ListView.InsertNewItem(Boolean) Metode
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Menyisipkan rekaman saat ini di sumber data.
public:
virtual void InsertNewItem(bool causesValidation);
public virtual void InsertNewItem (bool causesValidation);
abstract member InsertNewItem : bool -> unit
override this.InsertNewItem : bool -> unit
Public Overridable Sub InsertNewItem (causesValidation As Boolean)
Parameter
- causesValidation
- Boolean
true
untuk melakukan validasi halaman ketika metode ini dipanggil; jika tidak, false
.
Pengecualian
Kontrol ListView tidak memiliki item sisipkan.
-atau-
Objek DataSourceView yang ListView terkait dengan kontrol adalah null
.
Contoh
Contoh berikut menunjukkan cara menggunakan InsertNewItem metode untuk menyisipkan konten item sisipkan kontrol ListView secara terprogram ke dalam sumber data.
Penting
Contoh ini memiliki kotak teks yang menerima input pengguna, yang merupakan potensi ancaman keamanan. Secara default, ASP.NET halaman Web memvalidasi bahwa input pengguna tidak menyertakan elemen skrip atau HTML. Untuk informasi selengkapnya, lihat Gambaran Umum Eksploitasi Skrip.
<%@ 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">
protected void InsertButton_Click(object sender, EventArgs e)
{
// Clears any existing message.
MessageLabel.Text = "";
// Use the InsertNewItem method to programmatically insert
// the current record in the ListView control.
DepartmentsListView.InsertNewItem(true);
}
protected void DepartmentsListView_ItemInserted(object sender,
ListViewInsertedEventArgs e)
{
// Handles exceptions that might occur
// during the insert operation.
if (e.Exception != null)
{
if (e.AffectedRows == 0)
{
e.KeepInInsertMode = true;
MessageLabel.Text = "An exception occurred inserting the new department. " +
"Please verify your values and try again.";
}
else
MessageLabel.Text = "An exception occurred inserting the new department. " +
"Please verify the values in the newly inserted item.";
e.ExceptionHandled = true;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>ListView InsertNewItem Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>ListView InsertNewItem Example</h3>
<h5>Departments</h5>
<asp:ListView ID="DepartmentsListView"
DataSourceID="DepartmentsDataSource"
DataKeyNames="DepartmentID"
InsertItemPosition="FirstItem"
OnItemInserted="DepartmentsListView_ItemInserted"
runat="server" >
<LayoutTemplate>
<table runat="server" id="tblDepartments" width="640px" border="1">
<tr runat="server" id="itemPlaceholder" />
</table>
</LayoutTemplate>
<ItemTemplate>
<tr runat="server">
<td>
<asp:Label ID="NameLabel" runat="Server" Text='<%#Eval("Name") %>' />
</td>
<td>
<asp:Label ID="GroupNameLabel" runat="Server" Text='<%#Eval("GroupName") %>' />
</td>
</tr>
</ItemTemplate>
<InsertItemTemplate>
<tr style="background-color:#00BFFF">
<td>
<asp:Label runat="server" ID="NameLabel" AssociatedControlID="NameTextBox"
Text="Name:" Font-Bold="true"/><br />
<asp:TextBox ID="NameTextBox" runat="server" Text='<%#Bind("Name") %>' />
</td>
<td>
<asp:Label runat="server" ID="GroupNameLabel" AssociatedControlID="GroupNameTextBox"
Text="Group Name:" Font-Bold="true" /><br />
<asp:TextBox ID="GroupNameTextBox" runat="server"
Text='<%#Bind("GroupName") %>' MaxLength="50" />
</td>
</tr>
</InsertItemTemplate>
</asp:ListView><br />
<asp:Label ID="MessageLabel"
ForeColor="Red"
runat="server" /> <br />
<asp:Button ID="InsertButton"
Text="Insert new record"
OnClick="InsertButton_Click"
runat="server" />
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the AdventureWorks sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:SqlDataSource ID="DepartmentsDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT DepartmentID, Name, GroupName FROM HumanResources.Department"
InsertCommand="INSERT INTO HumanResources.Department(Name, GroupName)
VALUES (@Name, @GroupName)">
</asp:SqlDataSource>
</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">
Protected Sub InsertButton_Click(ByVal sender As Object, _
ByVal e As EventArgs)
' Clears any existing message.
MessageLabel.Text = ""
' Use the InsertNewItem method to programmatically insert
' the current record in the ListView control.
DepartmentsListView.InsertNewItem(True)
End Sub
Protected Sub DepartmentsListView_ItemInserted(ByVal sender As Object, _
ByVal e As ListViewInsertedEventArgs)
' Handles exceptions that might occur
' during the insert operation.
If Not (e.Exception Is Nothing) Then
If e.AffectedRows = 0 Then
e.KeepInInsertMode = True
MessageLabel.Text = "An exception occurred inserting the new department. " & _
"Please verify your values and try again."
Else
MessageLabel.Text = "An exception occurred inserting the new department. " & _
"Please verify the values in the newly inserted item."
End If
e.ExceptionHandled = True
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>ListView InsertNewItem Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>ListView InsertNewItem Example</h3>
<h5>Departments</h5>
<asp:ListView ID="DepartmentsListView"
DataSourceID="DepartmentsDataSource"
DataKeyNames="DepartmentID"
InsertItemPosition="FirstItem"
OnItemInserted="DepartmentsListView_ItemInserted"
runat="server" >
<LayoutTemplate>
<table runat="server" id="tblDepartments" width="640px" border="1">
<tr runat="server" id="itemPlaceholder" />
</table>
</LayoutTemplate>
<ItemTemplate>
<tr runat="server">
<td>
<asp:Label ID="NameLabel" runat="Server" Text='<%#Eval("Name") %>' />
</td>
<td>
<asp:Label ID="GroupNameLabel" runat="Server" Text='<%#Eval("GroupName") %>' />
</td>
</tr>
</ItemTemplate>
<InsertItemTemplate>
<tr style="background-color:#00BFFF">
<td>
<asp:Label runat="server" ID="NameLabel" AssociatedControlID="NameTextBox"
Text="Name:" Font-Bold="true"/><br />
<asp:TextBox ID="NameTextBox" runat="server" Text='<%#Bind("Name") %>' />
</td>
<td>
<asp:Label runat="server" ID="GroupNameLabel" AssociatedControlID="GroupNameTextBox"
Text="Group Name:" Font-Bold="true" /><br />
<asp:TextBox ID="GroupNameTextBox" runat="server"
Text='<%#Bind("GroupName") %>' MaxLength="50" />
</td>
</tr>
</InsertItemTemplate>
</asp:ListView><br />
<asp:Label ID="MessageLabel"
ForeColor="Red"
runat="server" /> <br />
<asp:Button ID="InsertButton"
Text="Insert new record"
OnClick="InsertButton_Click"
runat="server" />
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the AdventureWorks sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:SqlDataSource ID="DepartmentsDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT DepartmentID, Name, GroupName FROM HumanResources.Department"
InsertCommand="INSERT INTO HumanResources.Department(Name, GroupName)
VALUES (@Name, @GroupName)">
</asp:SqlDataSource>
</form>
</body>
</html>
Keterangan
InsertNewItem Gunakan metode untuk menyisipkan item secara terprogram di sumber data. Metode ini biasanya digunakan untuk menyisipkan item dari luar ListView kontrol, seperti dari kontrol yang berbeda pada halaman.
Untuk menggunakan metode ini InsertNewItem , Anda harus menentukan InsertItemTemplate templat dalam ListView kontrol. Anda juga harus mengatur InsertItemPosition properti ke nilai yang berbeda dari InsertItemPosition.None. Untuk menentukan apakah validasi halaman dilakukan sebelum operasi penyisipan, gunakan causesValidation
parameter .
Metode ini meningkatkan ItemInserted peristiwa dan ItemInserting .