ListView.InsertItem Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets the insert item of a ListView control.
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 ListViewItemProperty Value
An object that represents the insert item of a ListView control.
- Attributes
Examples
The following example shows how to get the insert item by using the InsertItem property to access controls that are contained in the InsertItemTemplate template.
Important
This example contains text boxes that accept user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.
<%@ 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>
Remarks
Use the InsertItem property to access the insert item of a ListView control. An insert item is a ListViewItem object whose ItemType is equal to ListViewItemType.InsertItem. The content of an insert item is defined by the InsertItemTemplate property.
Applies to
See also
Werk met ons samen op GitHub
De bron voor deze inhoud vindt u op GitHub, waar u ook problemen en pull-aanvragen kunt maken en bekijken. Raadpleeg onze gids voor inzenders voor meer informatie.
