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Create Extension Method in typescript - String.IsNullOrEmpty()

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How to Create Extension Method using Typescript in Angular Application - String.IsNullOrEmpty() Step 1 : Create typings.d.ts (declaration file) in the application and declare the method in interface like below. HTML interface StringConstructor { isNullOrEmpty(value: string): boolean; } Step 2 : Create extension.ts file in the application and implement the method like below. HTML String.isNullOrEmpty = function (value: string): boolean { return value === undefined || value.trim() === '' || value === null; }; Step 3 : Usage of the Method in the component or class file. HTML import './extensions'; export class TestComponent implements OnInit { public ngOnInit(): void { let abc; console.log(String.isNullOrEmpty(abc)); } } Step 4 : Output like below.
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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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Create Custom Form Control for ng-select in Angular

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How to Create Custom Form Control in Angular  Why we create custom form control ? Normally, we used to create custom form control for re-usability.  The best advantage is that to add common functionality and features in this custom form control and extend the functionality as per our need and requirement.  And we can use everywhere into the application. But this example will tell you how to create custom form control to extend the functionality of  angular ng-select component.  We are adding a feature for this control, multi selection along with checkbox. Before that, we need to know what is the basic syntax of creating custom form control in angular. So, we start by implementing the ControlValueAccessor interface from @angular/forms into the component. This interface has three functions that need to be implemented and one optional functional. writeValue(obj: any): void { } registerOnChange(fn: any): void ...
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