VB 10 Derivative Calculating - Combine These Codes Into One?
Apr 1, 2011
im currently working on a program to have a program produce a derivative of a function. [code]....
This is the code that I have. The function I am trying to get the derivative for is g(x) = -2x^3 + 3(a+b)x^2 -6abx + 10. In my program a and b will be given by the user and than the derivative will be computed. I am not quite sure if I have done this correctly. Also, I would like the program to output the Maximum and Minimum of the function g(x) on the interval (0,1). I know I will need to use a function for each max and min.The way I have done this is: [code].....
where x and y are the critical points of g(x).Have I done this correctly? I am also a little stuck on how to combine these codes into one so that with the push of a button the derivative is done and a max and min produced.
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Apr 24, 2012
Am really crying for getting nothing of my program.This code below stores something which not quite sure if its storing image in database becuase when i go to database, all what i see is null for the column of image while i see other informations such as fname.
[Code]...
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Aug 17, 2011
I need my calculations to stop performing when an error is received[code]..
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Dec 25, 2009
Dear Experts modify UPDATE codes according to INSERT codes Style.
[Code].....
I need update codes as there are insert codes
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Apr 22, 2010
VB.NET 2008 .NET 3.5 I have two base classes that are MustInherit (partial). Let's call one class OrderBase and the other OrderItemBase. specific type of order and order item would inherit from these classes. Let's call these WebOrder (inherits from OrderBase) and WebOrderItem (inherits from OrderItemBase).
Now, in the grand scheme of things WebOrder is a composite class containing a WebOrderItem, like so:
[Code]...
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Apr 27, 2010
How do I combine a last name to a first name to create a list of names in a table from a form? I have tried to use the technique of creating a 5 uppercase letter record identifier, but I can't get the name to allow for different length names without truncating.
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May 29, 2009
I have a friend who is very good at c#, but i am using vb.net and not clearly experinced with c#. i want work with my friend together.how can we do ?
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Apr 8, 2012
I was wondering if there is a way to include / 'run' C++ code within VB.net I think I read somewhere about turning the C++ Code into a library and can access it that way, but not 100% sure if I did in fact read that right or if I'm dreaming things up. Basically, I want to design a basic UI, ie just a button or 2, and when the button is clicked I'd like it to use the C++ Code.
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Mar 12, 2011
how can i get cell text value from excell sheet in visual basic and then after changing its text send it to back excell. when i open excel file i should get the changed value in file.
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Jun 8, 2011
I am trying to UNION the two queries below without success.
Dim
ds1
As
New
DataSet
Dim
MyConnection1 As
New
OleDb.OleDbConnection(GetPOWERConnectionString())
[Code] .....
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Oct 31, 2011
how to combine this 2 statment..
IsConnected("Select * from manager_table", False)
Call Loader()
IsConnected("Select * from Clerk_table", False)
Call Loader()
i hve 2 listview, 2 table from accessdatabase..i put listview in tabcontrol..1 in tab 1 & second in tab 2...
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Nov 22, 2011
I'v got 3 functions that I'd like to combine into 1. There is only one line in each function that changes. can think of a few ways off the top of my head, but not sure which is "the best", or "proper way" to accomplish this.
Private Function CheckQuads(ByVal QuadNumber As Integer) As Boolean
Dim intArray(3) As Integer
Dim x As Integer = 0
[code].....
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Apr 7, 2011
I need to combine an if/then/else with a try/catch and I can't seem to make it work. Basically I need this:
Try
code that might bomb
Catch ex As Exception
[code]....
I thought I could check Err.Number once I was out of the Try/Catch block but that doesn't work because apparently Err.Number exists within the Catch block after an exception is caught, but outside of the Catch block Err.Number is zero again. How can I do what im trying to do? Im about to NOT use try/catch and resort to On Error Resume Next (aaahhhh the days when things were simple and just worked)
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Mar 2, 2012
I have a solution, Winforms, mainly composed from VB.NET projects (Wiforms, Constrols and business classes).
How, I added to it a WPF project, but wrote it in C#. Actually, every time I make a modification in the WPF C# project, I need to (re)build the C#WPF project. Is there a option to make it work like other (VB.NET) projects (accept and "see" the changes without rebuilding the C# project)?
An example:When I reference project "R.VB" in project "M.VB", I add a method "DoTest" in the "R.VB" and use that method in "M.VB" without compile errors.
If I add "DoTest" in the C# WPF Control and try to use it in "M.VB" project, I recieve a compile error "DoTest" is not a member od "R.C#Class".
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Jul 9, 2010
I have two projects, one written with vb.net and one with c#,I would like to use the vb.net one more as a Class and make the c# project the 'main' one.I have already read that In order to do that I need to compile the vb.net project as a dll and import that dll into the C# project.I am having hard times making it work.Does anyone know how do I import the dll and use the functions that are implemented in the dll?
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Feb 9, 2011
I don't know how to get shift modifier key as when I pressed shift and another key, it show message box "Modifier shift key"
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Jun 8, 2011
how to combine this 2 statment.. [code] i hve 2 listview, 2 table from accessdatabase..i put listview in tabcontrol..1 in tab 1 & second in tab 2...
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Jun 7, 2009
I am wondering how to combine files (exe, dll, jpg etc.) into a single standalone executable. Can this be done?And when i open it, it will automatically launch the included files. However The joined files should be fully encrypted
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Oct 27, 2009
How do I combine richtextboxes? Currently, I am directly saving rich text to a RTB with ".rtf" and I would like to append the rich text information to that box from another RTB. Something like: RTB.rtf &= newrichbox.rtf do not throw any flags but also does not work. What I am ultimately trying to do is save multiple richtextboxes to a single RTF file. I was trying to do it by combining them all into one RTB and using ".savefile()" or is there a better way? Maybe appending them to the file one RTB at a time?
What I'm doing is generating a report, so I have built generic rich text templates that go into multiple RTBs that will create the form sections and I have left placeholders for the data I am adding, so I do replaces on the placeholders to insert the data. However, there are a couple dozen different possible formats for the report based on user options, so I built each section into its own RTB so I can just write out the relevant sections when it comes time to generate the file.
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Oct 8, 2010
I'm trying to combine two datasets, each with 1 datatable and each having the same schemas. Datatable 1 would have a list of records. Datatable two may, or may no, have some or all of the records from table 1 plus more records. I would like to remove all the records from table 2 that are present in table 1.
This is what I got so far:
For Each table1 As DataTable In ds.Tables
For Each row1 As DataRow In ds.Tables(0).Rows
ds.Tables(0).PrimaryKey = New DataColumn() {ds.Tables(0).Columns(0)} 'Where 0 is the index of the column that's your key
row2 = ds2.Tables(0).Rows.Find(row1("ID"))
'if its found, delete it
Next
Next
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Nov 4, 2010
I am trying to figure out a way of combining the below Dim statements into one line and maybe also combining Return dblResult into there. currently it is three lines and I have been told that it is possible but kind of lost of how to do it
[Code]...
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Oct 21, 2009
i would like to ask how can i combine 2 .exe files into 1 .exe file. for example,
1) a.exe
2) b.exe
combine into ab.exe
a.exe must install first, after that b.exe will continue.
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Aug 7, 2009
I'm trying to combine 2 byte arrays and then create a new byte array that contains the contents of both but running into a problem. The error says 'Source Array was not long enough.' I'm trying to combine HeaderByteArray and bytBuffer into newByteArray. I don't understand what Source Array is not long enough means and how to correct this.[code]...
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Mar 29, 2010
Im trying to combine 2 items in a listbox and in between them theres a split[code]...
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May 22, 2012
How can I combine 2 or more text files into one? I prefer to use vb script but other ways is ok too.
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Jun 30, 2011
I have a webform that users put in details and this goes to a database - this all works fine.The form is a FormView (Expression Web) and as I have added to other stuff to the page I can't use the standard "insert" button on the form view some I have add an asp-button to run the insert - this also works fine.What I am trying to do is to get the page to send me an e mail when a user has completed the form - this is the problem ,The insert works fine when I click a button,The send e mail works fine when I click a button BUT I need to combine them so the user only has to click once.At the moment I have two functions running on 2 buttons
InsertButton_Click and SubmitForm_Click
How can I combine this to both run on InsertButton_Click[code]......
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Feb 28, 2009
I can combine windows application and web aplication.Can i develop main page in web application then i want to access to the windows application.(e.g there's a button to link process mgt page.But process mgt page is developed in windows application).Else, if i do a view page on windows application and to retrieve the data is from web application. Example, users may fill the form through website, then to display the information is in windows application.Can i retrieve the data from the same database(SQL server dbase).
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Jun 27, 2011
I was wondering if there is any way to combine events in VB.net. I am using a windows form and have three events for each button that does a different action. I would like to put all three events in one method but am having trouble doing this. Below is an example of one of the buttons. For the ease of the question I removed all the code inside each sub.[code]....
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Jan 11, 2010
How do I combine multiple files into the one file with a new extension. No need to be compressed. So I avoid Zip or similar solutions. (Actually don't want to add third party solutions into my application.)
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Sep 8, 2010
I have three arraylists (datasets and subsets) that I need to combine into one arrraylist so I can databind it to a repeater control and then present data to the user. As far as I know, you can only bind the repeater with one datasource (please correct me if this is wrong) that's why I'm combining these arraylists.Each arraylist has an ID from the database which I can use as a datakey to keep the data aligned. How do I combine these lists?
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