ListView.InsertItem Eigenschaft
Definition
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
Ruft das einzufügende Element eines ListView-Steuerelements ab.
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 ListViewItemEigenschaftswert
Ein Objekt, das das einzufügende Element eines ListView-Steuerelements darstellt.
- Attribute
Beispiele
Das folgende Beispiel zeigt, wie Sie das Einfügen-Element mithilfe der InsertItem Eigenschaft abrufen, um auf Steuerelemente zuzugreifen, die in der InsertItemTemplate Vorlage enthalten sind.
Wichtig
Dieses Beispiel enthält Textfelder, die Benutzereingaben akzeptieren, was eine potenzielle Sicherheitsgefährdung ist. Standardmäßig stellen ASP.NET-Webseiten sicher, dass Benutzereingaben keine Skript- oder HTML-Elemente enthalten. Weitere Informationen finden Sie unter Übersicht über Skriptangriffe.
<%@ 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>
Hinweise
Verwenden Sie die InsertItem Eigenschaft, um auf das Einfügenelement eines ListView Steuerelements zuzugreifen. Ein Einfügen-Element ist ein ListViewItem Objekt, dessen ItemType Wert gleich ListViewItemType.InsertItemist. Der Inhalt eines Einfügeelements wird durch die InsertItemTemplate Eigenschaft definiert.