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foreach only works on .NET classes that impliment IEnumerable. If this is some sort of collection and I assume it is, it's not one that supports foreach. Just do a normal for loop instead.
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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Hello everybody in the problem solving world !!!!.........
Well I have come across a unique problem and am not able to find any logic behind that.
My vb.net application runs on a sql server 2000 and it is about making bills in a fast running gift counter with 5 to 6 client and server is placed at a distance of 200 meters. The store sells maximum of 50-60 gifts. The user does all the transaction through clicks.
Two tables are involved for making a transaction. One is mastertable and detailtable.
In the mastertable my application is inserting the total of the bill, date, amount and the counter person’s code. It then generates an auto number which I picks up after the data is inserted in the mastertable and then uses the same in the detailtable.
The detailtable holds fields like item, qty, rate,id of mastertable etc.
My application is running smooth, but recently I noticed that say one in 500th time, row is not added to mastertable while it is present in detailtable with the id of mastertable. I have binded the sql with commit. I have digged my code but am not finding any logic behind this error.
Please help. Thanks in advance.
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If your detail table uses an id that refers to the master table, then the code to get that id must be broken, or the record is getting deleted. Do they have a foreign key relationship in your DB ?
Entering it all in a single transaction, in a stored proc, is the best way to do this
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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Hi,
There are many Cases of Generation this type of Problem
Like
Many time Open Connection
Sql Query Error
Database Field Property Error
Can U Send Me Query and Database Table Property.I Can Halp U.
 Thanks 
Anubhava Dimri
919250168195
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Here is the code:
con = connect()
con.Open()
'transaction begins here-------
trans = con.BeginTransaction()
Try
'Data is inserted into mastertable---------
cmd = New SqlClient.SqlCommand("INSERT INTO mastertable(mbno,mbdate,mbamount,mbcperson) VALUES(" & counter_bill_no & ",'" & server_date & "'," & billvalue & "," & countercode & ")", con, trans)
cmd.ExecuteNonQuery()
cmd = New SqlClient.SqlCommand("select mbid from mastertable WHERE mbno=" & counter_bill_no & " and mbcperson=" & countercode & " ", con, trans)
mb_id = cmd.ExecuteScalar
'Data inserted into detailtable-----------
i = 0
For i = 0 To row_no - 1
selling_rate = DataGridView1.Item(2, i).Value
If selling_rate <> 0 Then
cmd = New SqlClient.SqlCommand("INSERT INTO detailtable(dbno,dbdate,dbicode,biquantity,dbamount) VALUES(" & mb_id & ",'" & server_date & "'," & DataGridView1.Item(4, i).Value & "," & DataGridView1.Item(1, i).Value & "," & DataGridView1.Item(3, i).Value & ")", con, trans)
cmd.ExecuteNonQuery()
End If
Next i
'Data commited--------
trans.Commit()
Catch ex As Exception
trans.Rollback()
MsgBox("Bill could not be generated, Please try again.")
End Try
con.Close()
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Thanks.
Well my table as yet doesnt have the foreign key relationship. This is the code am using at present:
con = connect()
con.Open()
'transaction begins here-------
trans = con.BeginTransaction()
Try
'Data is inserted into mastertable---------
cmd = New SqlClient.SqlCommand("INSERT INTO mastertable(mbno,mbdate,mbamount,mbcperson) VALUES(" & counter_bill_no & ",'" & server_date & "'," & billvalue & "," & countercode & ")", con, trans)
cmd.ExecuteNonQuery()
cmd = New SqlClient.SqlCommand("select mbid from mastertable WHERE mbno=" & counter_bill_no & " and mbcperson=" & countercode & " ", con, trans)
mb_id = cmd.ExecuteScalar
'Data inserted into detailtable-----------
i = 0
For i = 0 To row_no - 1
selling_rate = DataGridView1.Item(2, i).Value
If selling_rate <> 0 Then
cmd = New SqlClient.SqlCommand("INSERT INTO detailtable(dbno,dbdate,dbicode,biquantity,dbamount) VALUES(" & mb_id & ",'" & server_date & "'," & DataGridView1.Item(4, i).Value & "," & DataGridView1.Item(1, i).Value & "," & DataGridView1.Item(3, i).Value & ")", con, trans)
cmd.ExecuteNonQuery()
End If
Next i
'Data commited--------
trans.Commit()
Catch ex As Exception
trans.Rollback()
MsgBox("Bill could not be generated, Please try again.")
End Try
con.Close()
As for Stored Procedures, i dont know much about it, what are the advantage of them.
Regards.
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Hi Dear,
Your Query is very good ? But you must to Check that what type of Data is going on the Database regarding the Database Properties.For this error you can use BreakPoint.
And For Date Value You Can Use # Operator. Just Like #12/12/2007#
My Modification on this Query
cmd = New SqlClient.SqlCommand("INSERT INTO mastertable(mbno,mbdate,mbamount,mbcperson) VALUES(" val(counter_bill_no) ",#" server_date "#," val( billvalue) "," val(countercode)")", con, trans)
Pls try and Reply
 Anubhava Dimri ![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
919250168195
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Are you using a stored procedure to update the table (presumably with a transaction)
Put a foriegn key constraint on the detail table requirng a master table record. This willstop the orphan records being created in the database but will not stop the attempt. It may highlight when the transaction is failing.
When you say autonumber I presume you are using IDENTITY, this being returnd to the client for the child records to use.
A little more info about your operation (SQL) is required.
Never underestimate the power of human stupidity
RAH
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Thanks for the reply.
Here is the code:
con = connect()
con.Open()
'transaction begins here-------
trans = con.BeginTransaction()
Try
'Data is inserted into mastertable---------
cmd = New SqlClient.SqlCommand("INSERT INTO mastertable(mbno,mbdate,mbamount,mbcperson) VALUES(" & counter_bill_no & ",'" & server_date & "'," & billvalue & "," & countercode & ")", con, trans)
cmd.ExecuteNonQuery()
cmd = New SqlClient.SqlCommand("select mbid from mastertable WHERE mbno=" & counter_bill_no & " and mbcperson=" & countercode & " ", con, trans)
mb_id = cmd.ExecuteScalar
'Data inserted into detailtable-----------
i = 0
For i = 0 To row_no - 1
selling_rate = DataGridView1.Item(2, i).Value
If selling_rate <> 0 Then
cmd = New SqlClient.SqlCommand("INSERT INTO detailtable(dbno,dbdate,dbicode,biquantity,dbamount) VALUES(" & mb_id & ",'" & server_date & "'," & DataGridView1.Item(4, i).Value & "," & DataGridView1.Item(1, i).Value & "," & DataGridView1.Item(3, i).Value & ")", con, trans)
cmd.ExecuteNonQuery()
End If
Next i
'Data commited--------
trans.Commit()
Catch ex As Exception
trans.Rollback()
MsgBox("Bill could not be generated, Please try again.")
End Try
con.Close()
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Hi, I would like to get into a listbox all the field names from my access DB.
eg: fields ID, Name, Phone....
I have open a connection, created a dataset called Mydatatable and added data into a datagridview.
mydatatable = ds.Tables("test")
mydatagrid.DataSource = mydatatable
Then i've used LbListDB.DataSource = mydatagrid.Columns but here i get something not really nice like name + index...
I just want to get the name.
How can I do?? I suppose I have to use something like LbListDB.ValueMember= ??
Thx Tchouny
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You Can use secondory style
after open the connection with the Data base you can insert data One by one
While Rs.Read = true
listbox.items.add Rs.Reader("ABC");
end while
Anubhava Dimri
919250168195 
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hi,
use following statements
For i As Integer = 0 To mydatatable.Columns.Count - 1<br />
LbListDB.items.add(mydatatable.Columns(i).ColumnName)<br />
Next
hope this helps
Rupesh Kumar Swami
Software Engineer,
Integrated Solution,
Bikaner (India)
My Company
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It works fine. Thx a lot.
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I want to display and select multiple related data in one control.
i will have to update the selected data in database again.
can anyone suggest me what control to use on form.?? with code
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You Can Use Data Grid For This Action.
Anubhava Dimri
anubhava.prodata@gmail.com
9250168195
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If you're using .NET 2.0 or above, the DataGridView control is better than the (now deprecated, if not, it should be) DataGrid control.
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You got the answer to this question earlier today.
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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By using Vb.Net how to get Domain name or user name
Hitesh sojitra
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Hi Hitesh,
You may use My object to get the desired results:
My.User.Name
Best Regards,
Sam Xavier
www.componentone.com
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<b>By using DirectoryEntry U can find Domain Name and then Use SchemanClassName for Getting Domain Related information </b>
Dim childEntry As DirectoryEntry
Dim ParentEntry As New DirectoryEntry()
ParentEntry.Path = "WinNT:"
Dim newNode As New TreeNode(childEntry.Name)
Select Case childEntry.SchemaClassName
Case "Domain"
txt_domainname =(childEntry.Name){ParentDomain})
Regard
Anubhava
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Hi
I have one problem.I want to increment alphabetic(A to Z).
suppose i have one record in database as A then my next record has to save as
"B".This would be upto "Z".How to do that with minimized code?
How can i increment with A to Z?
Pls help me.
Thanks
monika
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Hello Monika,
You may try retrieving the ascii value for the record and then increment the ascii value and
then store back the back the value after charracter conversino.
Lets Say we have 'A' as value. Its ascii value is 65.
We increment this to 66 and convert it back to 66 which will save as 'B'.
You can try the given code. In this code snippet, I am adding the values in a button click which
add A-Z on each click.
<br />
If Me.ListBox1.Items.Count = 0 Then<br />
<br />
Me.ListBox1.Items.Add("A")<br />
<br />
Else<br />
<br />
Dim ch As String<br />
<br />
ch = Me.ListBox1.Items.Item(Me.ListBox1.Items.Count - 1)<br />
<br />
Dim num As Integer<br />
<br />
num = (Asc(ch) + 1) ' Gets the Ascii value of the last chrracter and increments it.<br />
<br />
Me.ListBox1.Items.Add(ChrW(num)) ' Converts the ascii value to charracter<br />
<br />
End If
Just try implementing it. I think this should give you a hint.
Hope this helps.
Regards,
Allen
Allen Smith
Software Engineer
ComponentOne LLC
www.componentone.com
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char x = 'A';
for (int i = 0; i < 100; i++)
{
x++;
x = x > 'Z' ? 'A' : x;
Console.WriteLine(x.ToString());
}
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