GridViewRowCollection.Item[Int32] Propriété
Définition
Important
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Obtient l’objet GridViewRow à l’index spécifié.
public:
property System::Web::UI::WebControls::GridViewRow ^ default[int] { System::Web::UI::WebControls::GridViewRow ^ get(int index); };public System.Web.UI.WebControls.GridViewRow this[int index] { get; }member this.Item(int) : System.Web.UI.WebControls.GridViewRowDefault Public ReadOnly Property Item(index As Integer) As GridViewRowParamètres
- index
- Int32
Index de l'objet GridViewRow à extraire de la collection.
Valeur de propriété
Objet GridViewRow à l’index spécifié dans la collection.
Exemples
L’exemple suivant montre comment utiliser l’indexeur pour récupérer un GridViewRow objet de la collection. Les valeurs des cellules de l’objet GridViewRow sont affichées sur la page.
<%@ 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 AuthorsGridView_RowUpdating (Object sender, GridViewUpdateEventArgs e)
{
// The GridView control does not automatically extract updated values
// from TemplateField column fields. These values must be added manually
// to the NewValues dictionary.
// Get the GridViewRow object that represents the row being edited
// from the Rows collection of the GridView control.
int index = AuthorsGridView.EditIndex;
GridViewRow row = AuthorsGridView.Rows[index];
// Get the controls that contain the updated values. In this
// example, the updated values are contained in the TextBox
// controls declared in the EditItemTemplates of the TemplateField
// column fields in the GridView control.
TextBox lastName = (TextBox)row.FindControl("LastNameTextBox");
TextBox firstName = (TextBox)row.FindControl("FirstNameTextBox");
// Add the updated values to the NewValues dictionary. Use the
// parameter names declared in the parameterized update query
// string for the key names.
e.NewValues["au_lname"] = lastName.Text;
e.NewValues["au_fname"] = firstName.Text;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridViewRowCollection Indexer Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridViewRowCollection Indexer Example</h3>
<!-- The GridView control automatically sets the columns -->
<!-- specified in the datakeynames attribute as read-only -->
<!-- No input controls are rendered for these columns in -->
<!-- edit mode. -->
<asp:gridview id="AuthorsGridView"
datasourceid="AuthorsSqlDataSource"
autogeneratecolumns="false"
autogenerateeditbutton="true"
datakeynames="au_id"
cellpadding="10"
onrowupdating="AuthorsGridView_RowUpdating"
runat="server">
<columns>
<asp:boundfield datafield="au_id"
headertext="Author ID"
readonly="true"/>
<asp:templatefield headertext="Last Name"
itemstyle-verticalalign="Top">
<itemtemplate>
<%#Eval("au_lname")%>
</itemtemplate>
<edititemtemplate>
<asp:textbox id="LastNameTextBox"
text='<%#Eval("au_lname")%>'
width="90"
runat="server"/>
<br/>
<asp:requiredfieldvalidator id="LastNameRequiredValidator"
controltovalidate="LastNameTextBox"
display="Dynamic"
text="Please enter a last name."
runat="server" />
</edititemtemplate>
</asp:templatefield>
<asp:templatefield headertext="First Name"
itemstyle-verticalalign="Top">
<itemtemplate>
<%#Eval("au_fname")%>
</itemtemplate>
<edititemtemplate>
<asp:textbox id="FirstNameTextBox"
text='<%#Eval("au_fname")%>'
width="90"
runat="server"/>
<br/>
<asp:requiredfieldvalidator id="FirstNameRequiredValidator"
controltovalidate="FirstNameTextBox"
display="Dynamic"
text="Please enter a first name."
runat="server" />
</edititemtemplate>
</asp:templatefield>
<asp:checkboxfield datafield="contract"
headertext="Contract"
readonly="true"/>
</columns>
</asp:gridview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Pubs sample database. -->
<asp:sqldatasource id="AuthorsSqlDataSource"
selectcommand="SELECT [au_id], [au_lname], [au_fname], [contract] FROM [authors]"
updatecommand="UPDATE authors SET au_lname=@au_lname, au_fname=@au_fname WHERE (authors.au_id = @au_id)"
connectionstring="server=localhost;database=pubs;integrated security=SSPI"
runat="server">
</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">
Sub AuthorsGridView_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
' The GridView control does not automatically extract updated values
' from TemplateField column fields. These values must be added manually
' to the NewValues dictionary.
' Get the GridViewRow object that represents the row being edited
' from the Rows collection of the GridView control.
Dim index As Integer = AuthorsGridView.EditIndex
Dim row As GridViewRow = AuthorsGridView.Rows(index)
' Get the controls that contain the updated values. In this
' example, the updated values are contained in the TextBox
' controls declared in the EditItemTemplates of the TemplateField
' column fields in the GridView control.
Dim lastName As TextBox = CType(row.FindControl("LastNameTextBox"), TextBox)
Dim firstName As TextBox = CType(row.FindControl("FirstNameTextBox"), TextBox)
' Add the updated values to the NewValues dictionary. Use the
' parameter names declared in the parameterized update query
' string for the key names.
e.NewValues("au_lname") = lastName.Text
e.NewValues("au_fname") = firstName.Text
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridViewRowCollection Indexer Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridViewRowCollection Indexer Example</h3>
<!-- The GridView control automatically sets the columns -->
<!-- specified in the datakeynames attribute as read-only -->
<!-- No input controls are rendered for these columns in -->
<!-- edit mode. -->
<asp:gridview id="AuthorsGridView"
datasourceid="AuthorsSqlDataSource"
autogeneratecolumns="false"
autogenerateeditbutton="true"
datakeynames="au_id"
cellpadding="10"
onrowupdating="AuthorsGridView_RowUpdating"
runat="server">
<columns>
<asp:boundfield datafield="au_id"
headertext="Author ID"
readonly="true"/>
<asp:templatefield headertext="Last Name"
itemstyle-verticalalign="Top">
<itemtemplate>
<%#Eval("au_lname")%>
</itemtemplate>
<edititemtemplate>
<asp:textbox id="LastNameTextBox"
text='<%#Eval("au_lname")%>'
width="90"
runat="server"/>
<br/>
<asp:requiredfieldvalidator id="LastNameRequiredValidator"
controltovalidate="LastNameTextBox"
display="Dynamic"
text="Please enter a last name."
runat="server" />
</edititemtemplate>
</asp:templatefield>
<asp:templatefield headertext="First Name"
itemstyle-verticalalign="Top">
<itemtemplate>
<%#Eval("au_fname")%>
</itemtemplate>
<edititemtemplate>
<asp:textbox id="FirstNameTextBox"
text='<%#Eval("au_fname")%>'
width="90"
runat="server"/>
<br/>
<asp:requiredfieldvalidator id="FirstNameRequiredValidator"
controltovalidate="FirstNameTextBox"
display="Dynamic"
text="Please enter a first name."
runat="server" />
</edititemtemplate>
</asp:templatefield>
<asp:checkboxfield datafield="contract"
headertext="Contract"
readonly="true"/>
</columns>
</asp:gridview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Pubs sample database. -->
<asp:sqldatasource id="AuthorsSqlDataSource"
selectcommand="SELECT [au_id], [au_lname], [au_fname], [contract] FROM [authors]"
updatecommand="UPDATE authors SET au_lname=@au_lname, au_fname=@au_fname WHERE (authors.au_id = @au_id)"
connectionstring="server=localhost;database=pubs;integrated security=SSPI"
runat="server">
</asp:sqldatasource>
</form>
</body>
</html>
Remarques
Utilisez cet indexeur pour récupérer un GridViewRow objet de la collection à l’index spécifié, à l’aide de la notation de tableau.