.net - Insert A 2D Array Object To Database?
Oct 7, 2011
My Task Background :I have list of data items and have to calculate/aggregate details about each data item and populate that to SQLServer database.I can do 1 by 1 insert [Traditional method]But, the application needs to perform good.Is it possible to aggregate the data in a 2d array and dump into database @ once ?' Populate this and insert it to database.
Private data(100, 100) As Object
So, how to do that ?Also, is it possible to use dataset in some way ?
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Oct 16, 2011
I am trying to insert a date object in visual basic into an sql database. And I am getting this error
SqlDateTime overflow. Must be between 1/1/1753 12:00:00 AM and 12/31/9999 11:59:59 PM.
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Jun 9, 2011
I have some BLOB images within a small, 9 row, database and I simply want to run through the database and sequentially place each separate image into 9 picture boxes. I have tried with a picturebox array but it's placing the same image into each picturebox!
[code]...
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Feb 3, 2010
I am new in this forum, also new in VB.Net I need to create a public class for insert and delete data to database Public Class My_DBFunctions
[Code]...
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Aug 6, 2010
Here is the structure that I have:
Friend Class StandardFormatFile
Friend fileType As String
Friend numberOfSeries As Integer
[code].....
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Dec 18, 2010
could someone tell me what i am doing wrong in this codeProtected Sub insert_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Insert.Click
[Code]...
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Mar 3, 2009
Visual Studio 2008VB.NETFramework 3.5Windows Application
I have a SQL database names TestSQLVB
In it a table called tblTest2, with a three fieldstest2id , int, pk, increment by 1field1, varchar(50)field2, varchar(50)
I have a dataset named Dataset2.xsd
A tableadapter named tblTest2TableAdapter
A insert query names InsertTest2 with fields @f1, @f2 and ExecuteMode = Scalar
When I run the following code per MSDN [URL] the database does not get updated.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim testds As New DataSet2TableAdapters.tbltest2TableAdaptertestds.InsertTest2("One", "Dog")
End Sub
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Jun 22, 2010
im in the middle of doing sql queries i can search my data base usingGetDateFrom (Select, from, where) Me.nameTableAdapter.FillBy(namenDataSet.descip, Me.box1TextBox.Text,Me.box1TextBox.Text, Me.box2TextBox.Text, Me.box2TextBox.Text)i have this working fine im struggling with inderting data to my databse i have made the query ..
INSERT INTO `details` (`Forename`, `Surname`, `Username`, `Password`)
VALUES (''& ForenameTextBox.Text &'', ''& SunameTextBox.Text &'', ''& UsernameTextBox &'', ''& PasswordTextBox &'')
[code]....
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Jun 14, 2011
I didn't think it fair to post a comment on Fredrik Mörk's answer in this 2 year old post, so I thought I'd just ask it as a new question instead..NB: This is not a critiscm of the answer in any way, I'm simply trying to understand this all before delving into memory management / the marshal class.
In that answer, the function GetByteArray allocates memory to each object within the given array, within a loop.Would the GetByteArray function on the aforementioned post have benefited at all from allocating memory for the total size of the provided array:
Dim arrayBufferPtr = Marshal.AllocHGlobal(Marshal.SizeOf(<arrayElement>) * <array>.Count)
I just wonder if allocating the memory, as shown in the answer, causes any kind of fragmentation? Assuming there may be fragmentation, would there be much of an impact to be concerned with? Would allocating the memory in the way I've shown force you to call IntPtr.ToInt## to obtain pointer offsets from the overall allocation pointer, and therefore force you to check the underlying architecture to ensure the correct method is used*1 or is there a better way? (ToInt32/ToInt64 depending on x86/64?)
*1 I read elsewhere that calling the wrong IntPtr.ToInt## will cause overflow exceptions. What I mean by that statement is would I use:
Dim anOffsetPtr As New IntPtr(arrayBufferPtr.ToInt## + (loopIndex * <arrayElementSize>))
I've read through a few articles on the VB.Net Marshal class and memory allocation; listed below, but if you know fo any other good articles I'm all ears![URL]..
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Mar 4, 2012
I am creating a dll with all the functions and subroutines that I use all the time and I decided to create a function that I can pass different types of array to so the function obviously (or not) would have an array of type object. Now I no you can pass any type into an object type but when I pass an integer array into an object array I get an error.
value of type '1-dimensional array of integer' cannot be converted to '1-dimensional array of object' because 'integer' is not a reference type.
Shared Function CompareArray(ByVal FirstArray() As Object, ByVal SecondArray() As Object, Optional ByRef ErrorMessage As String = "") As Boolean
Dim IntArrayOne() As Integer = {1,2,3,4,5} Dim IntArrayTwo() As Integer = {1,2,3,5,6} Dim IsSame As Boolean = False IsSame = CompareArray(IntArrayOne(), IntArrayTwo())
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Mar 29, 2010
I am having some trouble creating an object array of different object types. Here is what I have so far:
Public Sub New()
Dim b1 As New Book("Book Title 1", "Gold Book Publisher", 1.0, "Bob Jones", "192DJDJD212", "01/02/10")
Dim b2 As New Book("Book Title 2", "Gold Book Publisher", 1.0, "Bob Jones", "192DJDJD212", "01/02/10")
Dim b3 As New Book("Book Title 3", "Gold Book Publisher", 1.0, "Bob Jones", "192DJDJD212", "01/02/10")
[code]....
If I define the array As Book (Public publicationArray(6) As Book) or Magazine (Public publicationArray(6) As Magazine) I am able to access the properties of that class but not both. I think I need to define a type for each array instance but not sure how to do this.
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Mar 4, 2009
I have an interface that describes an specialized list in my application...
[Code]....
Is there a way to make an interface serializable, or am I going to have to convert each of my objects into a concrete class implementing the interface, and then return that class?
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Jan 30, 2011
what's the difference between variable array and object array?
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Oct 15, 2011
why my insert doesn't insert into mysql database
[Code]...
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Feb 20, 2011
here is my code so far:
Public Sub cmdSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSave.Click
Dim i As Integer
[Code].....
when i click the button, i get a error message saying "Syntax error in INSERT INTO statement". as far as i can tell, i have everything i need to insert a new row into the database, and i dont see why this problem is occuring.
item(0) is an autonumber key field, so that should make a new record by itself, and i have declared the input textboxes as the data() array
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May 3, 2011
I was create Access database with Access 2003. I create VB project with Visual Studio 2005 Standard With connection wizzard I create coonect with this Access database, select all tablesI see this database inside Data sources and inside Server explorer Test connection is OK When I drag and drop table from Data sources, Wizzard don't create DataGridView, DataSourceBinding etc .. and I see popup window with mesage: Object reference not set to an instance of an object and then "game over"
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May 9, 2012
I have script like this :
Private Sub cmd_save_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmd_save.Click
If txt_kdbrg.Text <> "" Then
[Code]....
give me alternative script, if object is duplicate script give alert or message "already exist"
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Jan 14, 2011
what is wrong with my code it is supposed to output all tables in my sql database but it is giving me an error saying object reff not set to instance of object
ListBox1.Items.Add(CType(GetTables().ToString, String
Public Shared Function GetTables() As String()
Dim kon As SqlConnection[code].....
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Jun 6, 2010
I created a dataset and i am using OleDbDataAdapter to insert new values to access database. But when i close the program and after open it, values are not in the database. How can i solve this problem? Also, i have another problem. When i write codes that
[Code]...
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Jan 2, 2010
I'm using a OleDB connection to a access database. I'm entering a row into the database to set some user preferences. What i need to get is get back the row ID of the row I just entered. I'm more familiar with PHP and with PHP I use use this entry
[Code]...
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Jul 21, 2009
How can this statement give this error "Object reference not set to an instance" what is this means for0.?[code]...
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Nov 14, 2009
i was coding vb6 since 4 years.and few month ago i decided to learn Vb.net and i'am working with VS08I'm would use this Socket class HereBy jmcilhinneyBut i need to replace ComboBox by a ListView and i don't really know how to do that because the both don't work
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Feb 22, 2010
The last line in the code below throws the error. Is it because I haven't intialized the size of the byte array?
Public Class Form1
Private toSocket_IPP As Byte()
Public Sub New()
[code].....
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Aug 30, 2010
I am working on a project and came to a junction. I have various data in a object array, myObj().
How can one convert Object Array to Byte Array
I dont know if i should be using Memory Stream, Buffer, etc.
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Mar 2, 2011
Can I insert ComboBox Object to ListView or Listbox using the standard control?
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Nov 11, 2009
how to insert data in XML using ado.net command object?
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Jan 11, 2011
This is my code in vb.net 2010:
Structure feature_s
Public feature() As Integer
End Structure
[CODE]............
I keep on getting a error "object not set to an instance of an object" i am puzzled by this since there are no errors until i run the program. I redim the array. the build is fine. the exception is handled. and the structures and "dims are all global"
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Jun 22, 2009
- In my database, there's 2 table....Log, Application
- I am trying to construct a sentence for my log, something like..
(E.g.: Apply Annual Leave from Monday to Friday)
- Words in bold are to be retrieved from the Application table (database)
Here's my vb code (I am not sure whether I should be using array or not and I am not so sure how to use it too).
Private Sub btnCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCancel.Click
con.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0; data source= H:\Project\user.mdb"
con.Open()
sql = "SELECT * From Log"
[Code] .....
But when I view my Log..something like this appear
- How do I let the array know that the statement is an sql statement, not text??
- or Is there any other way to do it?
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Nov 7, 2009
I am writing a program with VB.NET, there I have to select data from one table. Then I have to update about 4 tables and insert to 2 Tables. Which approach will be ok for me? I'm thinking to use DataSet.
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Nov 9, 2011
I am having problems with my code, where I get the "Object cannot be cast from DBNull to other types" message when Insert(). I get the message on every Insert to this table, even though the data is successfully inserted. If I Update the same data after Insert(), it does so without error. I have checked my values and none of them are DBNull. Even when the same values are passed on Insert that are passed on Update.
My code is :
Private Sub Save()
Dim bo As tbl_GL
bo = New tbl_GL()
bo.ConnectionString = AppConfig.ConnectString
[Code] .....
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