You may click in a cell in the datagrid and change its
contents. But when you refresh your page all changes will be ignored. So, after
changing the info you should store it in the database.
First, insert the code below into your Contact.vb Class
Update code in contact class
Public Sub UpdateContact()
Dim arParms() As SqlParameter = New SqlParameter(3) {}
arParms(0) = New SqlParameter("@IDContact", Data.SqlDbType.VarChar, 38)
arParms(0).Value = _IDContact
arParms(1) = New SqlParameter("@City", Data.SqlDbType.VarChar, 100)
arParms(1).Value = demo.Functions.NullSafeString(_City,
DBNull.Value.ToString)
arParms(2) = New SqlParameter("@Address", Data.SqlDbType.VarChar, 100)
arParms(2).Value = demo.Functions.NullSafeString(_Address,
DBNull.Value.ToString)
arParms(3) = New SqlParameter("@Name", Data.SqlDbType.VarChar, 100)
arParms(3).Value = demo.Functions.NullSafeString(_Name,
DBNull.Value.ToString)
SqlHelper.ExecuteNonQuery(demo.Config.Connectionstring,
Data.CommandType.StoredProcedure, "O_Upd_Contact", arParms)
End SubThis will call stored procedure O_Upd_Contact.
So, implement this stored procedure.
Stored procedure for O_Upd_Contact
USE [yentel]
GO
/****** Object: StoredProcedure [eilering].[O_Upd_Contact] Script Date:
08/17/2011 13:10:11 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [eilering].[O_Upd_Contact]
(
@IDContact varchar (38),
@Name varchar (100),
@Address varchar (100),
@City varchar (100)
)
AS
SET NOCOUNT ON
Update Contact
SET
Name = @Name,
Address = @Address,
City = @City
WHERE IDContact = @IDContact
Then you should modify the servicereference
Modify IService.vb
Code for IService.vb for updating
Imports System.ServiceModel
' NOTE: You can use the "Rename" command on the context menu to change the
' interface name "IService1" in both code and config file together.
<ServiceContract()>
Public Interface IService1
<OperationContract()>
Sub DoWork()
<OperationContract()> _
Function FindContactList() As List(Of demo.Contact)
<OperationContract()> _
Function UpdateContactList(ByVal ModifiedRow As demo.Contact)
End Interface
Code for Service1.svc.vb for updating
Imports System.Data.SqlClient
' NOTE: You can use the "Rename" command on the context menu to change the class
' name "Service1" in code, svc and config file together.
Public Class Service1
Implements IService1
Public Sub DoWork() Implements IService1.DoWork
End Sub
Public Function FindContactList() As List(Of demo.Contact) Implements
IService1.FindContactList
Return New ContactManager().FindContactList()
End Function
Public Function UpdateContactList(ByVal ModifiedRow As demo.Contact)
Implements IService1.UpdateContactList
ModifiedRow.UpdateContact()
End Function
Public Class ContactManager
Public Function FindContactList() As List(Of demo.Contact)
Dim OContact As demo.Contact
OContact = New demo.Contact
Dim Bdr As System.Data.SqlClient.SqlDataReader ' IS CLOSED BELOW F
Bdr = OContact.GetsContactAll
Dim ContactList = New List(Of demo.Contact)()
If Bdr IsNot Nothing Then
Do While Bdr.Read()
Dim NewContact = CreateNewContact(Bdr)
ContactList.Add(NewContact)
Loop
End If
Bdr = Nothing
Return ContactList
End Function
Private Function CreateNewContact(ByVal rdr As SqlDataReader) As
demo.Contact
Dim NewContact = New demo.Contact With {
.IDContact = rdr("IDContact").ToString(),
.Name = rdr("Name").ToString(),
.Address = rdr("Address").ToString(),
.City = rdr("City").ToString()
}
Return NewContact
End Function
End Class
End ClassHere a new function UpdateContactList is inserted for
updating. It expects a row from the datagrid after modifying it. Before going
on, build your solution.
Then you should update your servicereference by right
clicking your ServisReference1 and selecting Update Service reference.
This MUST be done before you can use the update function in
your MainPage.aspx.vb code.
If you insert the update code in your MainPage.aspx.vb code
before updating your reference, you get an error.
Then you should include the code which handles the
modification in your mainPage.aspx.vb
Code for handling updates from datagrid.
Private Sub DataGrid1_RowEditEnded(ByVal sender As Object, ByVal e As
System.Windows.Controls.DataGridRowEditEndedEventArgs) Handles
DataGrid1.RowEditEnded
<span lang=NL> </span>'TAKE THE MODIFIED ROW
Dim ModifiedRow As ServiceReference1.Contact = New
ServiceReference1.Contact
ModifiedRow = CType(sender, DataGrid).SelectedItem
'UPDATE THE DATABASE
Dim proxy As ServiceReference1.Service1Client = New
ServiceReference1.Service1Client
AddHandler proxy.UpdateContactListCompleted, AddressOf
GetUpdateContactcompleted
proxy.UpdateContactListAsync(ModifiedRow)
End Sub
Sub GetUpdateContactcompleted(ByVal sender As Object, ByVal e As
ServiceReference1.UpdateContactListCompletedEventArgs)
Dim proxy As ServiceReference1.Service1Client = New
ServiceReference1.Service1Client
AddHandler proxy.FindContactListCompleted, AddressOf GetContactcompleted
proxy.FindContactListAsync()
End Sub
When you have finished editing, DataGrid1_RowEditEnded is
called. As seen before, first the proxy is created and a handler is added to
the servicereference1 UpdateContactListCompleted routine. If this routine is
finished GetUpdateContactcompleted is called.
If you have changed the information in the database you have
to refresh the data in your datagrid because there may be others who have
modified other records. So after updating call FindContactListAsync again.
