FormViewInsertEventArgs 類別
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。
提供 ItemInserting 事件的資料。
public ref class FormViewInsertEventArgs : System::ComponentModel::CancelEventArgspublic class FormViewInsertEventArgs : System.ComponentModel.CancelEventArgstype FormViewInsertEventArgs = class
inherit CancelEventArgsPublic Class FormViewInsertEventArgs
Inherits CancelEventArgs- 繼承
範例
下列範例示範如何使用 FormViewInsertEventArgs 傳遞至事件處理方法的物件 ItemInserting ，在用戶離開字段空白時取消插入作業。
重要
此範例包含一個文本框，可接受用戶輸入，這是潛在的安全性威脅。 根據預設，ASP.NET Web 網頁會驗證使用者輸入未包含指令碼或 HTML 項目。 如需詳細資訊，請參閱 Script Exploits Overview (指令碼攻擊概觀)。
<%@ 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>
備註
FormView控件會在單擊控件內的按鈕 (按鈕的 [CommandName插入] ) ，但在控件插入記錄之前FormView，控件會引發 ItemInserting 事件。 這可讓您提供事件處理方法，以執行自定義例程，例如 HTML 編碼，或在數據源中插入記錄之前驗證記錄的值，每當發生此事件時。
FormViewInsertEventArgs物件會傳遞至事件處理方法，這可讓您判斷傳送至FormView控件的選擇性命令自變數值，並指出應該取消插入作業。 若要判斷命令自變數的值，請使用 CommandArgument 屬性。 若要取消插入工作，請將 Cancel 屬性設定為 true。 您也可以使用 Values 屬性來讀取或修改新記錄的域值。
如需如何處理事件的詳細資訊，請參閱 處理和引發事件。
如需 FormViewInsertEventArgs 類別之執行個體的初始屬性值清單，請參閱 FormViewInsertEventArgs 建構函式。
建構函式
| FormViewInsertEventArgs(Object) |
初始化 FormViewInsertEventArgs 類別的新執行個體。 |
屬性
| Cancel |
取得或設定值，這個值表示是否應該取消事件。 (繼承來源 CancelEventArgs) |
| CommandArgument |
取得傳遞到 FormView 控制項的插入作業命令引數。 |
| Values |
取得字典，其包含要插入之資料錄的欄位名稱/值組。 |
方法
| Equals(Object) |
判斷指定的物件是否等於目前的物件。 (繼承來源 Object) |
| GetHashCode() |
做為預設雜湊函式。 (繼承來源 Object) |
| GetType() |
取得目前執行個體的 Type。 (繼承來源 Object) |
| MemberwiseClone() |
建立目前 Object 的淺層複製。 (繼承來源 Object) |
| ToString() |
傳回代表目前物件的字串。 (繼承來源 Object) |
適用於
另請參閱
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