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Sorry friend , but in can't implement your suggestions to my expression. What can I change to my expression because I'm using reflection , and I know only this to get the current value :
.GetValue(obj, Nothing)
How to get the original value.
There's no .GetCurrentValue.
Please look my expression .
Thank you !
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Dim entry As DbEntityEntry = yourContext.Entry(obj)
Dim values = obj.GetType.GetProperties.Where(Function(t2) t2.PropertyType.IsValueType).ToDictionary(Function(p) p.Name, Function(p) New With {
.CurrentValue = entry.CurrentValues(p.Name),
.OriginalValue = entry.OriginalValues(p.Name)
})
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Ofc, it is not a classic property; Is the entries' Property property by any chance an indexer than returns a DbPropertyEntry class?
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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Yes, the DbEntityEntry's Property function returns a DbPropertyEntry.
DbEntityEntry.Property Method[^]
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Can this be a solution :
obj=context.entry(obj).OriginalValues.ToObject
Dim values = obj.GetType.GetProperties.Where(Function(t2) t2.PropertyType.IsValueType).Select((Function(t3) New With { _
.property = t3.Name, _
.value = t3.GetValue(obj, Nothing) _
})).ToDictionary(Function(x) x.property, Function(y) y.value)
So I can lave my expression unchanged
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Yes, that should work.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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i need carshowroom mangement system project
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Well you newed to do one of two things:
- Write it yourself.
- Pay someone else to write it for you.
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Well in plain TSQL it was pretty simple to calc the total amount of taxable items.
SELECT
SUM((qty * Price) - (qty * InstantSavings))
FROM ShoppingCart
WHERE SessionID = @SessionID
AND Taxable=1
I've gotten this far, pretty sure I'm on the right track here.
But I don't understand where "totals" come from in my statement. I mean yes I put it there because multiple examples used it, but the examples were just snippets.
I simply don't get it.
Dim pValue As Decimal = 0
Using context As New DBContext()
Dim totals as what?
pValue = _
(
From sc In context.ShoppingCart
Where sc.SessionID = p_sessionID _
And sc.Taxable = True
Group sc By sc.SessionID Into totals()
Select
{
total = totals.Sum(Function(m) (m.Qty * m.Price) - (m.Qty * m.InstantSavings))
}
)
End Using
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I'll go with this, it doesn't work in Linq Pad, but it looks right so far
Dim pValue As Decimal = 0
Using context As New hx5Context()
pValue = _
(
From sc In context.ShoppingCart
Where sc.SessionID = p_sessionID _
And sc.Taxable = True
Select (sc.Qty * sc.Price) - (sc.Qty * sc.InstantSavings)
).DefaultIfEmpty().Sum()
End Using
Return pValue
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pls help !!!
USERID TIMEINOUT CHECKTYPE
120 1/2/2015 04:30:45 AM I
120 1/2/2015 07:50:45 AM O
120 1/2/2015 09:30:45 AM I
120 1/2/2015 02:20:45 PM O
120 1/2/2015 04:10:45 PM I
120 1/2/2015 05:50:45 PM O
135 1/2/2015 07:30:45 AM I
135 1/2/2015 09:40:45 AM O
135 1/2/2015 12:30:45 PM I
135 1/2/2015 02:10:45 PM O
output:
userID date timeIn timeOut
120 1/2/2015 04:30:45 07:50:45
120 1/2/2015 09:30:45 02:20:45
120 1/2/2015 04:10:45 05:50:45
135 1/2/2015 07:30:45 09:40:45
135 1/2/2015 12:30:45 02:10:45
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This article [^]may help...
Never underestimate the power of human stupidity
RAH
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that is the reality output in biometrix...
can you help me??
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Doesn't look like a pivot comes from set 1 to 2 - what am I missing?
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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I wrote this as a substritute for bulk Transfer or Select insert.
It's the same exact table columns, just being copied for archival purposes.
But I get this error, "error updating entity",
really generic. So I think I missed the boat on this one, in terms of how I thought it works.
Using context as new DBContext()
Dim r = _
(
From pi In context.ProductInfo
Where pi.ProductID = p_Product_ID
Select New productBulkTransfer With
{
.PartNumber = pi.PartNumber,
..... 30 more columns
}
).SingleOrDefault()
Dim w As New PRODUCTINFO_RECYCLEBIN With
{
.PartNumber = r.PartNumber,
..... 30 more columns
}
context.ProductInfo_RecycleBin.Add(w)
context.SaveChanges()
End Using
I tried Dim r = ... .ToList()
But the w side, write complained about it in teh context.Add(w)
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It was an error in my DataAccessLayer
I tried to take a shortcut in that model, by inheriting the original model, didn't work
Thought I'd try it, but that was last Monday, and forgot about it.
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Dim CMD3 As New OleDb.OleDbCommand
SQL = "insert into reciptdetails" +
"(Reciptid,Barcode,Itemcount,Itembuyprice,Itemsellprice)" +
"values" +
"(:0 ,:1 ,:2 ,:3 ,:4 )"
CMD3.Connection = Myconnection
CMD3.Transaction = Mytransaction
CMD3.CommandText = SQL
CMD3.Parameters.AddWithValue(":0", reciptid)
CMD3.Parameters.AddWithValue(":1", Barcode)
CMD3.Parameters.AddWithValue(":2", Itemcount)
CMD3.Parameters.AddWithValue(":3", BuyPrice)
CMD3.Parameters.AddWithValue(":4", SellPrice)
CMD3.ExecuteNonQuery()
CMD3.Dispose()
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So I'm working on a report using RDLC for a Windows App.
In the report, there are product items, basically a margin report.
So the customer told me that the final totals of cost, price and margin are off, but the line items are correct. OK.
the method loops a list(of invoiceProfit) from a database function
And there are positive, negative and 0 values in the List(of invoiceProfit)
I never manually added numbers in VB before, and have always used SQL Server to do this.
On a small report with a couple of items, its correct, but on a large report with 1000 items, it's off.
Question:
I'm missing something here on this, and I'm not sure what to think.
I think the += just adds numbers, even if the value is negative.
FYI:
I need to get back to the progress bar issue later today, perhaps now. I'll get back to that post later today or tomorrow.
m_totalCost += i.ExtCost
m_totalPrice += i.ExtPrice
m_totalMargin += m_margin
This method produces these values
If (i.ExtCost > 0) Then
m_totalCost = m_totalCost + i.ExtCost
ElseIf (i.ExtCost < 0) Then
m_totalCost = m_totalCost - i.ExtCost
End If
If (i.ExtPrice > 0) Then
m_totalPrice = m_totalPrice + i.ExtPrice
ElseIf (i.ExtPrice < 0) Then
m_totalPrice = m_totalPrice - i.ExtPrice
End If
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That second group of statements is likely incorrect. The first looks OK. They will definitely produce different results given the same data (if it contains negative values).
And then publish the bad code here: WeirdAndWonderful[^]
modified 30-Jul-15 17:54pm.
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The second code block is definitely wrong - subtracting a negative number has the same effect as adding its absolute value.
1 + (-1) = 0
1 - (-1) = 2
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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I didn't think of it that way.
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Hi,
We have a VB.2010 32 bit Windows Desktop program that has been running for years. It uses an Excel (2010 in this case) database which is accessed through a connectionless OLEDB connection string as
Provider=Microsoft.ACE.OLEDB.12.0;DATA SOURCE='L:\accnt\CustomerFiles\DATABASE 2015.xlsm'; Extended Properties="Excel 12.0 Xml;HDR=YES"
Normally it works fine but on some systems we get a
3706 Provider cannot be found.
It has failed and worked on different W2012R2 systems. It also has failed on Windows 8.1 (64b).
On W8.1 have tried installing AccessDataEngine_x64 but it did not help (32 bit version would not install).
Can anyone help?
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