C# Response files

Response files are similar to batch files, having some specific instruction. On execution they perform some predefined task based on instruction. Response file contains instruction to compile programs.

If we have to build complex program through command line then response files are really helpful in development process. rsp is an extension for response files. By default, csc.rsp file exists under "Framework" folder Ex: C:\Windows\Microsoft.NET\Framework\v4.0.30319. csc.rsp contains long list of system references (dlls).
Some contents under csc.rsp
# Reference the common Framework libraries
/r:Accessibility.dll
/r:Microsoft.CSharp.dll
/r:System.Configuration.dll
/r:System.Configuration.Install.dll
/r:System.Core.dll
/r:System.Data.dll
/r:System.Data.DataSetExtensions.dll
/r:System.Data.Linq.dll
..........

In same way we can have our own response file defined which might include some third party dll. Let's see an example.

Suppose we have to create an application which uses windows form and library named Sample.Test.
Texts under test.rsp file:

# External assembly references.
/r:System.Windows.Forms.dll
/r:Sample.Test

# File generation instructions
/target:exe /out:Test.exe *.cs

# symbol is used for comments. We have added two library with /r parameter. *.cs will include all files under that library.

Now for compilation we just need to execute csc @test.rsp

Comments

Making FluentValidation compatible with Swagger including Enum or fixed List support

FluentValidation is not directly compatible with Swagger API to validate models. But they do provide an interface through which we can compose Swagger validation manually. That means we look under FluentValidation validators and compose Swagger validator properties to make it compatible. More of all mapping by reading information from FluentValidation and setting it to Swagger Model Schema. These can be done on any custom validation from FluentValidation too just that proper schema property has to be available from Swagger. Custom validation from Enum/List values on FluentValidation using FluentValidation.Validators; using System.Collections.Generic; using System.Linq; using static System.String; /// <summary> /// Validator as per list of items. /// </summary> /// <seealso cref="PropertyValidator" /> public class FixedListValidator : PropertyValidator { /// <summary> /// Gets the valid items /// <...

main method return value

Mainly we used to write "static void main" for entry point in console application. Placement of void denotes return type. In main function we could have "int" too but what does it really mean. "int main" signifies return type as integer. The return type of main function tells about execution status of application. Even if we have specified void as return type then it would be marked as successful program execution. If we mark int as return type then we are able to control the execution status. Now, what is the benefit of making main function as int. Windows OS saves result in %ERRORLEVEL% environment variable of OS. If we create batch file and execute application through it then we will able to get status and based on result we can trigger something else through batch file. Let's suppose we have created program called TEST.EXE. Batch file script: @echo off REM Execute main program REM TEST.EXE @if "%ERRORLEVEL%" == "0...

Getting started with Raspberry Pi

Raspberry Pi is a small, low powered motherboard contains 512 RAM, combined CPU and GPU. It has LAN, 2 USB, HDMI input, Audio Out, SD Card reader and S-Video connectors. We can have many Linux distribution OS on it. To configure, we just need to attach SD Card to it. SD Card could range from class 4 to class 10. In some cases Raspberry Pi could support less then class 4 cards too. It could be powered through mini USB mobile charger. Let's get started with installing OS on SD Card. There are various ways to install OS. Like we can download OSes through http://www.raspberrypi.org/downloads and follow the instructions given on it. There is something BerryBoot multi-boot loader through which we can have more then one OS on Raspberry Pi and boot OS according to our need. http://www.berryterminal.com/doku.php/berryboot instructions could be followed to install OS with very simple steps. You need to have internet connection on Raspberry Pi to install OS. It coul...

Kendo MVC Grid DataSourceRequest with AutoMapper

Kendo Grid does not work directly with AutoMapper but could be managed by simple trick using mapping through ToDataSourceResult. The solution works fine until different filters are applied. The problems occurs because passed filters refer to view model properties where as database model properties are required after AutoMapper is implemented. So, the plan is to intercept DataSourceRequest and modify names based on database model. To do that we are going to create implementation of CustomModelBinderAttribute to catch calls and have our own implementation of DataSourceRequestAttribute from Kendo MVC. I will be using same source code from Kendo but will replace column names for different criteria for sort, filters, group etc. Let's first look into how that will be implemented. public ActionResult GetRoles([MyDataSourceRequest(GridId.RolesUserGrid)] DataSourceRequest request) { if (request == null) { throw new Argume...

Trim text in MVC Core through Model Binder

Trimming text can be done on client side codes, but I believe it is most suitable on MVC Model Binder since it would be at one place on infrastructure level which would be free from any manual intervention of developer. This would allow every post request to be processed and converted to a trimmed string. Let us start by creating Model binder using Microsoft.AspNetCore.Mvc.ModelBinding; using System; using System.Threading.Tasks; public class TrimmingModelBinder : IModelBinder { private readonly IModelBinder FallbackBinder; public TrimmingModelBinder(IModelBinder fallbackBinder) { FallbackBinder = fallbackBinder ?? throw new ArgumentNullException(nameof(fallbackBinder)); } public Task BindModelAsync(ModelBindingContext bindingContext) { if (bindingContext == null) { throw new ArgumentNullException(nameof(bindingContext)); } var valueProviderResult = bindingContext.ValueProvider.GetValue(bin...

Implementing/Automating audit logs in Telerik Data Access

Audit logs can be tedious task if done manually, also developer might miss to update audit log implementation on certain level. The codes would be repeated on all places if not centralized. There are many approach available to maintain change history of model/table. Like having single history table and manage all changes of all models in same table. We may maintain in same table with some flags and JSON data for change list. We will look for maintaining history table based on each required data models with minimum effort and performance. To reduce code, I am going to use T4 to generate history models automatically based on original model. Also we are going to take care of Artificial type values. Step 1 - Create a custom attribute to mark model that history need to be maintained. /// <summary> /// Attribute to maintain history table /// </summary> [AttributeUsage(AttributeTargets.Class)] public class ManageHistoryAttribute : Attribute ...

Voice control Sony Bravia Television through Alexa

This is my second useful thing done through Alexa after simple implementation of switching on/off light. This is not just applicable to Sony Bravia TVs but any device which can be controlled through HTTP/JSON request or via any other protocol. Hardware prerequisites for making whole thing work are as follows: 1. Sony Bravia Android TV or other devices which can accept input through HTTP or different protocol. 2. Raspberry Pi to keep running program/service. 3. Alexa device. Software prerequisites: 1. Alexa Skill: https://developer.amazon.com/edw/home.html#/skills 2. Lambda: https://console.aws.amazon.com/lambda/home?region=us-east-1#/functions 3. AWS IoT: https://console.aws.amazon.com/iot/home?region=us-east-1 How the whole process would work? Alexa would accept voice commands and converts it to intend to make a request to Lambda function. Lambda function would use converted user-friendly commands to MQTT request on AWS IoT service which would be listened through MQTT ...

A wrapper implementation for Kendo Grid usage

A wrapper implementation for any heavily used item is always a good practice. Whatever is not written by us and used at a lot of places should be wrapped within specific functionality to keep it future proof and easily changeable. This also encourages DRY principle to keep our common setting at a central place. Kendo UI items are enormous in configuration, one of an issue I find people keep repeating codes for Kendo Grid configuration. They have built very flexible system to have any configuration, but in most of the cases, we do not need all of those complicated configuration. We would try to see a simpler configuration of same. The actual core implementation is bit complex, but we do not have to bother about it once done since the focus is just on usage only. I recommend doing this practice for as simple as jQuery events, form handling or as simple as any notification system. This just won't make things simple but makes codes much more manageable, easy understand, read or open f...

LDAP with ASP.Net Identity Core in MVC with project.json

Lightweight Directory Access Protocol (LDAP), the name itself explain it. An application protocol used over an IP network to access the distributed directory information service. The first and foremost thing is to add references for consuming LDAP. This has to be done by adding reference from Global Assembly Cache (GAC) into project.json "frameworks": { "net461": { "frameworkAssemblies": { "System.DirectoryServices": "4.0.0.0", "System.DirectoryServices.AccountManagement": "4.0.0.0" } } }, These System.DirectoryServices and System.DirectoryServices.AccountManagement references are used to consume LDAP functionality. It is always better to have an abstraction for irrelevant items in consuming part. For an example, the application does not need to know about PrincipalContext or any other dependent items from those two references to make it extensible. So, we can begin wi...

Tech learning

Search This Blog