I'm writting a custom assembly to be referenced in a report. I'd like to be able to access the Report object from that assembly, so that I could then access the report parameters and other stuff that I can access in custom RDL code by using Report.stuff.
I obviously need to reference some reporting services assembly to do this, yet I can't figure out which. I tried Microsoft.ReportingServices.ProcessingCore, since it has a class Report with various properties like Parameters etc., but when I tried to pass the Report object from the RDL custom code section to my class, I got this error:
Unable to cast object of type 'ReportExprHostImpl' to type 'Microsoft.ReportingServices.ReportRendering.Report'.
There's also an assembly which exposes various interfaces and an abstract class Report, but it doesn't seem to have the parameters as a property.
So the question is, how could I achieve this, what assembly do I have to reference ? And if possible, can I access the Report object without passing it from the RDL, i.e. so that I could just register an instance of my class and later write expressions like:
=Utils.DoStuffWhileReferencingReportParameters(Fields!field.Value)
Reference these two dlls in your library:
Microsoft.ReportingServices.ProcessingCore
Microsoft.ReportingServices.ProcessingObjectModel
Put the following code in your library (as an example)
using Microsoft.ReportingServices.ReportProcessing.ReportObjectModel;
public static string Test(Parameters item)
{
return item ["my_parameter_name"].Value.ToString();
}
Here’s an example expression to use in your RDL file:
=MyNameSpace.MyStaticClass.Test(Parameters)
Related
Sometimes in debug mode with Flash Builder, I see something like
__AS3__.vec.Vector.<Object> (#909e219)
but when I try to store this variable in another as3 variable, Flash duplicate this variable. Concretly, I'm trying to exclude some values on dragInitiator.selectedItems property before adding them to a List but when I use splice method on it, values aren't deleted from this vector.
So how can I acces variable with __AS3__ namespace please ?
According to a Tamarin developer:
The namespace "__AS3__.vec" is an artifact of a time when we did not have good API
versioning and could not introduce new top-level names without the risk of breaking
existing code. Today we would probably have made "Vector" public & versioned.
Source: http://hg.mozilla.org/tamarin-redux/rev/817f3e019ba2#l2.30
In other words, __AS3__ is the package where are defined Flash internal classes into Tamarin VM.
To access such variables, you don't need to specify the namespace. You only have to use the FQN declared in playerglobals.swc.
Windows Phone 8 C# project (MyApp), migrated from WP7.1. I've added a native Windows Runtime component library (AppLib) to the solution, created a reference. There's a public sealed ref class (MyClass) in it. There's a reference to it in the C# code (in OnLoaded of the main XAML page). The whole thing compiles - meaning the metadata of the component is being generated.
When I'm trying to run, the project fails with the exception or type TypeLoadException with the following message:
Typename or Namespace was not found in metadata file. (Exception from HRESULT: 0x8000000F)
Both AppLib.DLL and AppLib.winmd can be found in the XAP. The winmd contains the information about the type, and in the right namespace, too. What else should I check?
At exception time, the AppLib.dll is not listed in the modules window of the debugger. It's as if the DLL loading fails for some reason.
I've tried with brand new class in an arbitrary namespace - same problem. Looks like the problem is on the DLL level, not on class level.
The name of the WinMD file must be a prefix of the name of the namespace in which any public and activatable types are declared. For example, if your WinMD is named AppLib.winmd, your MyClass type must be defined in namespace AppLib or some other namespace nested within that namespace, for example AppLib::Something.
It must also be declared in the "best matching" WinMD, so if your type is named A.B.MyClass and you have both A.winmd and A.B.winmd in your package, the type must be defined in A.B.winmd.
The Windows Runtime uses the name of the type to determine which WinMD file defines the type. See also my answer to "XAML cannot find reference in local namespace."
I am looking for some help with designing some functionality in my application. I already have something similar designed but this problem is a little different.
Background:
In my application we have different Modules. Data in each module can be associated to other modules. Each Module is represented by an Object in our application.
Module 1 can be associated with Module 2 and Module 3. Currently I use a factory to provide the proper DAO for getting and saving this data.
It looks something like this:
class Module1Factory {
public static Module1BridgeDAO createModule1BridgeDAO(int moduleid) {
switch (moduleId)
{
case Module.Module2Id: return new Module1_Module2DAO();
case Module.Module3Id: return new Module1_Module3DAO();
default: return null;
}
}
}
Module1_Module2 and Module1_Module3 implement the same BridgeModule interface. In the database I have a Table for every module (Module1, Module2, Module3). I also have a bridge table for each module (they are many to many) Module1_Module2, Module1_Module3 etc.
The DAO basically handles all code needed to manage the association and retrieve its own instance data for the calling module. Now when we add new modules that associate with Module1 we simply implement the ModuleBridge interface and provide the common functionality.
New Development
We are adding a new module that will have the ability to be associated with other Modules as well as specific properties of that module. The module is basically providing the user the ability to add their custom forms to our other modules. That way they can collect additional information along with what we provide.
I want to start associating my Form module with other modules and their properties. Ie if Module1 has a property Category, I want to associate an instance From data with that property.
There are many Forms. If a users creates an instance of Module2, they may always want to also have certain form(s) attached to that Module2 instance. If they create an instance of Module2 and select Category 1, then I may want additional Form(s) created.
I prototyped something like this:
Form
FormLayout (contains the labels and gui controls)
FormModule (associates a form with all instances of a module)
Form Instance (create an instance of a form to be filled out)
As I thought about it I was thinking about making a new FormModule table/class/dao for each Module and Property that I add. So I might have:
FormModule1
FormModule1Property1
FormModule1Property2
FormModule1Property3
FormModule1Property4
FormModule2
FormModule3
FormModule3Property1
Then as I did previously, I would use a factory to get the proper DAO for dealing with all of these. I would hand it an array of ids representing different modules and properties and it would return all of the DAOs that I need to call getForms(). Which in turn would return all of the forms for that particular bridge.
Some points
This will be for a new module so I dont need to expand on the factory code I provided. I just wanted to show an example of what I have done in the past.
The new module can be associated with: Other Modules (ie globally for any instance of that module data), Other module properties (ie only if the Module instance has a certian value in one of its properties)
I want to make it easy for developers to add associations with other modules and properties easily
Can any one suggest any design patterns or strategy's for achieving this?
If anything is unclear please let me know.
Thank you,
Al
You can use springs Dependency Injection feature. This would help you achieve the flexibility of instantiating the objects using an xml configuration file.
So, my suggestion would be go with the Springs.
I'm trying to use a custom assembly in Report Builder 2.0. I have added the assembly to the report via Report Properties > References. When I try to call a public static method in the assembly, I get this message:
'ExtractTag' is not a member of 'ReportsClassLibrary.ReportsClassLibraryTools'.
The expression I'm trying to use to call the method is:
=ReportsClassLibrary.ReportsClassLibraryTools.ExtractTag("ID", "ID:incorrect", false)
And the method signature in the assembly is:
public static string ExtractTag(string tagToFind, string tags, bool caseSensitive)
That method is within the ReportsClassLibrary namespace and in the ReportsClassLibraryTools class.
I don't know if for some reason my report is looking an older version of the assembly that did not have this method, or if the problem is something else. I've tried removing the assembly from the report, rebuilding the assembly, and re-adding it to the report.
Edit: looks like a deeper problem. My assembly compiles, but when running a test case that calls that method, the test fails with a System.MissingMethodException. Guess I'm having an assembly problem, not a Report Builder problem...
Turned out it was a problem with the Global Assembly Cache in Vista. The old version of my assembly was cached, so the new method ExtractTag wasn't part of the assembly. I had to run:
"C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin\gacutil.exe" /i bin\Debug\ReportsClassLibrary.dll
My good friend, Wikipedia, didn't give me a very good response to that question. So:
What are language bindings?
How do they work?
Specifically accessing functions from code written in language X of a library written in language Y.
Let's say you create a C library to post stuff to stackoverflow. Now you want to be able to use the same library from Python. In this case, you will write Python bindings for your library.
Also see SWIG: http://www.swig.org
In the context of code libraries, bindings are wrapper libraries that bridge between two programming languages so that a library that was written for one language can also be implicitly used in another language.
For example, libsvn is the API for Subversion and was written in C. If you want to access Subversion from within Java code you can use libsvn-java. libsvn-java depends on libsvn being installed because libsvn-java is a mere bridge between the Java programming language and libsvn, providing an API that merely calls functions of libsvn to do the real work.
Okay, now the question has been clarified, this isn't really relevant so I'm moving it to a new question
Binding generally refers to a mapping of one thing to another - i.e. a datasource to a presentation object. It can typically refer to binding data from a database, or similar source (XML file, web service etc) to a presentation control or element - think list or table in HTML, combo box or data grid in desktop software.
...If that's the kind of binding you're interested in, read on...
You generally have to bind the presentation element to the datasource, not the other way around. This would involve some kind of mapping - i.e. which fields from the datasource do you want to appear in the output.
For more information in a couple of environments see:
Data binding in .Net using Windows Forms
http://www.codeproject.com/KB/database/databindingconcepts.aspx
http://www.akadia.com/services/dotnet_databinding.html
ASP.NET data binding
http://support.microsoft.com/kb/307860
http://www.15seconds.com/issue/040630.htm
http://www.w3schools.com/ASPNET/aspnet_databinding.asp
Java data binding
http://www.xml.com/pub/a/2003/09/03/binding.html
Python data binding
http://www.xml.com/pub/a/2005/07/27/py-xml.html
General XML data binding
http://www.rpbourret.com/xml/XMLDataBinding.htm
In Flex (Actionscript 3). Source
A data binding copies the value of a property in one object to a property in another object. You can bind the properties of following objects: Flex components, Flex data models, and Flex data services.
The object property that provides the data is known as the source property. The object property that receives the data is known as the destination property.
The following example binds the text property of a TextInput component (the source property) to the text property of a Label component (the destination property) so that text entered in the TextInput component is displayed by the Label component:
<mx:TextInput id="LNameInput"></mx:TextInput>
...
<mx:Label text="{LNameInput.text}"></mx:Label>
Data binding is usually a simple way to bind a model to user interface components. For example, you have a class with a FirstName property. In flex you could easily bind that property to a textbox by setting the value of the textbox to {Object.FirstName}. Then, every time that FirstName property changes, the textbox will be updated without requiring you to write any code to monitor that property for changes.
Hope that helps.
Matt