I have an 2-d arraylist with 2 fixed columns and dynamic rows. The arraylist will be assigned to the session variable at the end of the code below. My question is how can loop thorugh the arraylist from the session to get its value?
If .SQLDS.Tables(.sSQLDSTbl).Rows.Count > 0 Then
Dim NoOfAdjType(1, .SQLDS.Tables(.sSQLDSTbl).Rows.Count - 1)
For iRow As Integer = 0 To .SQLDS.Tables(.sSQLDSTbl).Rows.Count - 1
If Not .SQLDS.Tables(.sSQLDSTbl).Rows(iRow).Item("i_commAmt") Is System.DBNull.Value Then
NoOfAdjType(0, iRow) = .SQLDS.Tables(.sSQLDSTbl).Rows(iRow).Item("productType")
NoOfAdjType(1, iRow) = Format(.SQLDS.Tables(.sSQLDSTbl).Rows(iRow).Item("i_commAmt"), "#,##0.00")
End If
Next
Session("iNoOfAdjAmtType") = NoOfAdjType
End If
I have tried this but it's giving me error 'Too many arguments to 'Public Overridable Default Property Item(index As Integer) As Object'
Dim NoOfAdjType As ArrayList = CType(Session("iNoOfAdjAmtType"), ArrayList)
For i As Integer = 0 To NoOfAdjType.Count
Dim a As String = NoOfAdjType(0, i)
Dim b As String = NoOfAdjType(1, i)
Next
The type you are dealing with is Object(,). So when reading from the session you can cast it back to this type.
Here's an article on MSDN which illustrates how to read values from session:
Dim NoOfAdjType as Object(,) = CType(Session("iNoOfAdjAmtType"), Object(,))
' do something with the list
And if you wanted to perform the check safely ensuring that there is an item with the given id in the session:
If Session.Item("iNoOfAdjAmtType") IsNot Nothing Then
' We have a value in the session with the given id
Dim NoOfAdjType as Object(,) = CType(Session("iNoOfAdjAmtType"), Object(,))
End If
I am not certain what is the data-type of array, but this how you manipulate the multi-dimension arrays in VB.NET assuming data-type as object
' declaring variable of multi-dim array
Dim NoOfAdjType As Object(,)
' create array object of needed dimension (you may use redim keyword)
NoOfAdjType = new Object(1, .SQLDS.Tables(.sSQLDSTbl).Rows.Count - 1) {}
...
' push it in session
Session("iNoOfAdjAmtType") = NoOfAdjType
...
' get back from session
NoOfAdjType = DirectCast(Session("iNoOfAdjAmtType"), Object(,))
...
For i As Integer = 0 To NoOfAdjType.GetLength(0)
For j As Integer = 0 To NoOfAdjType.GetLength(1)
Dim a As Object = NoOfAdjType(i, j);
...
Next
Next
See this MSDN article for array in VB.NET: http://msdn.microsoft.com/en-us/library/wak0wfyt.aspx
Try this,
Dim a As String = NoOfAdjType(0)(0,0)
Or use
For Each arr As Object(,) In NoOfAdjType
Next
Related
I have a recursive function that creates a list of items based on their hierarchy(integer is used to determine which level 1 to 10 max). There can be x number of items in any given level. I want to store all the items that belong the same level at the corresponding index of the jagged array. The items aren't retrieved based on their level so the level can be jumping around all of over the place as the function recurses.
Function RecurseParts(lngPartID1, lngLevel) As Object
'this function will recursivley print the parts lists for the part ID passed in
If IsNumeric(lngPartID1 & "") Then
Dim objRSTemp As Object = Server.CreateObject("ADODB.Recordset")
objRSTemp.CursorLocation = adUseClient
objRSTemp.Open(PART_LIST_SQL & lngPartID1, objConn, adOpenForwardOnly, adLockReadOnly)
'objRSTemp.ActiveConnection = Nothing
If objRSTemp.eof And objRSTemp.bof Then
'PROBLEM, WE HAVE NO RECORDS
Response.Write("There Were No Parts For This Assembly (Part ID #:" & lngPartID1 & ")")
Else
'make output
Dim strTemp As String = String.Empty
If lngLevel <> 1 Then strTemp = " style=""display: none;"">"
Response.Write("<table id='tblparts" & lngCurrentLineNum & "' border=""0"" cellspacing=""0"" width=""100%"" cellpadding=""1"" " & strTemp)
Do Until objRSTemp.EOF
'increase the current line num
lngCurrentLineNum = lngCurrentLineNum + 1
'get current Part ID
lngCurrentPartID = objRSTemp("PartID").value
'reset flag
blnIsAssm = False
'loop thru array of assemblies to see if this is a parent
For ctr = 0 To UBound(arrAssmList, 2)
If arrAssmList(0, ctr) = lngCurrentPartID Then
'the current part is an assembly
blnIsAssm = True
Exit For
ElseIf arrAssmList(0, ctr) > lngCurrentPartID Then
Exit For
End If
Next
If blnIsAssm Then
'recurse these parts
If RecurseParts(objRSTemp("PartID").value, lngLevel + 1) = True Then
'awesome
End If
End If
objRSTemp.MoveNext()
Loop
Response.Write("</table>")
End If
If objRSTemp.State Then objRSTemp.Close()
objRSTemp = Nothing
'RETURN FUNCTION
RecurseParts = True
Else
'no PART ID passed in
Response.Write("No Part ID Passed In")
RecurseParts = False
End If
End Function
It sounds like a Dictionary would work here.
Dim myDict As New Dictionary(Of Integer, List(Of String))
In your recursive function. The parts in the {} are the parts you have to supply.
'this builds the keys as you go
If Not myDict.ContainsKey({{key} -> your Integer}) Then
'add key and use the From statement to add a value if know at this time
myDict.Add({key}, New List(Of String) From {value})
Else
myDict({key}).Add({string to insert at this level})
End If
List of keys in reverse order:
Dim keys = myDict.Keys.OrderByDescending(Function(k) k)
I was able to create a List to store all the partIDs and their levels.
Dim arrSubID As New List(Of List(Of Integer))()
Function RecurseParts(paramenters)
For ctr = 0 To UBound(arrAssmList, 2)
If arrAssmList(0, ctr) = lngCurrentPartID Then
'checks whether we need a new index in the list
If lngLevel + 1 > arrSubID.Count Then
arrSubID.Add(New List(Of Integer))
End If
'adds the partID where it belongs!
arrSubID(lngLevel).Add(lngCurrentPartID)
blnIsAssm = True
Exit For
ElseIf arrAssmList(0, ctr) > lngCurrentPartID Then
Exit For
End If
Next
End Function
I have a datatable that returns a column name location which is a combination of city,state and zipcode,i have stored that column values in an array. now i want to split the array data and store in another array.
here is the code but it is not working.
Dim eTemp As DataTable = dt.DefaultView.ToTable(True, "Location")
Dim s() As String
Dim Count As Integer = PortCodeTemp.Rows.Count - 1
ReDim s(0 To Count)
For i = 0 To Count
s(i) = PortCodeTemp.Rows(i).Item("Location")
For t As Integer = 0 To Count
Dim items As String() = s.Split(",".ToCharArray())
Next
Next
Your issue is here
Dim items As String() = s.Split(",".ToCharArray())
because there is no Split method for an array.
I think you meant to split the string at index i, which is where you stored the string value of location.
Dim items As String() = s(i).Split(",".ToCharArray())
Update
I'm not sure why you're doing it this way but here is something you can try. Instead of using an array I just used a List(Of String) so there's no need to be doing a redim in every loop.
Dim allItems As New List(Of String)
For i = 0 To PortCodeTemp.Rows.Count - 1
Dim location as String = PortCodeTemp.Rows(i).Item("Location")
allItems.AddRange(location.Split(",".ToCharArray()))
Next
Therefore, allItems should contain everything.
I want to make a class library containing classes for common tasks.
I made such a class that worked very well on some forms but it have some errors that I can't trace down.
This is my code and it does the following:
It accepts 3 parameters: form name, datagridview name and the textbox name prefixes.
It counts the datagrid columns
It takes the current row index
It makes the array with a length corresponding to the number of columns
It's looking in the form for all text boxes that have a name with prefix parameter + column name and set the value in it
Code:
Sub setRecordFieldToControl(ByVal root As Form, ByVal dgv As DataGridView, ByVal cntrlPreNam1 As String, ByVal cntrlPreNam2 As String)
Dim j, k, z As Integer
Dim s As String
z = dgv.ColumnCount
k = dgv.CurrentRow.Index
j = 0
Dim headTxt(z) As String
For indx = 0 To z - 1
headTxt(indx) = dgv.Columns(indx).HeaderText
Next
For Each i As Control In root.Controls
If TypeOf i Is MaskedTextBox Or TypeOf i Is ComboBox Then
For clm = 0 To z
If i.Name = cntrlPreNam1 & headTxt(clm) Or i.Name = cntrlPreNam1 & headTxt(clm) Then
s = (dgv.Rows(k).Cells(j).Value)
i.Text = s
' i.Text = dgv.Item(j, k).Value
j = j + 1
If j >= z Then
Exit For
End If
End If
Next
End If
Next
End Sub
My problem is: on some forms I got this error:
Index is out of range for line i.Text = s
The error does not show up when I put something else in my text box, the error only appears when I put the s in it.
The error is probably in the line
For clm = 0 To z
It should read
For clm = 0 To z - 1
The column indexes range from 0 .. number_of_columns - 1.
UPDATE
There are several problems with your code:
The logic seems wrong to me. You are looking for the column (clm) with the right name but then take the value of another column (j). Why?
The variable names are not speaking and are even misleading (e.g. i for a Control).
You have nested loops with an O(n^2) behavior. See Big O Notation.
I suggest rewriting it. Use a dictionary for the possible control names, that stores the corresponding column indexes by name. Dictionaries have a nearly constant access speed. In other words: Lookups are very fast.
Sub SetRecordFieldToControl(ByVal root As Form, ByVal dgv As DataGridView, _
ByVal cntrlPrefix1 As String, ByVal cntrlPrefix2 As String)
Dim currentRowIndex As Integer = dgv.CurrentRow.Index
Dim columnDict = New Dictionary(Of String, Integer)
For i As Integer = 0 To dgv.ColumnCount - 1
Dim headerText As String = dgv.Columns(i).HeaderText
columnDict.Add(cntrlPrefix1 & headerText, i)
columnDict.Add(cntrlPrefix2 & headerText, i)
Next
For Each cntrl As Control In root.Controls
If TypeOf cntrl Is MaskedTextBox Or TypeOf cntrl Is ComboBox Then
Dim columnIndex As Integer
If columnDict.TryGetValue(cntrl.Name, columnIndex) Then
Dim value As Object
value = dgv.Rows(currentRowIndex).Cells(columnIndex).Value
If Not value Is Nothing Then
cntrl.Text = value.ToString()
End If
End If
End If
Next
End Sub
I have a problem.
Dim Maxis As String
'Dim MaxisExtra As String
Dim b As New ArrayList
Dim WS As New WebService1.Service1
Dim cnt As String
Dim MRWS As New MobileReload_WS.MobileReload_WS
cnt = WS.StockCountTelco(1, Session("Maxis"))
If CInt(cnt) >= CInt(DropDownList1.SelectedItem.Text) Then
Dim sLock As String
sLock = MRWS.LockAStock(1, 1, "Online", Session("Maxis"), DropDownList1.SelectedItem.Text)
Session("sLock") = sLock
If sLock = "" Then
PopupMsgBox("Unable to allocate Stock")
Else
Maxis = "Maxis" & ";" & Session("Maxis") & ";" & DropDownList1.SelectedItem.Text & ";" & Session("Cost")
'If MaxisExtra = "" Then
' b.Add(Maxis)
' Elseif
' MaxisExtra = MaxisExtra + Maxis
' b.Add(MaxisExtra)
'End If
End If
Else
PopupMsgBox("Not enough stock")
End If
b.Add(Maxis)
Session("Transaction") = b
End Sub
The first time i enter the string into the arraylist it is okay. But when the user press the button add again the second time, it replace the first string. Can anyone help me how to save the string into the second slot based on my coding?
If you're talking about the b ArrayList, then you're creating a new one each time and storing the new ArrayList in Session("Transaction")
Maybe you mean something like this instead...
Dim b as ArrayList = Session("Transaction")
If b Is Nothing Then
b = new ArrayList
End If
...
Session("Transaction") = b
Although it's difficult to say exactly, because your code is very messy and not clear
You put the array list in a session variable, but you never read it back. You create a new array list each time, so it will always be empty and replace the previous one.
Get the array list from the session variable if there is one:
Dim b As ArrayList = Session("Transaction")
If b Is Nothing Then b = New ArrayList
i'm using vb.net i have the following object array that i'm trung to extract all the true value from give it a name and add it to an array
here is the object array
this is what i have tried so far :
Dim myarray() As String
Dim number As Integer = 0
If resultArray(0).BolComment Then
myarray(number) = "comment"
number = number + 1
End If
If resultArray(0).BolComplete Then
myarray(number) = "complete"
number = number + 1
End If
If resultArray(0).BolFinished Then
myarray(number) = "Finished"
number = number + 1
End If
If resultArray(0).BolOutCome Then
myarray(number) = "OutCome"
number = number + 1
End If
If resultArray(0).BolStatred Then
myarray(number) = "Started"
number = number + 1
End If
If resultArray(0).BolUser Then
myarray(number) = "User"
number = number + 1
End If
this is giving me an error : the variable has been used before
Question how can i extract all the items that have the true value and push it to a new array with giving it a new name
Thanks
I think your problem is that you are not initializing the array to a specific size, nor are you re-sizing it each time you add a new item. However, it would be better to just use the List(T) class:
Dim list As New List(Of String)()
If resultArray(x).BolComment Then
list.Add("comment")
End If
If resultArray(0).BolComplete Then
list.Add("complete")
End If
If resultArray(0).BolFinished Then
list.Add("Finished")
End If
If resultArray(0).BolOutCome Then
list.Add("OutCome")
End If
If resultArray(0).BolStatred Then
list.Add("Started")
End If
If resultArray(0).BolUser Then
list.Add("User")
End If
Then, if you need it as an actual array, do this:
Dim myarray() As String = list.ToArray()