<td>
<%# Eval("Title") %>
</td>
</tr>
<tr>
<td colspan="2">
<asp:linkbutton id="NewButton"
text="New"
commandname="New"
runat="server"/>
</td>
</tr>
</table>
</itemtemplate>
<insertitemtemplate>
<table>
<tr>
<td rowspan="4">
<asp:image id="CompanyLogoEditImage"
imageurl="~/Images/Logo.jpg"
alternatetext="Company logo"
runat="server"/>
</td>
<td colspan="2">
</td>
</tr>
<tr>
<td>
<b><asp:Label
runat="server"
AssociatedControlID="FirstNameInsertTextBox"
Text="Name" />:</b>
</td>
<td>
<asp:textbox id="FirstNameInsertTextBox"
text='<%# Bind("FirstName") %>'
runat="server"/>
<asp:textbox id="LastNameInsertTextBox"
text='<%# Bind("LastName") %>'
runat="server"/>
</td>
</tr>
<tr>
<td>
<b><asp:Label
runat="server"
AssociatedControlID="TitleInsertTextBox"
Text="Title" />:</b>
</td>
<td>
<asp:textbox id="TitleInsertTextBox"
text='<%# Bind("Title") %>'
runat="server"/>
</td>
</tr>
<tr>
<td colspan="2">
<asp:linkbutton id="InsertButton"
text="Insert"
commandname="Insert"
runat="server"/>
<asp:linkbutton id="CancelButton"
text="Cancel"
commandname="Cancel"
runat="server"/>
</td>
</tr>
</table>
</insertitemtemplate>
</asp:formview>
<br/><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="EmployeeSource"
selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
insertcommand="Insert Into [Employees] ([LastName], [FirstName], [Title]) VALUES (@LastName, @FirstName, @Title)"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
注解
Values使用 属性访问要插入的记录的字段的值。 例如，在将记录插入数据源之前，可以对记录的值进行 HTML 编码或验证。
属性 Values 返回实现 OrderedDictionary 接口的 System.Collections.Specialized.IOrderedDictionary 对象。 对象 OrderedDictionary 包含 System.Collections.DictionaryEntry 表示记录字段的对象。 若要访问字段名称，请使用 Keys 对象的 属性 OrderedDictionary 。 同样，可以使用 属性访问字段值 Values 。
注意
作为快捷方式，还可以使用 对象的索引器 OrderedDictionary 直接访问字段值。 使用索引器的优点是它直接返回字段值。 依赖于字段顺序 (（如) ） AccessDataSource 的数据源控件只能按索引访问字段值。
适用于
另请参阅
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