ListView.InsertItem Eigenschap
Definitie
Belangrijk
Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.
Hiermee haalt u het invoegitem van een ListView besturingselement op.
public:
virtual property System::Web::UI::WebControls::ListViewItem ^ InsertItem { System::Web::UI::WebControls::ListViewItem ^ get(); };[System.ComponentModel.Browsable(false)]
public virtual System.Web.UI.WebControls.ListViewItem InsertItem { get; }[<System.ComponentModel.Browsable(false)>]
member this.InsertItem : System.Web.UI.WebControls.ListViewItemPublic Overridable ReadOnly Property InsertItem As ListViewItemWaarde van eigenschap
Een object dat het invoegitem van een ListView besturingselement vertegenwoordigt.
- Kenmerken
Voorbeelden
In het volgende voorbeeld ziet u hoe u het item invoegen kunt ophalen met behulp van de InsertItem eigenschap voor toegang tot besturingselementen die zijn opgenomen in de InsertItemTemplate sjabloon.
Important
Dit voorbeeld bevat tekstvakken die gebruikersinvoer accepteren. Dit is een mogelijke beveiligingsrisico. Standaard valideren ASP.NET webpagina's dat gebruikersinvoer geen script- of HTML-elementen bevat. Zie Overzicht van Script Exploits voor meer informatie.
<%@ 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 CountriesListView_ItemInserting(object sender, ListViewInsertEventArgs e)
{
// Get the controls that are contained in the insert item.
TextBox countryCodeTextBox =
(TextBox)CountriesListView.InsertItem.FindControl("CountryCodeTextBox");
TextBox nameTextBox =
(TextBox)CountriesListView.InsertItem.FindControl("NameTextBox");
//Check if the controls are empty.
if ((countryCodeTextBox.Text.Trim().Length == 0) ||
(nameTextBox.Text.Trim().Length == 0))
{
MessageLabel.Text =
"The system could not insert the item. All fields are required.";
e.Cancel = true;
return;
}
}
protected void Page_Load(object sender, EventArgs e)
{
//Clear the message label.
MessageLabel.Text = "";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>ListView InsertItem Example</title>
<style type="text/css">
body { font: 10pt Trebuchet MS, Arial, Tahoma; }
th { background: #8FBC8F; }
.item td { border: 1px solid #8FBC8F; }
.insertItem td { background: #D3D3D3; }
</style>
</head>
<body>
<form id="form1" runat="server">
<h3>ListView InsertItem Example</h3>
<asp:ListView ID="CountriesListView"
DataSourceID="CountryDataSource"
DataKeyNames="CountryRegionCode"
InsertItemPosition="LastItem"
runat="server"
oniteminserting="CountriesListView_ItemInserting">
<LayoutTemplate>
<table cellpadding="4" width="500" runat="server" id="tblCountries">
<tr runat="server">
<th runat="server">Code</th>
<th runat="server">Name</th>
</tr>
<tr runat="server" id="itemPlaceholder" />
</table>
<asp:DataPager ID="CountriesPager" runat="server" PageSize="20">
<Fields>
<asp:NumericPagerField ButtonCount="10" />
</Fields>
</asp:DataPager>
</LayoutTemplate>
<ItemTemplate>
<tr class="item" runat="server">
<td>
<asp:Label ID="CountryCodeLabel" runat="server"
Text='<%# Eval("CountryRegionCode")%>' />
</td>
<td>
<asp:Label ID="NameLabel" runat="server"
Text='<%# Eval("Name")%>' />
</td>
</tr>
</ItemTemplate>
<InsertItemTemplate>
<tr class="insertItem">
<td align="right">Code:</td>
<td align="left">
<asp:TextBox ID="CountryCodeTextBox" runat="server"
Text='<%# Bind("CountryRegionCode")%>'
MaxLength="3" />
</td>
</tr>
<tr class="insertItem">
<td align="right">Name:</td>
<td align="left">
<asp:TextBox ID="NameTextBox" runat="server"
Text='<%# Bind("Name")%>'
MaxLength="50" />
</td>
</tr>
<tr class="insertItem" runat="server">
<td colspan="2" align="center">
<asp:Button ID="InsertButton" runat="server"
CommandName="Insert" Text="Insert" />
<asp:Button ID="CancelButton" runat="server"
CommandName="Cancel" Text="Clear" />
</td>
</tr>
</InsertItemTemplate>
</asp:ListView>
<br /><br />
<asp:Label ID="MessageLabel"
ForeColor="Red"
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="CountryDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT [CountryRegionCode], [Name]
FROM [Person].[CountryRegion]"
InsertCommand="INSERT INTO Person.CountryRegion(CountryRegionCode, Name)
VALUES (@CountryRegionCode, @Name)">
</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 CountriesListView_ItemInserting(ByVal sender As Object, _
ByVal e As ListViewInsertEventArgs)
' Get the controls that are contained in the insert item.
Dim countryCodeTextBox As TextBox = _
CType(CountriesListView.InsertItem.FindControl("CountryCodeTextBox"), TextBox)
Dim nameTextBox As TextBox = _
CType(CountriesListView.InsertItem.FindControl("NameTextBox"), TextBox)
'Check if the controls are empty.
If countryCodeTextBox.Text.Trim().Length = 0 _
OrElse nameTextBox.Text.Trim().Length = 0 Then
MessageLabel.Text = "The system could not insert the item. All fields are required."
e.Cancel = True
Return
End If
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
'Clear the message label.
MessageLabel.Text = ""
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>ListView InsertItem Example</title>
<style type="text/css">
body { font: 10pt Trebuchet MS, Arial, Tahoma; }
th { background: #8FBC8F; }
.item td { border: 1px solid #8FBC8F; }
.insertItem td { background: #D3D3D3; }
</style>
</head>
<body>
<form id="form1" runat="server">
<h3>ListView InsertItem Example</h3>
<asp:ListView ID="CountriesListView"
DataSourceID="CountryDataSource"
DataKeyNames="CountryRegionCode"
InsertItemPosition="LastItem"
runat="server"
oniteminserting="CountriesListView_ItemInserting">
<LayoutTemplate>
<table cellpadding="4" width="500" runat="server" id="tblCountries">
<tr runat="server">
<th runat="server">Code</th>
<th runat="server">Name</th>
</tr>
<tr runat="server" id="itemPlaceholder" />
</table>
<asp:DataPager ID="CountriesPager" runat="server" PageSize="20">
<Fields>
<asp:NumericPagerField ButtonCount="10" />
</Fields>
</asp:DataPager>
</LayoutTemplate>
<ItemTemplate>
<tr class="item" runat="server">
<td>
<asp:Label ID="CountryCodeLabel" runat="server"
Text='<%# Eval("CountryRegionCode")%>' />
</td>
<td>
<asp:Label ID="NameLabel" runat="server"
Text='<%# Eval("Name")%>' />
</td>
</tr>
</ItemTemplate>
<InsertItemTemplate>
<tr class="insertItem">
<td align="right">Code:</td>
<td align="left">
<asp:TextBox ID="CountryCodeTextBox" runat="server"
Text='<%# Bind("CountryRegionCode")%>'
MaxLength="3" />
</td>
</tr>
<tr class="insertItem">
<td align="right">Name:</td>
<td align="left">
<asp:TextBox ID="NameTextBox" runat="server"
Text='<%# Bind("Name")%>'
MaxLength="50" />
</td>
</tr>
<tr class="insertItem" runat="server">
<td colspan="2" align="center">
<asp:Button ID="InsertButton" runat="server"
CommandName="Insert" Text="Insert" />
<asp:Button ID="CancelButton" runat="server"
CommandName="Cancel" Text="Clear" />
</td>
</tr>
</InsertItemTemplate>
</asp:ListView>
<br /><br />
<asp:Label ID="MessageLabel"
ForeColor="Red"
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="CountryDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT [CountryRegionCode], [Name]
FROM [Person].[CountryRegion]"
InsertCommand="INSERT INTO Person.CountryRegion(CountryRegionCode, Name)
VALUES (@CountryRegionCode, @Name)">
</asp:SqlDataSource>
</form>
</body>
</html>
Opmerkingen
Gebruik de InsertItem eigenschap voor toegang tot het invoegitem van een ListView besturingselement. Een invoegitem is een ListViewItem object waarvan ItemType het gelijk is aan ListViewItemType.InsertItem. De inhoud van een invoegitem wordt gedefinieerd door de InsertItemTemplate eigenschap.
