logging in or signing up Dot Net Assemblies varun5.83 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1193 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: March 17, 2010 This Presentation is Public Favorites: 0 Presentation Description How to create private and shared assemblies Comments Posting comment... Premium member Presentation Transcript Introduction to .NET Assemblies : Introduction to .NET Assemblies What is an assembly? : What is an assembly? An Assembly is a logical unit of code Assembly physically exist as DLLs or EXEs One assembly can contain one or more files The constituent files can include any file types like image files, text files etc. along with DLLs or EXEs When you compile your source code by default the exe/dll generated is actually an assembly Unless your code is bundled as assembly it can not be used in any other application When you talk about version of a component you are actually talking about version of the assembly to which the component belongs. Every assembly file contains information about itself. This information is called as Assembly Manifest. What is assembly manifest? : What is assembly manifest? Assembly manifest is a data structure which stores information about an assembly This information is stored within the assembly file(DLL/EXE) itself The information includes version information, list of constituent files etc. What is private and shared assembly? : What is private and shared assembly? The assembly which is used only by a single application is called as private assembly. Suppose you created a DLL which encapsulates your business logic. This DLL will be used by your client application only and not by any other application. In order to run the application properly your DLL must reside in the same folder in which the client application is installed. Thus the assembly is private to your application. Suppose that you are creating a general purpose DLL which provides functionality which will be used by variety of applications. Now, instead of each client application having its own copy of DLL you can place the DLL in 'global assembly cache'. Such assemblies are called as shared assemblies. What is Global Assembly Cache? : What is Global Assembly Cache? Global assembly cache is nothing but a special disk folder where all the shared assemblies will be kept. It is located under <drive>:\WinNT\Assembly folder. How assemblies avoid DLL Hell? : How assemblies avoid DLL Hell? As stated earlier most of the assemblies are private. Hence each client application refers assemblies from its own installation folder. So, even though there are multiple versions of same assembly they will not conflict with each other. Consider following example : You created assembly Assembly1 You also created a client application which uses Assembly1 say Client1 You installed the client in C:\MyApp1 and also placed Assembly1 in this folder After some days you changed Assembly1 You now created another application Client2 which uses this changed Assembly1 You installed Client2 in C:\MyApp2 and also placed changed Assembly1 in this folder Since both the clients are referring to their own versions of Assembly1 everything goes on smoothly How do I create shared assemblies? : How do I create shared assemblies? Following steps are involved in creating shared assemblies : Create your DLL/EXE source code Generate unique assembly name using SN utility Sign your DLL/EXE with the private key by modifying AssemblyInfo file Compile your DLL/EXE Place the resultant DLL/EXE in global assembly cache using AL utility How do I create unique assembly name? : How do I create unique assembly name? Microsoft now uses a public-private key pair to uniquely identify an assembly. These keys are generated using a utility called SN.exe (SN stands for shared name). The most common syntax of is : sn -k mykeyfile.key Where k represents that we want to generate a key and the file name followed is the file in which the keys will be stored. How do I sign my DLL/EXE? : How do I sign my DLL/EXE? Before placing the assembly into shared cache you need to sign it using the keys we just generated. You mention the signing information in a special file called AssemblyInfo. Open the file from VS.NET solution explorer and change it to include following lines : [assembly:AssemblyKeyFile("file_path")] Now recompile the project and the assembly will be signed for you. Note : You can also supply the key file information during command line compilation via /a.keyfile switch. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Dot Net Assemblies varun5.83 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1193 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: March 17, 2010 This Presentation is Public Favorites: 0 Presentation Description How to create private and shared assemblies Comments Posting comment... Premium member Presentation Transcript Introduction to .NET Assemblies : Introduction to .NET Assemblies What is an assembly? : What is an assembly? An Assembly is a logical unit of code Assembly physically exist as DLLs or EXEs One assembly can contain one or more files The constituent files can include any file types like image files, text files etc. along with DLLs or EXEs When you compile your source code by default the exe/dll generated is actually an assembly Unless your code is bundled as assembly it can not be used in any other application When you talk about version of a component you are actually talking about version of the assembly to which the component belongs. Every assembly file contains information about itself. This information is called as Assembly Manifest. What is assembly manifest? : What is assembly manifest? Assembly manifest is a data structure which stores information about an assembly This information is stored within the assembly file(DLL/EXE) itself The information includes version information, list of constituent files etc. What is private and shared assembly? : What is private and shared assembly? The assembly which is used only by a single application is called as private assembly. Suppose you created a DLL which encapsulates your business logic. This DLL will be used by your client application only and not by any other application. In order to run the application properly your DLL must reside in the same folder in which the client application is installed. Thus the assembly is private to your application. Suppose that you are creating a general purpose DLL which provides functionality which will be used by variety of applications. Now, instead of each client application having its own copy of DLL you can place the DLL in 'global assembly cache'. Such assemblies are called as shared assemblies. What is Global Assembly Cache? : What is Global Assembly Cache? Global assembly cache is nothing but a special disk folder where all the shared assemblies will be kept. It is located under <drive>:\WinNT\Assembly folder. How assemblies avoid DLL Hell? : How assemblies avoid DLL Hell? As stated earlier most of the assemblies are private. Hence each client application refers assemblies from its own installation folder. So, even though there are multiple versions of same assembly they will not conflict with each other. Consider following example : You created assembly Assembly1 You also created a client application which uses Assembly1 say Client1 You installed the client in C:\MyApp1 and also placed Assembly1 in this folder After some days you changed Assembly1 You now created another application Client2 which uses this changed Assembly1 You installed Client2 in C:\MyApp2 and also placed changed Assembly1 in this folder Since both the clients are referring to their own versions of Assembly1 everything goes on smoothly How do I create shared assemblies? : How do I create shared assemblies? Following steps are involved in creating shared assemblies : Create your DLL/EXE source code Generate unique assembly name using SN utility Sign your DLL/EXE with the private key by modifying AssemblyInfo file Compile your DLL/EXE Place the resultant DLL/EXE in global assembly cache using AL utility How do I create unique assembly name? : How do I create unique assembly name? Microsoft now uses a public-private key pair to uniquely identify an assembly. These keys are generated using a utility called SN.exe (SN stands for shared name). The most common syntax of is : sn -k mykeyfile.key Where k represents that we want to generate a key and the file name followed is the file in which the keys will be stored. How do I sign my DLL/EXE? : How do I sign my DLL/EXE? Before placing the assembly into shared cache you need to sign it using the keys we just generated. You mention the signing information in a special file called AssemblyInfo. Open the file from VS.NET solution explorer and change it to include following lines : [assembly:AssemblyKeyFile("file_path")] Now recompile the project and the assembly will be signed for you. Note : You can also supply the key file information during command line compilation via /a.keyfile switch.