[dba-VB] CodeFirst, DataBinding and audit trailing deleted items on client side

 Here is how the code posted in my two previous postings can be used with a test WinForm with one gridview bound to a DbSet< MyTestEntity> via BidingSource, three test buttons and one test textox. Previously posted and the following code is not used in production nor I plan to use it in production environment soon - this coding is more for learning purposes of CodeFirst approach ( http://www.amazon.com/Programming-Entity-Framework-Code-First/dp/1449312942/ref=sr_1_2?ie=UTF8&qid=1366164644&sr=8-2&keywords=DbContext ) and DbContext ( http://www.amazon.com/Programming-Entity-Framework-Julia-Lerman/dp/1449312969/ref=sr_1_1?ie=UTF8&qid=1366164644&sr=8-1&keywords=DbContext ).

using System;
using System.Windows.Forms;namespace TestWindowsFormsApplication1
{
public partial class TestForm : Form
{
public TestForm()
{
InitializeComponent();
}
private GenericEntityGridViewHandler<MyTestContainer, MyTestEntity> _handler;
private void Form1_Load(object sender, EventArgs e)
{
string sql = "select * from MyTestEntity order by [Name] ASC";
_handler = new GenericEntityGridViewHandler<MyTestContainer, MyTestEntity>(myTestEntityDataGridView, myTestEntityBindingSource, sql);
_handler.LoadData(); 
}
private void cmdSaveAll_Click(object sender, EventArgs e)
{
var report = _handler.SaveChanges();
auditTrailReportTextBox.Text = "";
foreach (var textLine in _handler.GetAuditTrailItemsTestReportString(report))
{
auditTrailReportTextBox.Text += textLine;
}
}
private void cmdReloadData_Click(object sender, EventArgs e)
{
_handler.LoadData(); 
}
private void cmdReportCurrentAuditTrail_Click(object sender, EventArgs e)
{
auditTrailReportTextBox.Text = "";
foreach (var textLine in _handler.GetAuditTrailItemsTestReportString(_handler.AuditTrailItems ) )
{
auditTrailReportTextBox.Text += textLine;
}
}
}
} Thank you.

-- Shamil


Среда, 17 апреля 2013, 5:39 +04:00 от Salakhetdinov Shamil <mcp2004 at mail.ru>:
>Hi Scott --
>
>Thank you for your sample. I have prepared mine, which I will post here in several subsequent posts as one posting limit is 20KB.
>
>By "individual changes" I mean *all* the data changes happened between data load and data saving, And I wanted to "capture" that individual data changes as soon as they happen not before .SaveChanges() call.
<<< skipped >>>
>