Build A Function That Takes The Exact Parameters Of CType?
Nov 2, 2009
what exactly is the type of the second argument of CType
CType(testobject, Control)
what exactly is Control? how can Control be used as though it is an expression?i nid to know this because i'm trying to build a function that takes the exact parameters of CType, let's call it CType2public function CType2 (byref object as Object, byval thetype as Type) as Object problem is when i do this: CType2(testobject, Control) they give me "Control is a type and cannot be used as an expression".
I'm currently invoking a function that takes ByRef parameters using Control.Invoke (which I notice specifies the Object parameter array to be ByVal) but the array of parameters I give it isn't updated by the function. Is this possible with VB.Net 2003 or must there be some error in my code?
This project has been upgraded from VS2003.Was fine at first but now is taking so long to build after make small code changes my development has come to a screeching halt.Its a fairly big project but hasn't grown since before the upgrade.VS2003 only took seconds to build.Also during the 30 minutes the CPU is pegged at 100%
I'm a relatively seasoned VB (COM) vet but this is my first VB.Net application and as is my luck a web services application feeding off a site that I can't publicly mention nor can I post any code that may expose the site.
So, here's the problem. I have written a simple form and have 2 buttons. 1 button simply asks the webservice for it's version. This works no problem. I was able to load the web reference using their supplied WSDL file for this "version" class. Now that I have that working I think "GREAT, that was straight forward. I have my credentials, urls, etc working, the rest of this should be just as straight forward." (See where I jinxed myself here?)
Anyway, I move onto the next WSDL and set of classes and get that reference added no problem. (Man that took a LONG time, like 20 minutes.) I then build my "Get my order data" code syntaxes on the prescribed exposed classes and run my project just to see what errors I get. The "run" process takes almost 45 minutes to an hour..... It's as if the app is getting the WSDL set all over again but doing it over and over..... I have no clue what's going on.
I've tried to disable all the Windows 7 "potential" issues, UAC, firewall, etc, but these changes don't help. Anti virus, spyware, etc all these are off and no difference. I'm running VS2008 as an Admin, right click "run as admin", and have complete control over this machine. Any ideas, suggestions, etc are VERY welcome and I am happy to expose as much of this application as I can providing I can stay with in the rules of the confidentiality contract.
I'm trying to bind a datagridview to a tableadapter which contains a query that requires parameters (for the WHERE statement of the query). The datasource is a SQL Server database. When I bind the datagridview in design view, it does not let me choose which tableadapter method I would like to use. The way I've been fixing this is to go into the code behind that form, where Visual Studio puts in some auto-generated code that fills a datatable in the dataset and I change the method that it's using there and put in my parameters. I don't think this is the proper way to do it, however, especially because sometimes that code doesn't even get generated! My other solution is to just programatically bind the datagridview to a datatable which I have filled using the tableadapter. This seems like more work than it should be, though.
To have a function that takes the average (which is calculated by a different function) say for example the average is 6, now the function is to take the number 6 and get the variance from six to another number lets say its 12 so this will return a calculation of 50% variance. now here comes the issue, i have it calculating the variance how ever lets say that there is a score that is 0, how can i make it calculate the variance without taking count for that 0? i guess you can say i need it to "skip" if its a 0.
Does DirectCast, ctype, etc., are common function? Why it return type, and how do I used it? Is there others function where I need learn to be dot net expert?
Though i used it a lot of times while inserting,updating or deleting the entries of the database but my basic concept about this statement is not clear.......
I have the following search code which works fine. However, I have an additional task to do, which is create a count function for the Record found or Record not found. Presently what it does is it searches and if a record is found it displays at the tooltip "Record Found" if not it says "Record Not found". However, sometimes you have 2 or more records. Therefore, the tooltip should say the exact amount of records found.. For example, 3 Records Found or even 5 Records Found. Also if only one record is found it says "Record Found" but if more it should display " 2 Records Found".
Private Sub btnPerformSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnPerformSearch.Click ' Declare local variables... Dim intPosition As Integer ' Determine the appropriate item selected and set the ' Sort property of the DataView object... [Code] .....
is there a way to get the GET parameters and POST parameters in just one function or Collection in ASP.NET? Like using $_REQUEST in PHP? I'm using VB.NET.
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.
I am using 8 different vb projects in one solution, beside this I am also using one 3rd party control ion all the projects, while compiling the application it takes around 5 minutes to build the project, While building the application I have observe that it uses lc.exe file which is used for "Reads text files that contain licensing information and produces a .licenses file that can be embedded in a common language run time executable." at this point it takes too much time.
Is there a way in vb.net to create a sub/function that will take as an argument some kind of pointer to another function, and allow this new sub/function to execute the passed function? What I have are 10-12 xml-rpc functions I am calling against a remote server. Each of these functions has different argument lists (one takes 1 string, another might take 3 strings and one int, etc). All of them return an object.
Actually, I am trying to find out whether the partno is existing in the database table or not and it takes long time in count = checkCommand.ExecuteReader statement
Public Function CheckProductNo(ByVal Partno As String) As Boolean Dim count As SqlDataReader Dim valid As Boolean = False Using connection As New SqlConnection
I'm a beginner and doing a review for my final...the question is-Write a Function procedure that takes an array of Strings, sorts it using Shell sort and returns the sorted array. I do not get shell sort at all.
This is probably a stupid question, but how do you make a function which takes a number then does an operation to it again and again until it gets a vlue which it already has seen, when it returns all of its values? I have this function:
Private Function fractal(d as string) As double Fractal = Val(D) * (Val(D) - 1) Fractal = FormatNumber (Fractal, 2)
I've been looking at threading to make my webapplications more responsive. I've found out how to thread a sub that takes no variables and doesn't return anything, but I can't find out how to achieve this for a function that takes variables and returns something. here is an example
An in-line table valued function in SSMS takes about 6 seconds to return 11088 records. The same function in VB .Net 4.0 using TableAdapters.InputTableAdapter.GetData (Created with data set designer) takes about 15 minutes complete.Both are executed from the same workstation.Why does this discrepancy exist?
i want to get all available midi device by name. i found this: Declare Function midiOutGetID Lib "winmm.dll" (ByVal hMidiOUT As Integer, ByRef DeviceName As String) As Integer
where the VS debugger refuses to show certain field types including dates.My call stack contains FunctionA which calls FunctionB. FunctionB has about 45 parameters and many of them are dates.When I step into functionA,
1. the debugger refuses to show a date variable when you hold the mouse over it. It just shows {Date} instead of a value
2. If you do quick watch on that same variable, it also just shows {Date} instead of a value
3. If I do ?variablename in the immediate window, I get "System Error &H80131c23&"
When I comment out the call to functionB, the date variables all show correctly in all the above methods. I will stress that the code has not yet reached functionB, just its very existence in code screws up the debugger.I'm thinking this is a memory issue and maybe vs debugger can't cope with a huge function stack frame dataspace.devenv is only using 268Meg of ram on a 2Meg box, with not much else running. Thats reasonable for this size of project.
I'm writing a VB.NET function with a ton of overloads. I've seen that most .NET functions have parameter descriptions in IntelliSense. For example, when typing in String.Compare(, IntelliSense says Compares two specified System.String objects and returns... you get the idea. This description changes and you click through different overloaded versions of the same functions. When you start typing in something for a parameter, it describes the parameter you're currently inputting as well. Example: strA: The first string to compare..
I have to create a program that finds the total cost for pizza, fries, and soft drinks, and places that in a list box. So far, though, I'm stuck. I have this code so far:
Public Class frmBill Private Sub btnTotal_Click(ByVal sender As System.Object, [Code] .....
The errors that I am getting are: "Argument not specified for parameter 'D' of Public Function totalBill(P As Double, F As Double, D As Double) "Argument not specified for parameter 'F' of Public Function totalBill(P As Double, F As Double, D As Double) "Argument not specified for parameter 'P' of Public Function totalBill(P As Double, F As Double, D As Double)"
i am using XML as database, so updating or inserting diffrent XML's currently i am manage a seprate class for seprate XML file, this process consuming my lot of time, i want to create a genrelize class. currently according to the XML need i am sending two, three, four or five parameter in my function.
now i want to send array of the parameter to my function, so becoz of this thing i could mange all of my functions via a single class...
i am sending u the example what currently i use now...
Public Function Update(ByVal Item_ID As Long, ByVal ProductName As String, ByVal Price As Long, ByVal Path As String) As Long Try
Can we pass parameters to a function using delegates
Private Sub UpdateLabel(byval text as string) If Me.Label1.InvokeRequired Then Me.Label1.Invoke(New MethodInvoker(AddressOf UpdateLabel)) Else Label1.Text = text
