Is there any class or specific method for getting non-primitive types in an assembly? FieldInfo.Gettype() will do for primtive types but what about non-primitive types?
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Given a list of objects, I'd like to print a string version of them just in case the object.ToString() result is a relevant string.By that I mean I don't want to get things like:
obj.ToString() -> System.Collections.Generic.List`1[MyLib.Dude]
obj.ToString() -> System.Collections.Generic.Dictionary`2[System.Int32,System.DateTime]
obj.ToString() -> System.Byte[]
But I want to get things like:
obj.ToString() -> Hi
obj.ToString() -> 129847.123
obj.ToString() -> Id = 123
What should be the best way to implement this in a method:
Public Sub PrintInterestingStuffOnly(ByVal coolList as Ilist(Of Object))
For Each obj in coolList
'insert solution here
[code].....
during some code conversion from another persons VB.net project to C#, i have come across the following code:
[Code]...
Now m trying to convert this to C#, but im a little confused as to exactly the meaning of this line:
If lbytRelayStateMask And (2 ^ lintCounter) Then It appears there something going on behind the scenes (that ill have to examine further) however before i do i would just like to clarify the result of this if statement. Am i correct in saying if either one of the sub-expressions equals zero then its false, otherwise its true? Sorry, im not too up to speed on VB.net.
addressing the need for getting the bytes of an object. But I am wondering if there is an approach to calling BitConverter.GetBytes on a generic type where I know the type is a primitive (Int32, UInt16, etc).
Public Sub Foobar(Of T as Structure)()
Dim x as T 'Assume T is declared as Int32
Dim y() as Byte
y = System.BitConverter.GetBytes(x)
End Sub
The above will throw your usual error:
Overload resolution failed because no accessible 'GetBytes' can be called with these arguments:
'Public Shared Function GetBytes(value As Double) As Byte()': Value of type 'T' cannot be converted to 'Double'.
'Public Shared Function GetBytes(value As Single) As Byte()': Value of type 'T' cannot be converted to 'Single'.
[code]....
One solution I think would work is a large Select Case calling GetType(), but that is horrendously slow (because of boxing) and looks ugly. I would think that since I call my higher level class with a primitive data type for T, that the compiler would be smart enough to figure it out, but I assume I am not providing enough information for it to derive what T's underlying value is at compile time for the invoked instances.
Is it possible to extend primitive types such as System.String and System.Int32 (IE: integer) in .Net 4 and if so how?
To be more specific, I am aware of the concept of partial classes but this doesnt seem to be the answer. Also I find that System.String is not inheritable and Int32 is a structure.
Lastly I am interested in knowing both a VB.Net and C# answer to the above question.
primitive types (integer, string, etc) are now classes. However to access the value of the class you just use the object name (ex, x=y). It isn't necessary to refer to a property of the class (x.value = y.value).
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When I am loading an Assembly dynamically, then calling a method from it, I appear to be getting the method from Assembly executing before the code in the method that is calling it.It does not appear to be executing in a Serial manner as I would expect. Can anyone shine some light on why this might be happening. Below is some code to illustrate what I am seeing, the code from the some.dll assembly calls a method named PerformLookup. For testing I put a similar MessageBox type output with "PerformLookup Time: " as the text. What I end up seeing is:
First: "PerformLookup Time: 40:842"
Second: "initIndex Time: 45:873"
Imports System
[code].....
Write an overload for every numeric type or if possible constrain a generic extension method to just numeric types.
View 2 RepliesWe are seeing an Exception while trying to get the types from an assembly using Reflection.
Dim assemblyLibrary As Assembly = Assembly.Load(System.IO.File.ReadAllBytes(testSetAssemblyPath))
'Getting all class types
Dim classTypes As System.Type() = assemblyLibrary.GetTypes()
I'm returning to my old question since I've never been able to find an answer.
For example I have a class library A with a method Method, is there a way to load this assembly from my application B and execute this method (A.Method) without putting a reference to assembly A?
My idea isn't that the idea behind System.Reflection?
So far, I can only load the assembly, I can even enumerate classes, members, etc, but I cannot figure out how to invoke methods and read property values.
First let me say: I am still very inexperienced with VB.NET so there is probably something simple I am missing, or at least that's what I'm hoping. I've been writing a COM exposed wrapper class to provide access to a web service in a legacy VB6 application. I got everything pretty much working as I wanted - all the COM properties, methods and events are showing up in the VB6 app - but for one minor detail: when I used a method which made a call to the service, it was obviously only working asynchronously, so I couldn't update a progress bar or do anything else while waiting for a corresponding assembly event to fire.
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I am getting a
"Method not found: 'Boolean MyCompany.LibraryAssembly.SomeFunction (System.String)'"
Exception/error when running a VB.NET console application. The method is part of an external assembly and it is definitely in the assembly. The error only occurs at runtime when I go to enter the function that calls the method. I have the assembly referenced by my project and I am not copying it locally. Intellisense shows no errors, and neither does the compiler. I am loading the assembly statically not dynamically. I reference the from a local folder (not the GAC) although the same version is also available from the GAC.
I have this situation where LoadWithPartialName appears to be the only good alternative, although it is marked as Obsolete. I work in a very tight dev environment with versioning and deployment policies that cannot be easily changed or bypassed. Let's say there's a .NET executable that I have no control on (from another division). Let's call this the client AppA application. AppA's version is 10.11.12.x. Application AppA has a direct reference to one of our class library that provides some service to the caller (returns some information).
Let's call it SvcB and the version is also 10.11.12.x. Now, AppA's division does not need to update their system as often as we do, so AppA's version will stay 10.11.12.x for some time, probably until we decide to change the format of the class that is exchanged between us. Our division needs to change the logic behind the service SvcB more often and the version must change with every major deployement.
So let's say we change the logic and we deploy a new version of SvcB, 11.02.11.x. AppA will still reference the old version, so the logic being used is now incorrect. We are thinking of creating a new "facade" to our service. Let's call it SvcFrontB. SvcFrontB's version will stay the same, in sync with the AppA's own version. Now I need SvcFrontB to load the most recent version of SvcB through reflection. This way, I am sure the latest logic is always used. How do I achieve that without using LoadWithPartialName ?
I'm using Autofac and want to resolve the correct implementation of the current assembly I have a DataContextFactory Interface and Class:
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I am having a strange issue when building assembly's for one of my modules.I was getting errors when running on 64bit which I traced back to being related to the assembly being 32bit specific. Our modules are(or should) all be built to be bit agnostic.Running CorFlags.exe on the assembly showed the following.
Version : v2.0.50727
CLR Header: 2.5
PE : PE32
[code].....
For example, assume that in my assembly, in Namespace A, Class B, there is an instance method with the following signature: void Test(string someString, int someOtherParm, string someOtherString ); This method is called multiple times, from multiple places in the assembly. I would like to be able build a list of all invocations of this method and the value of the someString/someOtherString (assuming they are hardcoded). In other words, I like to extract a list of calls like the example one below, if they happen in the assembly somewhere: Test("some text", 8, "some other text");
View 1 RepliesIs this possible in object-oriented design? I'd like to specify that in an inheritance tree, the type of a property in the child classes is different from the type of that property in the parent class. But the types are polymorphic because they derive from the type used in the parent class. e.g.:
[code]....
Our company has an app that load their components by System.Reflection.Load (By the way, an awesome technique )But, we start to monitorate the application and detect a extrange grow up of memory (actually when our application still all day on air, their allocate memory on task manager is 200 MB plus memory) And all of our components (60 plus DLLs) is load by this technique.My doubt is how to deallocate this assemblies or how the best way to deallocate any assemblies loaded by the System.Reflection.Assemblie.Load method?
View 10 Repliesfor example if a person types in multiple characters that represent a certain image in the input box for example if i type "tom" in the input box each letter represents a different image. Can i display those 3 images on the form somewhere? this is what i have so far...
Dim character As String = InputBox("Please enter a word")
I know that much but im not sure how i can connect the letter with a image for example
PictureBox1.Image = My.Resources.pic02
i want t to = my.resources.pic02 and i want it to display on the picturebox1.image
I'm using Visual Studio 2010 and automating Outlook 2007. I am writing a program that executes on incoming mail (which I have that working), but I want this program to inspect the subject line for a 5 character string that will be in the format of AB123 (can be any 2 letters followed by any 3 numbers). What is the best method to accomplish that?
View 1 RepliesI am curious about the string and primitive types. Article like this says string is primitive type. However second article on MSDN does not list string as primitive type. However when I ran the code provided in second article, it displays String is not Primitive type.
View 8 Repliesthere anyway that we can create our own primitive type? let's say we call this
Code:dim test = 4 then test will automatically be an integer right but i wanted this
Code:dim test = 4% and i want test not to be an integer, but a percentage_integer, in other words, my own primitive type. is that possible?
I need to have a specific process(method) run once a day at a given time and was wondering if this can be done using the timer control.
View 2 RepliesI have a situation in which I must execute a dynamically built stored procedure against tables that may, or may not be in the database. The data retrieved is then shunted to a VB.Net backed ASP based report page. By design, if the tables are not present in the database, the relevant data is automatically hidden on the report page. Currently, I'm doing this by checking for the inevitable error, and hiding the div in the catch block. A bit kludgy, but it worked.I can't include the VB code-behind, but the relevant stored procedure is included below.However, a problem with this method was recently brought to my attention when, for no apparent reason, the div was being hidden even though the proper data was available. As it turned out, the user trying to select the table in the dynamic SQL call didn't have the proper select permissions, an easy enough fix once I could track it down.First and foremost - is there a better way to check for a missing table than through catching the error in the VB.Net codebehind? All things considered, I'd rather save the error checking for an actual error. Secondly, is there a preferred method to squirrel out a particular OLE DB error out of the general object caught by the try->catch block other than just checking the actual stack trace string?
SQL Query - The main gist of the code is that, due to the design of the database, I have to determine the name of the actual table being targeted manually. The database records jobs in a single table, but each job also gets its own table for processing data on the items processed in that job, and it's data from those tables I have to retrieve. Absolutely nothing I can do about this setup, unfortunately. [code]
Anyone have any insight on the Big O notation for comparisons for a LINQ Except query using primitive datatypes? I couldn't find anything on google.
View 3 RepliesI am looking for any assistance on the best method to accomplish this task. I need to take a comma delimited text file, load it into memory, and then grab indevidual columns of data and export them to a file.[code]I need to for this project I ma working on grab ALL of COL C for example and export it and the data to that column to a file. Can someone provide me with assistance on the best and easiest method on doing this? I know I can do it with a lot of parse text's and many methods of using a listbox or arrays but I'd like to explore some options.
View 6 RepliesUnder Visual Basic 2010, I am trying to define a specific instance of a static method that was created as a Java class. I have a vendor supplied dll added in as a reference.[code]...
But, I can't seem to define a specific instance of this method. Using "IntegrationMethod.getIntegrationMode()"always returns a value of zero.
There doesn't appear to be any way to "setIntegrationMode" to a specific value.
The documentatoin for this Class as provided by the vendor are shown below.
When I asked the vendor for assistance, their response was: "
Our javadocs for the IntegrationMethod class show that we provide three predefined instances of the IntegrationMethod class[code]...
When running setup to install published program, the following message occurs: System Update Required: Unable to install or run the applicaiton. The application requires that asssembly CrystalDecisions.CrystalReports.Engine Version 10.2.3600.0 be install in the Global Assembly Cache (GAC) first. This version is listed in the references of the program and in my mind, be included in build. How do I get by this error?
View 23 RepliesWhen running setup to install published program, the following message occurs: System Update Required: Unable to install or run the applicaiton. The application requires that asssembly CrystalDecisions.CrystalReports.Engine Version 10.2.3600.0 be install in the Global Assembly Cache (GAC) first. This version is listed in the references of the program and in my mind, be included in build. How do I get by this error?
View 2 RepliesI have recently upgraded an VB6 project to vs2008. I was almost finished when the following error occured. Unable to emit assembly: Referenced assembly AxInterop.MSFlexGridLib does not have a strong name Prior to this error appering, I tested my app several times and it was fine. Only after publishing it did the error appear. I have tried all solutions I could find, but nothing helps. I have read [URL]
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