.Net Framework 3.5 And 4.0 - Uses Basic Math Functions And Display The Data In Datagridviews
Jul 1, 2010
So im using the inno installer to set up my project and i found a nice script that will check and download 3.5 framework, but can't get it to work for 4.0 so my question is would i be able to compile my project in 3.5 and everything still work correctly?
My program just uses basic math functions and display the data in datagridviews. It uses webbrowser and other toolbox options. It doesn't use the registry and only creates one txt file.
well i am having a couple of issues with this particular homework problem and this is my first programming class so there is probably quite a few mistakes well the homework problem is to take three double values entered by a user and display the largest and smallest using math.max and math.min and display the smallest and largest so i thought i could use a listbox and take the values that went to the listbox and assign variables to each so i can try to use each variable in the math.max and min but im not making it to far and i actually might be way off
I've a problem using simple logarithm function Log in some ButtonClick Event. Log is underlined with next warning:System.Diagnostics.Log is not accessible in this context because it is Friend.
Have I missed something or this happens because of the Express version of Visual Basic?
I'm making a part of my program that takes three inputs from the user and adds them then divides that number by three (the average of the three numbers). [code]...
Is there a way you can do this ? I would like to have a collection class of T that would be able to do addition, substraction on the T type. I would like to keep T generic instead of having couple collections with the same code, but different types. How would you constrain the generic T?
Example: I would like to define a Collection(of T as IDoMaths). I wouldn't like to create my own integer etc classes with named methods to do the operations, because I think it would be slower. This part of the code is actually called very often and tends to be the bottleneck in performance.
I was wondering how to get a certain data from a MS database and display in a label. Example(Database entries)
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The name will be displayed in the label depending on the year and number typed in two text boxes. So if typed 2009 and 1001, the label should display name2. I don't have any background on SQL. The only thing I did for now is that I added the database in the data sources and added a TableAdapter.
For greater accuracy I should use a Decimal instead of a Double ( so I've been told ). Why then have Microsoft chosen to use DOUBLE for most of the functions that return a floating point value in the Math Class?
I have an idea, but i am not sure how to implement it with code.I have an application where a user can view current bookings for rooms.I have two datagridview controls, the first one shows the rooms and the second shows all my current bookings.What I want to be able to do or more the user, is click on a room and the current bookings for that room (datagridview1) to be shown in (datagridview2).What I think I need to do is apply a filter and a sort in a sub routine, then link my tables with a binding source.
I'm trying to generate my own dataset and create parent/child relation on the fly so that the subsequent datagridviews (dgv) that will be displaying the information will filter each child dgv by the record chosen in the parent dgv (I hope this makes sense).
So far I am able to display info in each dgv, but every record from each corresponding table is displayed in each dgv- no filtering is occuring. I think the problem might be in how I'm creating the relation and/or how I'm linking it to the dgv. Here's the code I have on the UI:
I go to install visual basic 2008.. and it says that an error has occurred. and that .net framework 3.5 could not be installed? I've tried other programs like visual studio and visual c++ and they all do the same thing. and i've also tried directly installing the framework and it still wont work. Sorry if this is not the right place for this post but i couldnt find a tech support forum?
I am creating a Visual Basic 2008 .net application that will be using the Sync Service for ADO.NET on Windows 7 Ultimate. The back end database is SQL 2008. Below are the basic steps I take when the error occurs
a. Add a Local Database Cache item to my application b. Use the Configure Data Synchronication wizard for the setup process c. Click the OK button to accept changes d. An error message is generated, "The given key was not present in the dictionary".
I have attempted this several times and the error message presists no matter how I vary the options. I have also installed Microsoft Sync Framework 2.0 successfully but the error persists. I also have all the following Dlls referenced in my project:
I am sure I don't need all of these references but I figured it does not hurt to have them all referenced for now. I have the latest OS service and Visual Studio 2008 service packs.
In this application I need to allow users to enter a month as integer (1-12) then use integer tryparse to validate that input, that seems to be the easy part. I need two create two functions, one that returns the name of the month and the other returns the number of days in that month. The arrays are supposed to be defined and initialized within the function so that the main program can take the user input and call the two functions, then return the appropriate values as output to labels. I am not sure how to declare the arrays in their appropriate functions and then how to call those functions to retrieve the right value from the function.
I am still working on this. From the main procedure call a function procedure which calculates and returns a value for the "hypotenuse" equal to the square root of (x squared + y squared). You will have to pass the values of x and y to this function procedure. The procedure should calculate and return a double type value. The value that is returned by this function procedure should be equal to the square root of (x squared + y squared). Also from the main procedure call a sub procedure to display the values of x, y, and the hypotenuse.
Here is what I have so far. Now would I declare this in the x or should I have x and y together? Option Strict On Option Explicit On Module Module1 Sub Main() Dim x As Double = width() Dim y As Double = height(x) Console.Read() [Code] .....
I want to write an event that will simply display something when it is raised. I have never really worked with event driven programming before and am just trying to get a simple example working. It is not yielding any errors, but when I switch to debug mode I can see that the event it not raising correctly.
I am trying to display *.rpt file in visual basic submit form, how would I do that? I have Report2.rpt and Form1.vb, I like to call Report2.rpt when submit button is clicked, it will then show the report on screen.Private Sub SubmitButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SubmitButton.Click.[code]And also how do I get the date to be queried in my crystal report, I don't want all records, I just want the records in between fromDate and toDate.
I would like to have custom methods to pass data between function, or to keep it in memory throughout the program.
Example:
Private function info() Addr1 = addr1.text Addr2 = addr2.text City = city.text
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Could I run this function towards the beginning of the program and use it throughout until the form is disposed? I can't seem to get the information to stick once I get out of the function, I will need to use the same information multiple times throughout the application so I figured if I could make a function to keep the info rather than declaring the 5 lines in every option but anytime I call the method, it fills it correctly then when I get back to the main function the info goes back to 'nothing'. is it possible to pass data around between functions like you could in Java?
I have only 2 sets of "fixed" numbers used, that I need to be able to toggle between. Particularly, for array sizes/for loops. Is it best to use "Collections" in VB.NET to accomplish this?
I want to be able to have the user type in a function, say ,x^2 + 1, and have the computer store this such that it can be recalled and plug in a given value for x. For example, say they type in x+4, the program will then (in a bunch of different text boxes) return the value of x+4 when x = 1, x = 2, and so on up to x = 10. But how can I get it so that it will store x+4, be able to recall it and replace x with it's given value
I have created a simple app to display a digital clock, it can create child windows (dialog boxes) to do various chores, one of those chores involves a lengthy background task, so I create it in a modeless manner, so it doesn't block the main program. It all works well... kind of took me awhile to figure it all out, but there is one little cosmetic issue.
I'm only getting started with VB.Net, using VB Express 2008.Using the System.Data.SQLite wrapper, I need to read data off a SQLite database file, and chart data using basic bars, pies, lines, etc. Nothing fancy.
I'm having a heck of a time figuring this out, the tutorials I found on the web are not complete or are for VB 6.0 (obsolete in some cases). On the C++ side I have the following ::
"Dromocast Client" is my visual basic application, and I checked to make sure it's not NULL. In fact I get made sure I'm getting some data on the VB side. On my Visual Basic side I have the following
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When I send the data over it's garbage, meaning strTemp comes out as all these chinese characters, and my title bar on the visual basic program gets garbled with a bunch of chinese characters as well. My guess is my "SendMessage" is written wrong, or I'm doing something silly, but I have no idea what. I'm not a windows programmer so I'm kinda trying to figure this stuff out by googling.
I am used to using datasets for my projects in terms of data access. I now set myself an easy app to work on in order to learn the entity data framework and how to retrieve & manipulate data.Can anyone guide me through on where to start, what are the advantages of this model, In what scenarios should I choose to use entity framework and what are the things (basis) I should now before starting.My datasets are working fine too. Are there any reasons for me not to stick with that way of accessing data? Or is this something to consider depending on the users of the website (for speed purposes etc.)
