Saving Data To A Random File Using A Fixed Array Element Error
Feb 7, 2012
The file structure is fine for retrieving data from the file but when I go to write data to the elements and hit any of the fixed array elements, I get an exception error. this has got to be a sytax problem I am just not seeing.
It seems that I am not addressing the array member correctly yet the same logic pulls it properly from existing records on file.
in a Module I have the structure as follows:
Structure INVOICE
<VBFixedString(6)> Public NUM As String
<VBFixedString(2)> Public SYMBOL As String
[Code]....
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Feb 9, 2010
I am trying to write a program that will use a Structure with <VBFixedString(4), VBFixedArray(10)> Public Test1() As String. Back in vb6 it was in the Type statement as Test1(10) as string *4 When I hit the line ".Test1(X) = TB1" i get the following error:
Object reference not set to an instance of an object.
[Code]...
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Nov 26, 2011
VS2010 (SP1) / .NET 4 on Windows XP. The question is simple, the answer; not so much. When generating a salt, should the LENGTH of the salt be random, fixed or a random number within a (min/max) range? I am using RNGCryptoServiceProvider to generate the salt, just unsure of the length of the salt.
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May 3, 2011
I am working on a sale report program. Its purpose is to record the new item and the amount made from the item mon - fri. My problem isn't getting the total. I am using a For..Next to do this. The problem is that everytime i add a new item it changes all of the previous items weekly totals as well. Thus throwing off my Total Sales. My initial suspicion is that since i don't have it added as part of the output i display it changes and re-adds it to all old items.
The section of code below is the area where i believe my problem is.
The Array itemNames holds 10 elements for the Items sold.
The Array itemSales holds the weekly price data.
' add item to listbox
For counterItem = 0 To itemCount Step 1
[CODE]..........................
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Nov 16, 2009
I have a Fixed Text File and i need to import data from this Text file to my Database I am Using VB2008 and SQL Server2000 This is a sample of my Text File
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Mar 11, 2010
I need to randomly pick an element from an array and I can only use that element three times,I can randomly pick the element but how do I go about only using it three times.
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Feb 12, 2012
Currently I am saving data from my applications by saving a text file via a stream reader as a string. I have come to a problem. In my current application, I have an array of the following structure:
[Code]...
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Aug 25, 2010
I am learning to use TextFieldParser to read a fixed width text data file. It works great. I copied code below. Question: How to stop at the end of each line because I need to add some code?
Using tf As New TextFieldParser(fileName)
tf.TextFieldType = FileIO.FieldType.FixedWidth
tf.SetFieldWidths(60, 30, 20) //three columns
[Code].....
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Feb 11, 2007
I'm wanting to put a random amount of data into an array, or an arrayList or some other collection.
Then say>
Dim myItem As Object 'It might be a string or a number or whatever. In this case
Integer or String probably.
' then say>>
[Code].....
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Nov 15, 2010
Private Sub XMLReader()' Wir benötigen einen XmlReader für das Auslesen der XML-Datei Dim XMLReader As Xml.XmlReader _= New Xml.XmlTextReader("Properties.xml")
[Code]...
i'm trying to save data from an xml in an array depending on which record is read. But everything is saved into one array, i think the valuecount +1 doesn't work but i can't get it
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Sep 25, 2009
I have no idea how to save data from an array so it can be reused, also I have to search in 5 textoxes and arrays to get the data I need.
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Aug 24, 2009
I'm trying to save binary data ( convert from image) to byte array in mifare card with acr 120 reader.
image : 687 byte
mifare : 1 k
My problem its can't save but I am trying to save char data its work.
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May 2, 2011
I'm working on a program that when you click a button called new it pops up a new form asking for you to enter a directory location. If the directory exists it saves it into this file:
"C:WindowsSettingsButtonVariableSaves.ini"
I already have working code that saves each directory entered into the ini file on its own line.
Now in this code I'm trying to call each variable back from the ini file when form1_loads and set it to an array called ary() so later I can set the first 10 saved within the array.
So later:
button1.text = ary(1)
button2.text = ary(2)
and so on to
button10.text = ary(10)
and the reason I set the array to record all lines even if theres more than 10 because I want to be able to add more buttons later on.
Here's my current code for saving lines to an array:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim FILE_NAME As String = "C:WindowsSettingsButtonVariableSaves.ini"
[Code]....
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Aug 24, 2010
i want to save and load an array as and xml file. what is the easiers way to do so.
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Jun 9, 2009
I'm working on a project with a large multidimensional array
resrv(200,12,31,33) it keeps track of information on specific dates within a 200 year range.
What I'm looking to do is save the array to a file so that I can load it again when the program is started.
In VB 6 I used to be able to use a simple for next loop into an open file and load it the same way. It doesn't seem to work the same way with Fthe filestream class in VB.net
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Oct 13, 2009
how to save an array of structure to binary file. I tried the binary formatter but it still aint workin. My code attached
Dim directoryList As String()
Dim fileData() As myData
Dim myFile As myProps
[Code].....
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Sep 11, 2009
How to save a 2-dimensional array to Excel file. The result would be two columns in one Excel sheet.
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Feb 10, 2012
Error "there is no row at position 1" when saving data from datatable to database. I have two relational tables like "tbleInvoice" and "tblInoiceDetail" .
tblInvoice is a Parent table and tblInvoiceDetail
is a child table where InvoiceID is a primary key of tblInvoice & foreign key of tblInvoiceDetail in the database.The problem is that when i click the save button the data will be saved into database but also showing Error "there is no row at position 1".my coding structure is an under
Try
Dim com As new OleDBConnection
com.Connection= DBConn[code].....
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Jul 9, 2011
I am getting an error of "There is no row at position 0." while saving the data to SQL CE, my code is as follows: -
Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveButton.Click
Dim SQLDCC As String = "SELECT * FROM DCCData"
[Code]....
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Apr 19, 2010
I have a class file which contains a structure like this.
<StructLayout(LayoutKind.Explicit)> _
Public Structure SampleStructure
<FieldOffset(0)> Public field1 As Int16
[Code]......
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Jul 16, 2010
i need to save an array of intptrs as a part of a structure in a file, vb.net gives me "File I/O of a structure with field 'pList' of type 'IntPtr' is not valid." error, ok i figured and tried to convert them to integers and while it worked for other singular intptrs it did not for the array as it just throws me a conversion error. I then tried rebuilding the array in the new sub of the save structure and while that sorta worked(i think) it then gives a "bad size" error when saving. Im out of ideas, saving the array elements one by one would be suicide as the amount varies and is well in hundreds,
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Nov 23, 2010
Assume I have an array myArray1 = { A, B, C, D, E, F, ., T}I have another that contains a subset of the elements of myArray1 but where the order may vary
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Jan 16, 2010
I have a device with upon serial communication , it send the data as HEX values , (eg, C020042ABD0F91A103E400F929EBC) . I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)
[code]....
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Mar 4, 2010
I am working on a program where some application config info is stored in a Userconfig.xml file. I am loading the file as an XMLDataProvider in the XAML via relative URI:
<XmlDataProvider x:Name="UserConfigDataSource" x:Key="UserConfigDataSource" Source="UserConfig.xml" d:IsDataSource="True"/>
I have a number of items throughout bound to elements in the document and an event handler that saves to the XMLDataProvider:
Private Sub SaveConfig(ByVal sender as Object, ByVal e as System.EventArgs)
'TODO: Add event handler implementation here
Dim SavePath As String = UserConfigDataSource.Source.LocalPath.ToString
[Code]....
When this executes I get the error "This operation is not supported for a relative URI". Is there a good way to produce an absolute URI (aside from getting the assembly executing location and trimming the executable filename from the end)? I expected this to be a somewhat simple procedure.
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Jan 7, 2012
I have a structure which includes this...
Structure MasterStruct
<VBFixedArray(98)>
End Structure
When I create the code to initialize the Sections array like this...
Dim MasterX as MasterStruct
Dim Temp as Integer
For Temp = 0 To 98
MasterX.Sections(Temp) = 0
Next
VS 2008 tells me that MasterX.Sections "is not an array or method, and cannot have an argument list."
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May 11, 2012
[code]Is there any other solution by which we can initialise the array members using new?
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Mar 3, 2011
What i am doing is inserting the first element in array3 into the first index of array4
then im checking second index of array3 and if this is the same as the 1st array then dont insert into array4 as this will be a duplicate.[code]...
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Feb 15, 2012
orking with vb 2010 and ms access as data base, just newbie.im trying to save the loged out date and time to my access table by selecting from tblloghist wherein my column SystemUserID is equal to my textbox SysID(located at my form) then it will save the timelogedout by getting the value of lbltime from my form. the problem is the data type property of my column SystemUserId is in autonumber so i got error saying "Data type mismatch in criteria expression"
Dim con As New OleDbConnection
con.ConnectionString = "Provider=microsoft.jet.oledb.4.0; data source =..systemsdb.mdb"
Dim ds As New DataSet
[code].....
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Mar 30, 2012
I'm I created a SQL Compact database for a program I'm working on and built the tables and forms. I'm trying to add the values entered into the textbox in to my SQL DB, but I keep getting the following Error Message.
"SqlException was unhandled:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)" Below is my code....Its erroing at the cnx.open()
Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
Dim cnx = New SqlConnection(My.Settings.TestDBConnectionString)
Dim sQuery = "INSERT INTO tblMain (Date) VALUES (@Date)"[code]......
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Mar 9, 2009
rewriting a class I use for saving Treeview data to a XML file for use of saving ListView data I can't really figure out the rewrite, I'm stucked, unfortunately Listviews seems to be a big problem for me in general.
Option Strict On
''' <summary>
''' The TreeViewDataAccess class allows the nodes within a TreeView to be
''' persisted to xml for later retrevial.
''' </summary>
[Code]....
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