i hav two openfilefialogs(1 and 2). So i also have a listbox. the files opened with the openfiledialogs will be added to the listbox. and when i need to open the files i need to see if they are from which openfiledialog. so
it is like this.
Path.GetDirectoryName(OpenFileDialog1.FileName) & "" & Form3.ListBox1.SelectedItem.ToString
'if this returns a null then go to this
Path.GetDirectoryName(OpenFileDialog2.FileName) & "" & Form3.ListBox1.SelectedItem.ToString
I have some code which gets child items for a menu via the GetChildren function which takes a list of menuData: Dim builtMenu As New List(Of MenuData)(_rawData.FindAll(Function(item) item.GroupingID = 0))
For Each menuData As MenuData In builtMenu If menuData.Children IsNot Nothing Then menuData.Children.AddRange(GetChildren(menuData)) End If Next
If I check if menudata.children isnot nothing, it always is nothing because the GetChildren function is yet to run (providing the child items, which do exist). If I remove this check and just have this code:
Dim builtMenu As New List(Of MenuData)(_rawData.FindAll(Function(item) item.GroupingID = 0))
For Each menuData As MenuData In builtMenu menuData.Children.AddRange(GetChildren(menuData)) Next
Then I am presented with a Object reference not set to an instance of an object error on menuData.Children.AddRange(GetChildren(menuData))
I have a several form elements that I am dynamically creating with javascript when a user changes a number value in a textbox, by filling the innerHTML of a div like so:
Then, in the aspx.vb code behind, when the user clicks the Save button, I run through a series of Requests to try and add the values that are in these form elements to a SQL string:
Dim DFTestValue1 As String DFTestValue1 = Request("textbox" & c.ToString)
where c is a loop counter to the # of textboxes created (the input value mentioned above that triggers the create) The problem here is that this code works in Internet Explorer but not in Firefox or Chrome. The Request() value returns null and nothing is saved. I hope I've explained this well enough.
I have a WPF application that uses a third-party library to perform a specific task; this library, in one of its methods, executes the statement Assembly.GetEntryAssembly(). If I run the WPF application on debug (by running a .Net exe for testing) the library works properly and Assembly.GetEntryAssembly() returns a reference to the assembly of the executable, but in production I have a different situation that causes me some problems.
I have the following code in my application. When it is executed it brings out a null value at times, where i am sure there should be a value returned. I have checked by running the sql statement in the database and it returns the correct value. What could be wrong with my code? [Code]
Rather interesting bit on this one, I have all the code where it should be working but whenever it hits parse1 it returns the file as null. [code] I probably just need a fresh pair of eyes because I'm not seeing where this is glitching (...or if it's just my computer in this case.)Rather annoying at this point, tried break points and following the execution to catch the error but no such luck.
I have some VB.NET code that creates a TransactionScope instance:
LoggingUtility.LogDebug("UpdateCallTable", "SatComCallDataImporter", "About to associate call data with contracts") Using ts = New TransactionScope() LoggingUtility.LogDebug("UpdateCallTable", "SatComCallDataImporter", "Getting all unimported SatCom calls")
My application is throwing an exception on the call to the creation of a new TransactionScope, with "Object reference not set to an instance of an object.". The exception isn't thrown on my development machine or my test machine; only on the customers production machine, and I have no idea why. I've placed debug lines immediately before and after this line so I'm positive it is this line causing the problem.
A have used TransactionScopes throughout the application and this is the only place throwing the exception on the client machine."About to associate call data with contracts" gets written to the log and the next log entry is the "Object reference not set to an instance of an object".
Code works fine if I move it out of a transaction.I've been struggling with this for 4 days now and have got no closer.
Is their a more elegant way to assign a space to a value, if a database call returns null for a data set column? I am doing the following check which is pretty tedious:
If (ds.Tables("employee").Rows(0).Item("txtNamePrefix").IsDBNull(0)) Then txtNamePrefix.Text = "" Else txtNamePrefix.Text = ds.Tables("employee").Rows(0).Item("txtNamePrefix") End If
I have a DataGridView connected to a DataSet. I want to allow the user to update and insert new records on the RowLeave and CellLeave events. The Update method works: Me.ExpensesTableAdapter.Update(Me.DataSet1.Expenses)
I am basically trying to access the CLSID portion of the registry... some CLSIDs are working, some arent...
Here is my code: Dim regkey As RegistryKey regkey = Registry.ClassesRoot.OpenSubKey("CLSID" & location & "InprocServer32", False) 'Just Returns null when im looking for a certain CLSID Dim SubKeyvalues() As String = regkey.GetValueNames() Dim subkeyvalue As String subkeyvalue = regkey.GetValue(SubKeyvalues(0))
I'm trying to get data with the methods below and I get null response and can't figure out why. I'm just trying out a different way of using a wcf service from silverlight and I don't understand something that I should.[code]...
The employee object will stay null. If I put a break into the service call and follow through the code it finds the correct record from the database and the return statement shows an object with the correct data but still the employee object in silverlight side will remain null.
By my logic, this should only assign .length to index IF the length of strItem is longer than 0. This check is there in case the listbox is empty, or the user has not selected an item. However, everytime I go through this code without an item selected I get:
I have a vb.net app that I can read a .xls file into a dataset or loop through as oledbdatareader and it gives the same result.Some of the rows have all nulls when I loop through them but if I open the same file in Microsoft Excel I can see that row fine.[code]From the info above the first two SKU values would come through fine but when I get to the 3rd row it would show a null.Is it possible that it kind of inherits the first rows type and since the 3rd row isn't all numeric if nulls it? [code]
I have a select statement which was returning the required values but when I changed the OS date from English(US) to English(UK), it now returns null. I believe the problem is concerned with date since in the query am selecting values where the date from the database is the same as the date in a combobox but I don't know what else I can do. It almost looks like the dates in the combox and in the database are not the same and yet the date in the combobox is actually retrieved from the database and has been returning values fine until I changed the system date format.Here's my select command:
cmd4.CommandText = _ "SELECT sum(brought_qtty), recieved_qtty from brought_coffee, centre_weigh where brought_date=#" & _ dtComb.Text.Trim & "#" & _[code].......
I have to cut down the amount of code in my blackjack program so im trying to use a function however the function always returns a value of 0 I have tried putting in "return cardvalue" but it still comes out as 0 I dont know where I went wrong or if the code im using can even be used as a function.
Function Values(ByVal deal() As Integer, ByVal counter As Integer, ByVal cardvalue As Integer) As Integer If deal(counter) = 1 Or deal(counter) = 2 Or deal(counter) = 3 Or deal(counter) = 4 Then
I wrote a vb program that would prompt the user to enter a number and then enter the exponent value they wanted the number raised to. When they clicked button 3 it did the calculation. everything worked perfectly.
Now I need to change the program. I must create a function in a module and then call that function from button3 click event. I have tried several different ways and even though it seems to "work", it keeps returning an incorrect value![code]...
I have to create dinamcly a Table ( not a DataTable) and I need to write the Functions in other class... so I need to create a function that Returns a Table to make possible I just atribuite the Table to my <asp:Table> control.
how can write code that can check if __InstanceCreation query has returned rows or not. I'm using this code to check for the creation of a file
Private Function CheckForFileCreation() As Boolean Try Dim query1 As New WqlEventQuery( _
[Code]....
so I need to know if the query returned > 0 rows, if it did then the function will return true, if the query returned 0 rows then the function should return false. Sorry I am a complete noob with WMI and WQL
I need top create a function that gets the next integer in the sequence of 1 to 60. Each time the function is called, I need it to increment from what the last value was and return the next number as the result. It also cannot return the same integer in 2 consecutive calls. When the count gets to 60, the sequence needs to reset back to 1. I would like to function to have no parameters.
I have created a function that does this using the cache to store the last value that was returned, but I am worried that with concurrent calls to the function that it might not work as I expect and 2 calls could get the same integer.
Is cache blocking the correct method to use in this instance or is there something other method I am not thinking about?
Also, stuck using .Net 3.5 and this is a web application.
I just wrote this function based on using SyncLock. Any obvious problems with it that I don't see? I am using the Cache to save the last value that was returned.
Private Shared Function GetNextNumber() As Integer Dim o As Integer Dim r As Integer
I have a function that returns a bitmap meant to be used as background in a panel, and occasionally I'd have to call it to create a new background based on parameters
How can I call individual parts of this function? I would like to call return Gallons and decPaintCostperRoom as individual entities with a single function.
So I have a class called Transactions and I put all my functions there. The problem is, when I try to call that specific function and assign it to a variable, there is a "ByRef Argument Type mismatch" error that keeps on bugging me.
Public Function GetUserID(name As String) As Integer Dim gotID As Integer Dim rec As Recordset Call connectDB sSQL = "select ID from User where Name ='" & name & "'" Set rec = CurrentDb.OpenRecordset(sSQL) [Code] ......
I have just received some documentation for an Interface and a class implementation, and I had a question about the return type defined in the interface. here is the function from my interface (I have abbreviated the parameter list in the SearchAddress function).my concern is the SearchAddress function.
Public Interface IAddress Property AddressID As Long Property AddressTypeID As Long
i am trying to write a function which should return a 2D array , please advise what is wrong with.
vb.net Public Function Cursor(ByVal SQL As String, Optional ByVal PARA1 As String = "", _ Optional ByVal PARA2 As String = "") As String(,) Dim Cols, roWES, I, J As Integer
Im making a login system that encrypts and decrypts the username and password. My encryption code is:
Private Shared Function enc(ByVal targetString As String, ByVal maskvalue As String) As String Dim Index As Integer = 0 Dim ReturnValue As String = ""
[code]....
The enc function works for both encrypting and decrypting (I've tested with a MsgBox alert. The problem I'm having is when the program loads, it reads the file and decrypts it. However, instead of properly working, it returns one character in the first textbox and nothingin the other without any error being thrown.
