GridView.UpdateRow(Int32, Boolean) Metode
Definisi
Penting
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Memperbarui rekaman pada indeks baris yang ditentukan menggunakan nilai bidang baris.
public:
virtual void UpdateRow(int rowIndex, bool causesValidation);public virtual void UpdateRow (int rowIndex, bool causesValidation);abstract member UpdateRow : int * bool -> unit
override this.UpdateRow : int * bool -> unitPublic Overridable Sub UpdateRow (rowIndex As Integer, causesValidation As Boolean)Parameter
- rowIndex
- Int32
Indeks baris yang akan diperbarui.
- causesValidation
- Boolean
true untuk melakukan validasi halaman ketika metode ini dipanggil; jika tidak, false.
Pengecualian
Kontrol GridView terikat ke kontrol sumber data, tetapi yang DataSourceView terkait dengan sumber data adalah null.
Contoh
Contoh berikut menunjukkan cara menggunakan UpdateRow metode untuk memperbarui rekaman secara terprogram dalam GridView kontrol.
<%@ 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 UpdateRowButton_Click(Object sender, EventArgs e)
{
// Programmatically update the current record in edit mode.
CustomersGridView.UpdateRow(CustomersGridView.EditIndex, true);
}
void CustomersGridView_RowCommand(Object sender, GridViewCommandEventArgs e)
{
// Enable the UpdateRowButton button only when the GridView control
// is in edit mode.
switch (e.CommandName)
{
case "Edit":
UpdateRowButton.Enabled = true;
break;
case "Cancel":
UpdateRowButton.Enabled = false;
break;
case "Update":
UpdateRowButton.Enabled = false;
break;
default:
UpdateRowButton.Enabled = false;
break;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView UpdateRow Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView UpdateRow Example</h3>
<asp:button id="UpdateRowButton"
text="Update Record"
enabled="false"
onclick="UpdateRowButton_Click"
runat="server"/>
<hr/>
<!-- The GridView control automatically sets the columns -->
<!-- specified in the datakeynames property as read-only. -->
<!-- No input controls are rendered for these columns in -->
<!-- edit mode. -->
<asp:gridview id="CustomersGridView"
allowpaging="true"
datasourceid="CustomersSqlDataSource"
autogeneratecolumns="true"
autogenerateeditbutton="true"
datakeynames="CustomerID"
onrowcommand="CustomersGridView_RowCommand"
runat="server">
</asp:gridview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="CustomersSqlDataSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
updatecommand="Update Customers SET CompanyName=@CompanyName, Address=@Address, City=@City, PostalCode=@PostalCode, Country=@Country WHERE (CustomerID = @CustomerID)"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
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 UpdateRowButton_Click(ByVal sender As Object, ByVal e As EventArgs)
' Programmatically update the current record in edit mode.
CustomersGridView.UpdateRow(CustomersGridView.EditIndex, True)
End Sub
Sub CustomersGridView_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
' Enable the UpdateRowButton button only when the GridView control
' is in edit mode.
Select Case e.CommandName
Case "Edit"
UpdateRowButton.Enabled = True
Case "Cancel"
UpdateRowButton.Enabled = False
Case "Update"
UpdateRowButton.Enabled = False
Case Else
UpdateRowButton.Enabled = False
End Select
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView UpdateRow Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView UpdateRow Example</h3>
<asp:button id="UpdateRowButton"
text="Update Record"
enabled="false"
onclick="UpdateRowButton_Click"
runat="server"/>
<hr/>
<!-- The GridView control automatically sets the columns -->
<!-- specified in the datakeynames property as read-only. -->
<!-- No input controls are rendered for these columns in -->
<!-- edit mode. -->
<asp:gridview id="CustomersGridView"
allowpaging="true"
datasourceid="CustomersSqlDataSource"
autogeneratecolumns="true"
autogenerateeditbutton="true"
datakeynames="CustomerID"
onrowcommand="CustomersGridView_RowCommand"
runat="server">
</asp:gridview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="CustomersSqlDataSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
updatecommand="Update Customers SET CompanyName=@CompanyName, Address=@Address, City=@City, PostalCode=@PostalCode, Country=@Country WHERE (CustomerID = @CustomerID)"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server">
</asp:sqldatasource>
</form>
</body>
</html>
Keterangan
UpdateRow Gunakan metode untuk memperbarui rekaman secara terprogram pada indeks yang ditentukan di sumber data. Metode ini biasanya digunakan ketika Anda perlu memperbarui rekaman dari luar GridView kontrol, seperti dari kontrol yang berbeda di halaman.
Catatan
Metode ini hanya dapat dipanggil untuk baris yang saat ini dalam mode edit, atau untuk baris yang berisi kontrol input terikat data dua arah. Untuk informasi selengkapnya tentang ekspresi pengikatan dua arah, lihat Mengikat ke Database.
Untuk menentukan apakah validasi halaman dilakukan sebelum operasi pembaruan, gunakan causesValidation parameter . Memanggil metode ini juga meningkatkan RowUpdated peristiwa dan RowUpdating .
