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hi, i am new vb learner and i want to change date variable to string variable is there any build in function in vb6?
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If you're new, I recommend dropping VB6, which is obsolete, unsupported and nasty. VB.NET 2005 express edition is free from Microsoft.
And, in VB.NET, the ToString method would do what you're after.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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CStr(yourdate) should do it.
That said I 100% agree with Christian. Don't learn VB6 - it will only teach you bad practices. And why bother when Visual Studio Express is free?
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Hello I'm trying to get time difference for each record in my datagrid - but I'm currently having problems with my loop - I'm only getting the time difference for the first record - Help will be really appreciated. In this example I'm using a for each - any ideas will be great...
Dim d1 As DateTime = conv
Dim d2 As DateTime = System.DateTime.Today
Dim subtract, absday
subtract = 0
'gworkdays = DateDiff("d", d1, d2)
Dim rec As DataRowView
'Dim x As Integer
'Do Time Calculation for each record
For Each rec In dgOrderReport.DataSource
Select Case DatePart("w", d1)
Case 1
subtract = subtract + 1
Case 7
subtract = subtract + 2
End Select
Select Case DatePart("w", d2)
Case 1
subtract = subtract + 2
Case 7
subtract = subtract + 1
End Select
absday = DateDiff("d", d1, d2) + 1 - subtract
fncGetDays = absday - CInt(2 * (absday \ 7))
If fncGetDays < 0 Then fncGetDays = 0
'x = x + 1
Next rec<code></code>
Thank You
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KA National Marker wrote: For Each rec In dgOrderReport.DataSource
rec is your record - where in your code do you use this value ?
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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As of right now in the above code rec is set as my DataRowView
'Dim rec As DataRowView ~~~ which not correct what so ever
I'm really having problems with the syntax with the FOR Loop
Thank you for the response.
Thank You
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The issue is, you're using a for loop to iterate over the data, rec each time is a datarowview. I'm not familiar with this class, but I assume it represents a view into a row of your data. So, my question was, why are you not using this variable to access data from that row, which is surely what the loop is for ? Unless there's some VB magic going on here, you ignore the 'rec' variable which presumably contains the values for the row you want to process, which means you process the same data each time ( whatever that is )
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I'm still not 100% getting it...Also I'm not really familiar with this DataRowView class I've seen it used for datagrid search in the past I believe.
I dont believe I'm ignoring the rec variable. Unless your saying within that loop I will have to tell it to go to the next rec? Make Sense...
Dim rec As DataRowView
'Dim x As Integer
'Do Time Calculation for each record
For Each rec In dgOrderReport.DataSource
Next rec<code></code>
Thank You
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KA National Marker wrote: I dont believe I'm ignoring the rec variable.
Where do you reference it within the loop ? You reference d1 and d2, which are never changed. So, you will end up with the same values each time.
For Each rec In dgOrderReport.DataSource
Select Case DatePart("w", d1)
Case 1
subtract = subtract + 1
Case 7
subtract = subtract + 2
End Select
Select Case DatePart("w", d2)
Case 1
subtract = subtract + 2
Case 7
subtract = subtract + 1
End Select
absday = DateDiff("d", d1, d2) + 1 - subtract
fncGetDays = absday - CInt(2 * (absday \ 7))
If fncGetDays < 0 Then fncGetDays = 0
'x = x + 1
Next rec
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I now understand exactly what you mean about not referencing 'rec' within my loop - I wasn't able to successfully reference it because of the lack of knowledge I have with the Class I was using so I changed the code just a bit -
I decided to use a the currency manager to count each row, and I'm now using a do while - now my problem is my specified cast is not valid - which I'm assuming is because I'm using the wrong class for rec to compare it to my datagrid...Help will be great - Thanks...
Dim rec As Object
Dim cm As CurrencyManager = CType(BindingContext(dgOrderReport.DataSource), CurrencyManager)
Dim rowcount As Integer = cm.Count
Dim row As Integer = 0
Do While row < rowcount
For Each rec In dgOrderReport.Item(row, 3)
Select Case DatePart("w", d1)
Case 1
subtract = subtract + 1
Case 7
subtract = subtract + 2
End Select
Select Case DatePart("w", d2)
Case 1
subtract = subtract + 2
Case 7
subtract = subtract + 1
End Select
absday = DateDiff("d", d1, d2) + 1 - subtract
fncGetDays = absday - CInt(2 * (absday \ 7))
If fncGetDays < 0 Then fncGetDays = 0
row = +1
Next rec
Loop<code></code><code></code>
Thank You
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Hi All,
I have list of html files for online documentation of VBA.
Can any one tell me how to generate *.chm file from html files.
I am trying to get Dynamic Help using Ctrl+F1 using chm file.
Also how to link the chm file to Ctrl+F1 key?
Thanks In Advance.
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Look for .chm compiler. I think it may allow you to convert .html, I'm not 100% on that.
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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'''
''' Populates the DataGridView
'''
Private Sub PopulateDataGridView()
' Set the column header names.
userAccessGrid.ColumnCount = 5
userAccessGrid.RowsDefaultCellStyle.BackColor = Color.White
userAccessGrid.RowHeadersVisible = True
userAccessGrid.Name = "User Access Grid"
userAccessGrid.ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Raised
userAccessGrid.CellBorderStyle = DataGridViewCellBorderStyle.Raised
userAccessGrid.ColumnHeadersHeight = 20
' Initialize basic DataGridView properties.
userAccessGrid.Dock = DockStyle.Fill
userAccessGrid.BackgroundColor = Color.LightGray
userAccessGrid.BorderStyle = BorderStyle.Fixed3D
userAccessGrid.Columns(0).Name = "AccessLevelDescription"
userAccessGrid.Columns(0).DataPropertyName = "AccessLevelDescription"
userAccessGrid.Columns(0).Width = 40
userAccessGrid.Columns(0).HeaderText = "Access Level Description"
userAccessGrid.Columns(0).DefaultCellStyle.Font = New Font("Arial", 7, FontStyle.Regular)
userAccessGrid.Columns(1).Name = "NoAccess"
userAccessGrid.Columns(1).DataPropertyName = "NoAccess"
userAccessGrid.Columns(1).Width = 40
userAccessGrid.Columns(1).HeaderText = "No Access"
userAccessGrid.Columns(1).DefaultCellStyle.Font = New Font("Arial", 7, FontStyle.Regular)
userAccessGrid.Columns(2).Name = "ReadOnly"
userAccessGrid.Columns(2).DataPropertyName = "ReadOnly"
userAccessGrid.Columns(2).Width = 40
userAccessGrid.Columns(2).HeaderText = "Read Only"
userAccessGrid.Columns(2).DefaultCellStyle.Font = New Font("Arial", 7, FontStyle.Regular)
userAccessGrid.Columns(3).Name = "NormalAccess"
userAccessGrid.Columns(3).DataPropertyName = "NormalAccess"
userAccessGrid.Columns(3).Width = 40
userAccessGrid.Columns(3).HeaderText = "Normal Access"
userAccessGrid.Columns(3).DefaultCellStyle.Font = New Font("Arial", 7, FontStyle.Regular)
userAccessGrid.Columns(4).Name = "TotalAccess"
userAccessGrid.Columns(4).DataPropertyName = "TotalAccess"
userAccessGrid.Columns(4).Width = 40
userAccessGrid.Columns(4).HeaderText = "Total Access"
userAccessGrid.Columns(4).DefaultCellStyle.Font = New Font("Arial", 7, FontStyle.Regular)
userAccessGrid.SelectionMode = DataGridViewSelectionMode.CellSelect
userAccessGrid.MultiSelect = False
userAccessGrid.BackgroundColor = Color.LightBlue
userAccessGrid.ColumnHeadersDefaultCellStyle.Font = New Font("Arial", 8, FontStyle.Regular)
'--------------------------------------------------------------------------------------------
Dim appdesc_selectStatement As String = "Select access.level, pas_appitem FROM(access)Where access.uname = '' ORDER BY appitem"
Dim level_selectStatement As String = "Select accitem.appdesc, acclevels.level, accitem.appitem FROM(accitem, acclevels, access)Where access.uname = '' And accitem.appitem = access.appitem And access.level = acclevels.level Order By accitem.appitem"
Dim dt_Appdesc As New DataSet()
v = clsDataAnalyzerJetOleDb.MSAccessOleDb.PopulateDataSet(appdesc_selectStatement)
Dim dt_Level As New DataSet()
dt_Level = clsDataAnalyzerJetOleDb.MSAccessOleDb.PopulateDataSet(level_selectStatement)
Dim ds As DataSet = New DataSet()
Dim Dt_UserAccessDataSet As New DataSet()
Dim DescriptionColumns() As DataColumn = New DataColumn() {ds.Tables(0).Columns("appitem"), ds.Tables(0).Columns("appdesc")}
Dim AccessLevelColumns() As DataColumn = New DataColumn() {ds.Tables(1).Columns("level"), ds.Tables(1).Columns("desc")}
Dim Tran_Detail As New DataRelation("DescriptionColumns", ds.Tables(0).Columns("AccessLevelDescription"), AccessLevelColumns(1).Columns("No Access", "ReadOnly", "NormalAccess", "TotalAccess"))
'Dim tablearray() As DataTable = New DataTable(3) {}
'tablearray(0) = dt_Appdesc.Tables("appitem")
'tablearray(1) = mySecondDataSet.Tables("AnotherTable")
'tablearray(2) = myThirdDataSet.Tables(0)
'get a DataTableReader over these tables
'myDataTableReader = myFirstDataSet.GetDataReader(tablearray)
' Section for filling the Fields after the Data has been looped and read into the Grid
Dim OleDBConn As OleDbConnection = New OleDbConnection(MSAccessOleDb.ConnectionString())
OleDBConn.Open()
Dim cmd As OleDbCommand = New OleDbCommand("appdesc_selectStatement", dt_Appdesc)
Dim daTransactions As OleDbDataAdapter = New OleDbDataAdapter(cmd)
daTransactions.Fill(ds, "dt_Appdesc")
Dim cmdDetails As OleDbCommand = New OleDbCommand("level_selectStatement", dt_Level)
Dim daTransactionDetails As OleDbDataAdapter = New OleDbDataAdapter(cmdDetails)
daTransactionDetails.Fill(ds, "dt_Level")
DataRelations(Of String, DescriptionColumns(), AccessLevelColumns(), Boolean)()
Dim dx As New DataGridViewTextBoxColumn() = New DataGridViewTextBoxColumn()
'Pass in ds as DataSet, and "Transactions as TblName
Dim userAccessDataRow As DataRow = dt_Appdesc.NewRow()
Dim userAccessDataAdapter As New OleDbDataAdapter()
For Each userAccessDataRow As DataRow
Dim i As Integer
For i = 0 To dt_Appdesc.Rows.Count - 1
'Loop through Query B
'For each Row in DataTableB
For Each userAccessDataRow As DataRow In userAccessTable.Rows
'The level from the query associates to the proper checkbox in the row
accessQuery = accessQuery + 1
'Loop Through Query A's DataTable
i = 0
For Each userAccessDataRow In userAccessTable.Rows
userAccessTable.Columns(1)(0) = userAccessDataRow(0)(1).value
'i = i + 1 'So, that we continue looping
'Level2 = Row(0).value
'If Level2 = Level1 Then 'Set the level
CheckBox in Column(1)
Exit For
Exit For
Next
Next
Next
Next
Try
' Section for filling the Fields after the Data has been looped and read into the Grid
If dt_Appdesc.Rows.Count = 0 Then
Dim OleDBConn As OleDbConnection = New OleDbConnection(GetOleDBConn())
OleDBConn.Open()
userAccessDataAdapter.SelectCommand = New OleDbCommand(appdesc_selectStatement, OleDBConn)
userAccessDataAdapter.Fill(dt_Appdesc)
userAccessDataAdapter.InsertCommand = New OleDbCommandBuilder(userAccessDataAdapter).GetInsertCommand()
userAccessDataRow("uname").Trim()
dt_Appdesc.Rows.Add(userAccessDataRow)
OleDBConn.Close()
OleDBConn.Dispose()
Else
Throw (New Exception("Error attempting to insert duplicate data."))
End If
Catch messerr As Exception
Call ShowErrorMessage(messerr, "listboxUserGroup_SelectedIndexChanged", "frm_security")
End Try
' Add the rows to the DataGridView.
Dim rows() As Object = {}
Dim rowArray As Object()
For Each rowArray In rows
userAccessGrid.Rows.Add(rowArray)
Next rowArray
' Adjust the row heights so that all content is visible.
userAccessGrid.AutoResizeRows(DataGridViewAutoSizeRowsMode.AllCellsExceptHeaders)
End Sub
Here's my nasty 150 line DataSet, DataRelation, DataObject, DataBullshit problem. As you can tell, this isn't the first day that I've been working on this function. If you have any bones to through in my general direction, I'd be incredibly grateful. My goal is to get a two Datasets and combine them after I take the user access level and turn it sideways. Then populate the gridview, then I'm going to write back to the database from the selected values.
Gridview looks like
Appdesc NoAccess Read-Only Normal Total Access
blah blah X X X X
blah blah X X X X
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Is this written in Access VB, VB6 or VB.NET ? A lot depends on the answer to this question. You are right about one thing though, this is nasty. (You have actually hard coded the entire gridview.)
I will throw you this bone: get .Net Studio, put a datagrid on a form, link it to your dataset, and populate the dataset. Of all the code, you will only have to write about 20 lines, if that much.
Necessary changes can be made directly to the dataset structure, or the database, and your grid will adapt itself to the changes.
If you are already using a version of .net studio, then you really need to let go of these old vb6 habits.
Good luck,
Johan
My advice is free, and you may get what you paid for.
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Hi everybody. I'm using enterprise library 3.1 and vb 2005. I want to build a data access layer but I don't know where I can start.
It's my first time using patterns so I hope you can help me.
I had installed and build the application block but I don't know how use them.
JESHU
-- modified at 17:47 Tuesday 21st August, 2007
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You are going to have to start with the documentation (and lots of it). The enterprise library is a pretty big beast. Even just in the Data Access Block theres a lot to read up on, much more than someone could put in a post here. Theres a few examples on the internet, but most of them seem to use the DAB for one function only: ExecuteDataSet(...) Finding a good guide could be tricky.
If you need to get a data layer up and working in a hurry, I suggest you use Diamond Binding, linked in my signature. That will do 90% of the work for you.
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I linked in your signute and read about Diamond Binding.
It is a tool? It is code block?
So, It's free or I have to pay something?
I am building a data layer but I need to understand how it works.
There are many examples with enterprise library and dataaccess layer but There isn't any with both.
Any advice?
Thanks in advance
JESHU
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Hi JESHU,
In answer to your question, it is an addin for Visual Studio and a runtime library. If you flip though the example on the website, you can see basically what it does.
And yes, depending on what you will use it for, there is a free edition that you can download.
A quick summary of how it works (which is covered in more detail in the examples, and the getting started guide) is that it maintains the active record classes for you, with the database fields as properties - a lot like how the form designer gives you a class with all the controls available in a partial class. Then you can just use them out the box like a normal business layer, Dim foo as Invoice = Invoice.Find(123), or add your own code. So it takes care of the data <--> business objects part of your application for you.
I encourage you to give it a try - it will save you a lot of time 
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Hi,
I have a problem with the memorystream.
I read a file in memorystream .
The length of the file is 178 and the length of the memorystream is 160.
And when I convert the bytes from memorystream in string I see that the file is not complete.
Can I lose bytes or the memorystream doesn't hold all the information?
Please help me because I don't have a clue.
Thanks.
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Standard question #2. What does the code look like that you're using to get the file into the memory stream?
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Dave Kreskowiak wrote: Standard question #2. What does the code look like that you're using to get the file into the memory stream?
No. Standard question #2 is:
What error message do you get?
You want standard question #3:
What does your code look like?
---
single minded; short sighted; long gone;
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Private Function DecryptFile(ByVal strInputFile As String, _<br />
ByVal bytKey() As Byte, _<br />
ByVal bytIV() As Byte) As String<br />
<br />
Dim strBuilder As New StringBuilder<br />
Dim mem As MemoryStream = New MemoryStream()<br />
'Setup file streams to handle input and output.<br />
fsInput = New System.IO.FileStream(strInputFile, FileMode.Open, _FileAccess.Read)<br />
mem.SetLength(0)<br />
'Declare variables for decrypt process.<br />
Dim bytBuffer(4096) As Byte 'holds a block of bytes for processing<br />
Dim lngBytesProcessed As Long = 0 'running count of bytes processed<br />
Dim lngFileLength As Long = fsInput.Length 'the input file's length<br />
Dim intBytesInCurrentBlock As Integer 'current bytes being processed<br />
Dim csCryptoStream As CryptoStream<br />
'Declare your CryptoServiceProvider.<br />
Dim cspRijndael As New System.Security.Cryptography.RijndaelManaged<br />
<br />
csCryptoStream = New CryptoStream(mem, _<br />
cspRijndael.CreateDecryptor(bytKey, bytIV), _<br />
CryptoStreamMode.Write)<br />
<br />
'Use While to loop until all of the file is processed.<br />
While lngBytesProcessed < lngFileLength<br />
'Read file with the input filestream.<br />
intBytesInCurrentBlock = fsInput.Read(bytBuffer, 0, 4096)<br />
'Write output file with the cryptostream.<br />
csCryptoStream.Write(bytBuffer, 0, intBytesInCurrentBlock)<br />
'Update lngBytesProcessed<br />
lngBytesProcessed = lngBytesProcessed + CLng(intBytesInCurrentBlock)<br />
<br />
End While<br />
<br />
Dim result As Byte() = mem.ToArray()<br />
<br />
Dim valu As String = System.Text.Encoding.ASCII.GetString(result)<br />
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You forgot to close the cryptostream so that it gets flushed. The stream is encrypted in blocks of a set size (probably 32 bytes in this case), which means that you only get the completed blocks if you don't close the stream.
---
single minded; short sighted; long gone;
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thanks.
I resolved the problem,now it works.
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