Asp.net - Function Chaining Depending On Boolean Result
Jun 7, 2010
This is just an efficiency question really.. I'm interested to know if there is a more efficient or logical way that people use to handle this sort of scenario.
In my asp.net application I am running a script to generate a new project my code at the top level looks like this:
Dim ok As Boolean = True
ok = createFolderStructure()
If ok Then ok = createMDB()
[Code]....
I create a boolean and each function returns a boolean result, the next function in this chain will only run if the previous one was successful. I do this because an asp.net application will continue to run through the page life cycle unless there is an unhandled exception and I don't want my whole application to be screwed up if something in the chain goes wrong (there is a lot of copying and deleting of files etc.. in this example).
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Mar 18, 2011
I have a basic bubble sorting algorithm that can sort either A-Z or in numerical order with just the change of a "less than" or "more than". However, I have to use the code twice in order for it to sort correctly.
'Sub Sort(ByVal array As Object)
'--A-Z
If Array(i) > Array(i +1) Then
[code]....
Anyway, if there is a way to do it, that'll allow me to have just one sort instead of having two sorts which use the same sorting algorithm, but just a different comparator.
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Jun 6, 2012
I have a small section of a windows form that allows users to select when a customer should be called (i.e. day of the week, time and inbound or outbound)When the form is loaded I will extract the information using a dataset and bind to form controls. I want to use a combo box for call stautus - inbound or outbound - however wish to give the user the choice at runtime.My thoughts are I would need to set a static list (so the user could choose) and set the default or displayed value to the info the dataset has extracted.This code to select the index doesnt work when I am comparing the dataset result to the "Outbound" string even though I am using the ToString method.
Private Sub TestTelesalesForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Me.Telesales_DEV004016TableAdapter1.Fill(TelesalesDataset1.Telesales_DEV004016)
Me.comboCallStatus.Items.Add("Outbound")
[code]....
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Nov 5, 2008
Below is my formula for a field in my report. All fields are of value type 'Number'. When I try to save the formula it gives me error "The result of selection formula must be a boolean." Why is this? Sometimes it does not catch it as an error, but when I actually run the rwport with real data, it shows the error again. Sigh.
[Code]...
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Dec 6, 2010
Im trying to change the information on each row depending on the result from the query. Im thinking that at the minute my problem is that I'm only returning the first result from the query into the result.
e.g. query returns row 1 with '1232' row 2 '1243' but result is only ever set to '1232'
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May 7, 2011
I have a query which is pulling values from a table in MS Access
SELECT
tblInstructor.InstructorID,
tblInstructor.Football AS InstructorRole,
[code].....
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Jan 13, 2012
I have an application that i am writing that polls machines every 40ms and depending on the result of the poll sometype of action is taken. i have each machine that is polled run in a separte thread. this all works fine.
what i want to add to it is to use a timer and either on a tick or elapsed time fire inside of each thread at lets say a 1 minute interval to update a file with stats about each thread and the machine it is connect to. for example below if a start polling 3 machines on com1 2 and 3 and poll them. machine 1 may have 102 copies machine 2 200 copies and machine 3 400 copies. i want a timer theat ticks every 1 minute that will fire within each thread and record those results
[Code]...
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Feb 17, 2011
I'm currently working with a client's VB.Net code, which was developed for them by a small development shop a few years ago and which they purchased and have been maintaining and uprgrading since. This client's primary developer is out on indefinite (likely permanent) medical leave and I'm now filling in until they bring in a full timer (as I'm a contractor here). My current task is to add some functionality to a the VB.Net code they purchased. I'm finding practices and techniques in the code that absolutely baffle me and can't make the code do what I want. I'm starting to wonder if it's me and was hoping to get some thoughts on the code I've encountered.
For example: Setting a variable to accept the result of a function by calling the function with many parameters, clearing the parameters in the function, setting them to some value, calling another function with those new values, then never using the values returned by the functions. I'll add a code snippet in the first comment since this is already getting long.
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Mar 14, 2012
I'm making a class and I have a function in this class the is looking to see if a user account in enabled.
Public Function IsEnable(byval user as string) as boolean
'if user is enables
return true
else
return fulse
end function
What is it just does not find the user, how would I return an error that the person using the DLL could detect and catch?
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Apr 2, 2010
How can I create a function from this example:
Private Function CheckForNull(fieldvalue as string) as Boolean
That checks that all my fields are not empty? For example, say I have three fields txtFirstName, txtLastName, and txtAddress. How would I write the function above that would check that these fields were not left empty?
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Jul 28, 2011
I have a math program that I am working on. One of the exercises has a random word and 6 radiobuttons. The user has to select the radiobutton that displays the exact number of letters in the random word. What I am having trouble with is creating a Public Function to check if the answer selected is the correct one. The radio buttons are within a groupbox. The Public Function returns a boolean True or False.
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Jul 18, 2011
Simple code! where am I going wrong. I get end of statement expected in line 4 after valid.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If valid('0') Is True Then msgbox("HI")
End If
[code].....
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Sep 21, 2011
I have a HTTP class that gets content from URL's, POST's content to URL's etc and then returns the raw HTML content.In the function inside of the class it detects if there is a HTTP error and if so I would like to return false but will this work if I have declared the function to return a String?
Code Sample of what I am trying to do (Note the Return Content & Return False if a HTTP error code is detected)Public Function Get_URL(ByVal URL As String) As String
[Code]...
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Jun 3, 2011
How to test the null value BEFORE calling the other constructor?
' class MyHoyr '
Public Sub New(ByVal myHour As MyHour)
' Can't doing it here !!!! '
[code]....
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Jan 18, 2012
I am having trouble with using sumifs excel function in vb.net. I can use sum function with "cells" but I could not get result from sumifs function with "columns".
It is giving "OleAut reported a type mismatch." error.
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim oExcel As Object
[Code].....
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Sep 22, 2011
I have a problem with Asc() function as a blow picture,I will explain each step as I do.First I convert some values to ASCII code and store in value variable, then retrieve 3rd position of variable (4th line of the picture.)
and use Asc() function to find result which it show 63. (like 5th and 6th line).But I try to manually use Chr() function, the result become 2nd and 3rd line.So for the Asc("ˆ") func. result should be 63 or 136?
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Nov 17, 2009
From what I read it is a good convention to name a method that returns a boolean value with the prefix of "is" or "has". So in keeping with this convention I am trying to name a method in my program with this prefix but I am running Specifically I have a class called Day. It is a simple class with a few data members and one method that returns a boolean value of true or false. The name of the boolean variable is isSpecialDay. This class has a method called isSpecialDay which takes the date of the day, applies some criteria to the date and then sets the variable isSpecialDay to true or false. My problem is that the boolean variable is named isSpecialDay and so it the method. What should I do?
Public Class Day
Private TheDate as String
Private DayName as String
[code].....
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Dec 1, 2009
I would expect the following vb.net function to return a value of Nothing, but instead its returning a value of 0.
[Code]...
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Jul 11, 2011
I am using the following code in my project. I want to find the number of days by given the last date and now.[code] for example, when BorrowDate is "01/Jul/2011" then the result is 7 days which it should be 10 to now.
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Oct 7, 2011
When I was coding a program, I was able to find the result of a function in the Immediate Window by using:
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Jun 16, 2011
I have something that I want to do and what looks very simple, but I cannot get it to work. I want to build a function that gets as input a xdocument and some other strings. It should have a return that contains a filtered part of the xdocument in a way that I can use it as input for a new Linq function. This is what I mean:
Private Function fncGetFilteredDecendantsOfNode(ByVal xdocDoc As XDocument, _
[Code]...
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Apr 15, 2010
I am working on a project that requires me to hop into to separate DB's. So I have figured that I need to have multiple functions inside of my VB page. The only problem I am having,is I am not to sure how to get this all accomplished. So far I have figured out the overall structure, just need to implement that structure.
Here is my idea:
The main Function would call two other functions. We can Call them Sub Function 1 and Sub Function 2. So, the main Function takes the saved sessions information for the E-mail address and dumps in into Sub Function 1. It needs to open up a new connection to the db/stored procedure and RUN the following procedure and then return the result. Here is the stored procedure and what I think is correct.
CREATE PROCEDURE WEB_User
(@EMAIL_ADDRESS varchar(80) = [EMAIL_ADDRESS])
AS SELECT MEMBER_NUMBER
FROM WEB_LOGIN
WHERE EMAIL_ADDRESS = @EMAIL_ADDRESS
So my question is, what is the function suppose to look like? how do I send the session information to the procedure? and finally, how do I return the stored procedure results and push back into the main function so it can be carried into sub function 2?
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Apr 18, 2012
I need to hash a number (about 22 digits) and the result length must be less than 12 characters. It can be a number or a mix of characters, and must be unique. (The number entered will be unique too). For example, if the number entered is 000000000000000000001, the result should be something like 2s5As5A62s. I looked at the typical, like MD5, SHA-1, etc., but they give high length results.
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Mar 19, 2010
I am trying to format a Function Code so that it returns a 4 digit result no matter the entry by the user (i.e. they enter 540, stores 0540 in the database). While looking online, I've found the format function, but when I use it, it returns 540, regardless if I enter 540 or 0540. [Code]
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Dec 7, 2009
Can someone on the VB language team explain why a function result type is not part of the parameter signature?If it were then function overloads would also work for functions that only differ by the result type. In some cases, this is useful (aka cleaner code) especially when you have strongly typed data.
Other languages have this and implement it by considering the function result as an OUT parameter either as param 0 or at the end of the param list (stack) so existing type matching verification can be performed by the compiler.
In VB, the workaround is just messy and would be easily fixed by a language change. This example is overly simplified and not meant as a solid justification for the request Say you have a parse requiirement that takes a comma delimited string in the form: "31,32,33,34" or "bob,carol,ted,alice"
In you code,
[Code]...
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May 25, 2011
I am interested in developing a multi-language program that will have a main .NET GUI but will perform calculations by calling procedures from a Fortran95 dynamic link library file. Right now I am just playing around with a very simple project in order to get the interoperability between the .NET framework and a Fortran95 (*.dll) file working correctly. So far, I've been able to pass the Fortran95 (*.dll) file an array from VB, sum all the elements of the array using an intrinsic Fortran function, and pass the scalar result back to the .NET framework with no problem. However, if I try passing Fortran the exact same array, construct the transpose of that array using another intrinsic Fortran function, and try passing the transposed array back to the .NET framework I keep throwing an exception. I am not a programming wiz, but it appears that when Fortran stores an array in memory, the .NET framework doesn't know how to read that. I am looking for some guidance on how to pass an array from the Fortran95 (*.dll) file back to the .NET framework.
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Jul 15, 2010
I have a whole slew of database access functions which assume a particular connection string. Within my application I call
[Code]...
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Mar 2, 2011
I have a function in a module that returns a datatable.I need to call that function asynchronously and get the results in the Main thread (Main Form) in vb.net.
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Jan 9, 2010
I would like to allow my users to decide where they want their data to reside. I have created a data source which is referenced by crystal reports. I would like to replace the |DataDirectory| to point to a path the user selects. or if possible substitute it with vb function.
Below is the line in xml that point to my db. I would like to allow it to call a vb function that will return my db path I am not sure how to replace the connection string by using a vb function in xml.
<Connection ConnectionStringObject="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|MY_DB.mdb;Persist Security Info=True;Jet OLEDB:Database Password=pass" IsAppSettingsProperty="false" Modifier="Assembly" Name="MY_DB.mdb" Provider="System.Data.OleDb" />
I would like to replace |DataDirectory| with the result of a function called MyDBPath(), can anyone assist.
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Apr 22, 2009
I am working in excel trying to setup a function involving multiplying a cell by a set number and then having the result round to the nearest 10. Here's the beginning of my function statement fx=e3*1.026. say the result is 8654, I need it to round to 8650. Also if it comes back 8655, I need it to round to 8660. I have about 2,000 records I need to do this to so I was hoping that one formula or statement could be used for all my data.
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