I am making the pages asp of one library on-linens with visual study 2003. I
have created the datagrid, the subroutine UpdateCommand. .now I want to
avoid to always insert the same element. .someone says me like making? I
would have to make a IF. .but like? In order to help to understand you, I
put you the code vb and that asp of mine web form!
Imports System.Data.SqlClient
Public Class WebForm9
Inherits System.Web.UI.Page
Dim conDatabase_BIBLIOTECA As SqlConnection
Dim cmdSql As SqlCommand
Protected WithEvents dgrdLIBRI As System.Web.UI.WebControls.DataGrid
Dim strSql As String
#Region " Codice generato da Progettazione Web Form "
'Chiamata richiesta da Progettazione Web Form.
<System.Diagnostics.DebuggerStepThrough()Private Sub InitializeComponent()
End Sub
'NOTA: la seguente dichiarazione è richiesta da Progettazione Web Form.
'Non spostarla o rimuoverla.
Private designerPlaceholderDeclaration As System.Object
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: questa chiamata al metodo è richiesta da Progettazione Web Form.
'Non modificarla nell'editor del codice.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Inserire qui il codice utente necessario per inizializzare la pagina
conDatabase_BIBLIOTECA = New SqlConnection("Server=.;database=Database
BIBLIOTECA;Integrated Security=SSPP;Trusted_Connection=Yes")
If Not IsPostBack Then
BindDataGrid()
End If
End Sub
Sub BindDataGrid()
cmdSql = New SqlCommand("SELECT * FROM LIBRI", conDatabase_BIBLIOTECA)
conDatabase_BIBLIOTECA.Open()
dgrdLIBRI.DataSource = cmdSql.ExecuteReader
dgrdLIBRI.DataBind()
conDatabase_BIBLIOTECA.Close()
End Sub
Sub dgrdLIBRI_EditCommand(ByVal source As Object, ByVal e As
DataGridCommandEventArgs)
dgrdLIBRI.EditItemIndex = e.Item.ItemIndex
BindDataGrid()
End Sub
Sub dgrdLIBRI_UpdateCommand(ByVal source As Object, ByVal e As
DataGridCommandEventArgs)
Dim intId_libri As Integer
Dim txtCodice_Rfid As TextBox
Dim TxtTitolo_del_libro As TextBox
Dim strCodice_Rfid As String
Dim strTitolo_del_libro As String
intId_libri = dgrdLIBRI.DataKeys(e.Item.ItemIndex)
txtCodice_Rfid = e.Item.Cells(1).Controls(0)
TxtTitolo_del_libro = e.Item.Cells(2).Controls(0)
strCodice_Rfid = txtCodice_Rfid.Text
strTitolo_del_libro = TxtTitolo_del_libro.Text
strSql = "Update LIBRI Set Codice_Rfid=@Codice_Rfid, " &
"Titolo_del_libro=@Titolo_del_libro Where Id_libri=@Id_libri"
cmdSql = New SqlCommand(strSql, conDatabase_BIBLIOTECA)
cmdSql.Parameters.Add("@Codice_Rfid", strCodice_Rfid)
cmdSql.Parameters.Add("@Titolo_del_libro", strTitolo_del_libro)
cmdSql.Parameters.Add("@Id_libri", intId_libri)
conDatabase_BIBLIOTECA.Open()
cmdSql.ExecuteNonQuery()
conDatabase_BIBLIOTECA.Close()
dgrdLIBRI.EditItemIndex = -1
BindDataGrid()
End Sub
Sub dgrdLIBRI_CancelCommand(ByVal source As Object, ByVal e As
DataGridCommandEventArgs)
dgrdLIBRI.EditItemIndex = -1
BindDataGrid()
End Sub
End Class
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="LIBRI3.aspx.vb"
Inherits="Biblioteca.WebForm9"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm9</title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema"
content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:DataGrid id="dgrdLIBRI" OnEditCommand="dgrdLIBRI_EditCommand"
OnUpdateCommand="dgrdLIBRI_UpdateCommand"
OnCancelCommand="dgrdLIBRI_CancelCommand" DataKeyField="Id_libri"
AutoGenerateColumns="False"
CellPadding="10" HeaderStyle-BackColor="Salmon" style="Z-INDEX: 101; LEFT:
360px; POSITION: absolute; TOP: 120px"
runat="server">
<Columns>
<asp:BoundColumn HeaderText="ID Libri" DataField="Id_libri" ReadOnly="True"
visible="False" />
<asp:BoundColumn HeaderText="Codice Rfid" DataField="Codice_Rfid" />
<asp:BoundColumn HeaderText="Titolo del libro" DataField="Titolo_del_libro"
/>
<asp:EditCommandColumn EditText="Edit!" UpdateText="Update!"
CancelText="Cancel!" />
</Columns>
</asp:DataGrid>
</form>
</body>
</HTML>
