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Map Operator in RxJs

The map operator in RxJS is used to transform the emissions of an Observable stream. It applies a function to each emitted value and returns a new Observable with the transformed values. The original values are not modified. The map operator is often used in combination with other operators to create complex data flows. Advantages of the map operator in RxJS include: Transformation of data : The map operator allows you to transform the data emitted by an Observable, which can be very useful for manipulating the data in the way you need it. Efficiency : The map operator is an efficient way to modify data, as it does not modify the original data and creates a new Observable with the transformed data. Composability : The map operator is a composable operator, which means you can combine it with other operators to create more complex data flows. Clarity : Using the map ope...
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Delete Empty Rows or Null Rows in Datatable in C#

How to Delete Empty Rows or Null Rows in Datatable Example:  In this application we can see how to Delete Empty Rows or Null Rows in Datatable. Mostly this issue comes from while uploading the excel(.xls,.xlsx) file data into your sql table through datatable in windows application or web application. In rare cases,we can see while getting data from excel to datatable it will copies the empty rows also. Below Code. C# public DataTable DeleteEmptyRowsFromDataTable(DataTable dt) { for (int i = dt.Rows.Count - 1; i >= 0; i--) { if (dt.Rows[i][1] == DBNull.Value) dt.Rows[i].Delete(); } dt.AcceptChanges(); return dt; }
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Create function to convert from string to Integer using javascript

Create a function to convert a string to integer using JavaScript. Javascript function parseStringToInteger(inputValue: string): Number { let value: number; if (inputValue === '0' || Number(inputValue) === 0) { value = 0; } else if (inputValue === '') { value = null; } else { value = Number(inputValue); } return value; } How to use the above function to get the expected result :  Javascript const value = parseStringToInteger("25"); console.log(value); Output : 25
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Create a function to convert from string to Decimal using JavaScript

Create a function to convert a string to decimal using JavaScript. Javascript function parseStringToDecimal(inputValue: string): Number { let value: number; if (inputValue === '0.00' || Number(inputValue) === 0.00) { value = 0.00; } else if (inputValue === '') { value = null; } else { value = parseFloat(inputValue.toString().replace(/,/, '')); } return value; } Expected Result :  Example const value = parseStringToDecimal("1,000.256"); console.log(value); Output :  1000.256
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Angular CLI Commands - Cheat Sheet

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Angular CLI (Command Line Interface) is one of the powerful tool that allows you to perform a lot of actions in an Angular project by using simple commands. We can use the CLI tool directly in a command shell, or indirectly through an interactive UI such as Angular Console.  The Best Advantage is that, can avoid manual process to create lot of stuff like create components, directives, feature modules, services... etc.  It automatically recompiles the source code files and refreshes the app in the browser.  Let's see, how to install CLI tool and what are those CLI commands. Installing the CLI is very quite easy. All we need to do, is to run the below command in Terminal or Console. It will install the CLI tool globally with respective version. Here we need to know two things before installing the CLI tool. We can install latest version or any version released by angular team based on your project need. Check the Versions list.✋ Angular CLI Setup  1. Globally - To ins...
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Restrict Special Characters in Windows Application using c#

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Example : In this application it will remove all the special characters when we trying to copy paste the special characters. Lets see how it is possible with Copy,paste. Please follow these steps : 1. Create a New Windows Form with the name of 'Form1', and take one label with the name of 'lblName' and one textbox with the name of 'txtName' and one button with the name of 'btnValidate'. Please see below image. 2. Add a code in TextChanged event for that textbox. Here my textbox name is 'txtName' in that I have added a event like . private void txtName_TextChanged(object sender, EventArgs e) {       txtName.Text = RemoveSpecialCharacters(txtName.Text); } 3. In that event you observed method name of 'RemoveSpecialCharacters'.Basically it will remove all the special characters when you are copy paste in to the textbox.       private string RemoveSpecialCharacters(String inString)       ...
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Content Negotiation in Web API with example

Content negotiation in Web API C# refers to the process of determining the best format for data exchange between the client and the server. It allows the client to specify the format they prefer to receive data in, and the server will send the data in that format if it's available. In Web API C#, content negotiation is done through the use of media formatters. A media formatter is responsible for serializing and deserializing the data in a specific format, such as JSON, XML, or plain text. The process of content negotiation in Web API C# involves the following steps: The client sends a request to the server and specifies the media type it prefers to receive the response in, through the Accept header in the HTTP request. The server receives the request and examines the Accept header to determine the media type requested by the client. The server then looks for a media formatter that can serialize the response in th...
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Send API POST Request in MS SQL Server

To send an API POST request in MS SQL Server using multipart/form-data, you can use the following T-SQL code: Example of content type : multipart/form-data SQL DECLARE @url VARCHAR(200) = 'https://example.com/api'; DECLARE @boundary VARCHAR(50) = '---------------------------' + CAST(NEWID() AS VARCHAR(36)); DECLARE @param1Name VARCHAR(50) = 'name'; DECLARE @param1Value VARCHAR(50) = 'John Doe'; DECLARE @param2Name VARCHAR(50) = 'email'; DECLARE @param2Value VARCHAR(50) = 'johndoe@example.com'; DECLARE @param3Name VARCHAR(50) = 'file'; DECLARE @param3Value VARBINARY(MAX) = (SELECT BulkColumn FROM OPENROWSET(BULK 'C:\path\to\file.txt', SINGLE_BLOB) AS x); DECLARE @param4Name VARCHAR(50) = 'description'; DECLARE @param4Value VARCHAR(200) = 'This is a sample file'; DECLARE @formData NVARCHAR(MAX) = N'--' + @boundary + CHAR(13) + CHAR(10) + ...
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Implementing DIP (Dependency Inversion Principle) in .NET Core project

Dependency Inversion Principle (DIP) is one of the SOLID principles that states that high-level modules should not depend on low-level modules, instead both should depend on abstractions. In .NET Core, we can implement DIP using various techniques such as Dependency Injection, Inversion of Control (IoC), and Service Locator. Here's a simple example of how to implement DIP using Dependency Injection in a .NET Core project: By following below steps, we can implement DIP in our .NET Core project using Dependency Injection. 1. Define interfaces for the low-level modules (dependencies) that the high-level module needs to use. For example: public interface ILogger {     void Log( string message); } public interface IDataProvider {     string GetData(); } 2. Create implementations for these interfaces.  For example: public class FileLogger : ILogger {     public void Log( string message)     {         // cod...
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Angular Coding Styles and Standards - PART 1

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Coding Styles is very important to every application. It tells how the application is clean and neat.  Every programming language has common coding styles and standards. We must follow the few of the coding styles it will very helpful to application development. Then the code will easier to understand. In this post, listed few of the angular coding styles and standards with small examples. 1. Per file, the code should limit to 400 lines. import  {  Component  }  from   '@angular/core' ; @ Component ({    selector :   'app-root' ,    templateUrl :   './app.component.html' ,    styleUrls :  [ './app.component.scss' ] }) export   class   AppComponent  {    // Per file, the code should limit to 400 lines. } 2.  Per function, the code should limit to 75 lines. public   displayUserInformationToTable ():  void  {   //...
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