Utilizar la API web de Microsoft Dataverse en un componente de Power Apps
Una situación común durante el desarrollo de componentes es la necesidad de interactuar con Microsoft Dataverse subyacente en su solución. Power Apps Component Framework muestra una característica de API web que permite cumplir este requisito. Este ejemplo mostrará cómo realizar varias operaciones CRUD con esta característica.
Nota
La característica API web solo se admite en aplicaciones basadas en modelo.
Inicializar su proyecto de componente
Para inicializar el proyecto de componente, siga estos pasos:
Inicie Visual Studio Code.
Seleccione Terminal y, luego, Nuevo terminal.
Cambie el directorio a su carpeta de origen.
cd sourceDesde el directorio de origen, cree un directorio llamado TS-Web-API.
md TS-Web-APIEjecute el siguiente comando para cambiar al directorio nuevo.
cd TS-Web-APIInicialice el proyecto ejecutando el comando siguiente.
pac pcf init --namespace SampleNamespace --name TSWebAPI --template fieldEjecute npm install para cargar bibliotecas dependientes en su proyecto.
npm installAbra el proyecto en Visual Studio Code mediante la ejecución del comando siguiente.
code -a .
Implementar la lógica del componente del código
Para implementar su lógica de componente de código, siga estos pasos:
Expanda la carpeta TSWebAPI y abra el archivo ControlManifest.Input.xml.
Reemplace todo el manifiesto con el siguiente XML.
<?xml version="1.0" encoding="utf-8"?> <manifest> <control namespace="SampleNamespace" constructor="TSWebAPI" version="1.0.0" display-name-key="TS_WebAPI_Display_Key" description-key="TS_WebAPI_Desc_Display_Key" control-type="standard"> <property name="stringProperty" display-name-key="stringProperty_Display_Key" description-key="stringProperty_Desc_Key" of-type="SingleLine.Text" usage="bound" required="true" /> <resources> <code path="index.ts" order="1" /> <css path="css/TS_WebAPI.css" order="2" /> </resources> <feature-usage> <uses-feature name="WebAPI" required="true" /> </feature-usage> </control> </manifest>Puede agregar los archivos de soporte que se encuentran en este manifiesto más adelante.
Abra el archivo index.ts.
Encima del método constructor, inserte las siguientes variables privadas para admitir la representación de su componente.
// Reference to the control container HTMLDivElement // This element contains all elements of our custom control example private _container: HTMLDivElement; // Reference to ComponentFramework Context object private _context: ComponentFramework.Context<IInputs>; // Flag if control view has been rendered private _controlViewRendered: Boolean; // References to button elements that are rendered by example custom control private _createEntity1Button: HTMLButtonElement; private _createEntity2Button: HTMLButtonElement; private _createEntity3Button: HTMLButtonElement; private _deleteRecordButton: HTMLButtonElement; private _fetchXmlRefreshButton: HTMLButtonElement; private _oDataRefreshButton: HTMLButtonElement; // References to div elements that are rendered by the example custom control private _odataStatusContainerDiv: HTMLDivElement; private _resultContainerDiv: HTMLDivElement;Agregue las siguientes variables estáticas privadas sobre el constructor para indicar con qué entidad o campos interactuará en este ejemplo. Si desea probar con diferentes tablas o columnas, puede hacerlo cambiando sus valores respectivos.
// Name of entity to use for example Web API calls that are performed by this control private static _entityName: string = "account"; // Required field on _entityName of type 'single line of text' // Example Web API calls that are performed by the example custom control will set this field for new record creation examples private static _requiredAttributeName: string = "name"; // Value that the _requiredAttributeName field will be set to for new created records private static _requiredAttributeValue: string = "Web API Custom Control (Sample)"; // Name of currency field on _entityName to populate during record create // Example Web API calls that are performed by the example custom control will set and read this field private static _currencyAttributeName: string = "revenue"; // Friendly name of currency field (only used for control UI - no functional impact) private static _currencyAttributeNameFriendlyName: string = "annual revenue";Coloque la siguiente lógica en el método init.
this._context = context; this._controlViewRendered = false; this._container = document.createElement("div"); this._container.classList.add("TSWebAPI_Container"); container.appendChild(this._container);Agregue la siguiente lógica al método updateView.
if (!this._controlViewRendered) { this._controlViewRendered = true; // Render Web API Examples this.renderCreateExample(); this.renderDeleteExample(); this.renderFetchXmlRetrieveMultipleExample(); this.renderODataRetrieveMultipleExample(); // Render result div to display output of Web API calls this.renderResultsDiv();}Agregue los siguientes métodos auxiliares para representar los elementos HTML en su componente tras el método destroy.
/** * Helper method to create HTML button that is used for CreateRecord Web API Example * @param buttonLabel : Label for button * @param buttonId : ID for button * @param buttonValue : Value of button (attribute of button) * @param onClickHandler : onClick event handler to invoke for the button */ private createHTMLButtonElement(buttonLabel: string, buttonId: string, buttonValue: string | null, onClickHandler: (event?: any) => void): HTMLButtonElement { let button: HTMLButtonElement = document.createElement("button"); button.innerHTML = buttonLabel; if (buttonValue) { button.setAttribute("buttonvalue", buttonValue); } button.id = buttonId; button.classList.add("SampleControl_WebAPI_ButtonClass"); button.addEventListener("click", onClickHandler); return button; } /** * Helper method to create HTML Div Element * @param elementClassName : Class name of div element * @param isHeader : True if 'header' div - adds extra class and post-fix to ID for header elements * @param innerText : innerText of Div Element */ private createHTMLDivElement(elementClassName: string, isHeader: Boolean, innerText?: string): HTMLDivElement { let div: HTMLDivElement = document.createElement("div"); if (isHeader) { div.classList.add("SampleControl_WebAPI_Header"); elementClassName += "_header"; } if (innerText) { div.innerText = innerText.toUpperCase(); } div.classList.add(elementClassName); return div; } /** * Renders a 'result container' div element to inject the status of the example Web API calls */ private renderResultsDiv() { // Render header label for result container let resultDivHeader: HTMLDivElement = this.createHTMLDivElement("result_container", true, "Result of last action"); this._container.appendChild(resultDivHeader); // Div elements to populate with the result text this._resultContainerDiv = this.createHTMLDivElement("result_container", false, undefined); this._container.appendChild(this._resultContainerDiv); // Init the result container with a notification that the control was loaded this.updateResultContainerText("Web API sample custom control loaded"); } /** * Helper method to inject HTML into result container div * @param statusHTML : HTML to inject into result container */ private updateResultContainerText(statusHTML: string): void { if (this._resultContainerDiv) { this._resultContainerDiv.innerHTML = statusHTML; } } /** * Helper method to inject error string into result container div after failed Web API call * @param errorResponse : error object from rejected promise */ private updateResultContainerTextWithErrorResponse(errorResponse: any): void { if (this._resultContainerDiv) { // Retrieve the error message from the errorResponse and inject into the result div let errorHTML: string = "Error with Web API call:"; errorHTML += "<br />" errorHTML += errorResponse.message; this._resultContainerDiv.innerHTML = errorHTML; } } /** * Helper method to generate Label for Create Buttons * @param entityNumber : value to set _currencyAttributeNameFriendlyName field to for this button */ private getCreateRecordButtonLabel(entityNumber: string): string { return "Create record with " + TSWebAPI._currencyAttributeNameFriendlyName + " of " + entityNumber; } /** * Helper method to generate ID for Create button * @param entityNumber : value to set _currencyAttributeNameFriendlyName field to for this button */ private getCreateButtonId(entityNumber: string): string { return "create_button_" + entityNumber; }Agregue los siguientes controladores de eventos onClick para activar las diferentes operaciones CRUD tras los métodos auxiliares.
/** * Event Handler for onClick of create record button * @param event : click event */ private createButtonOnClickHandler(event: Event): void { // Retrieve the value to set the currency field to from the button's attribute let currencyAttributeValue: Number = parseInt( (event.srcElement! as Element)!.attributes.getNamedItem("buttonvalue")!.value ); // Generate unique record name by appending timestamp to _requiredAttributeValue let recordName: string = TSWebAPI._requiredAttributeValue + "_" + Date.now(); // Set the values for the attributes we want to set on the new record // If you want to set additional attributes on the new record, add to data dictionary as key/value pair var data: any = {}; data[TSWebAPI._requiredAttributeName] = recordName; data[TSWebAPI._currencyAttributeName] = currencyAttributeValue; // store reference to 'this' so it can be used in the callback method var thisRef = this; // Invoke the Web API to create the new record this._context.webAPI.createRecord(TSWebAPI._entityName, data).then( function (response: ComponentFramework.LookupValue) { // Callback method for successful creation of new record // Get the ID of the new record created let id: string = response.id; // Generate HTML to inject into the result div to showcase the fields and values of the new record that is created let resultHtml: string = "Created new " + TSWebAPI._entityName + " record with below values:" resultHtml += "<br />"; resultHtml += "<br />"; resultHtml += "id: " + id; resultHtml += "<br />"; resultHtml += "<br />"; resultHtml += TSWebAPI._requiredAttributeName + ": " + recordName; resultHtml += "<br />"; resultHtml += "<br />"; resultHtml += TSWebAPI._currencyAttributeName + ": " + currencyAttributeValue; thisRef.updateResultContainerText(resultHtml); }, function (errorResponse: any) { // Error handling code here - record failed to be created thisRef.updateResultContainerTextWithErrorResponse(errorResponse); } ); } /** * Event Handler for onClick of delete record button * @param event : click event */ private deleteButtonOnClickHandler(): void { // Invoke a lookup dialog to allow the user to select an existing record of type _entityName to delete var lookUpOptions: any = { entityTypes: [TSWebAPI._entityName] }; // store reference to 'this' so it can be used in the callback method var thisRef = this; var lookUpPromise: any = this._context.utils.lookupObjects(lookUpOptions); lookUpPromise.then( // Callback method - invoked after user has selected an item from the lookup dialog // Data parameter is the item selected in the lookup dialog (data: ComponentFramework.EntityReference[]) => { if (data && data[0]) { // Get the ID and entityType of the record that was selected by the lookup let id: string = data[0].id.guid; let entityType: string = data[0].etn!; // Invoke the deleteRecord method of the WebAPI to delete the selected record this._context.webAPI.deleteRecord(entityType, id).then( function (response: ComponentFramework.LookupValue) { // Record was deleted successfully let responseId: string = response.id; let responseEntityType: string = response.name!; // Generate HTML to inject into the result div to showcase the deleted record thisRef.updateResultContainerText("Deleted " + responseEntityType + " record with ID: " + responseId); }, function (errorResponse: any) { // Error handling code here thisRef.updateResultContainerTextWithErrorResponse(errorResponse); } ); } }, (error: any) => { // Error handling code here thisRef.updateResultContainerTextWithErrorResponse(error); } ); } /** * Event Handler for onClick of calculate average value button * @param event : click event */ private calculateAverageButtonOnClickHandler(): void { // Build FetchXML to retrieve the average value of _currencyAttributeName field for all _entityName records // Add a filter to only aggregate on records that have _currencyAttributeName not set to null let fetchXML: string = "<fetch distinct='false' mapping='logical' aggregate='true'>"; fetchXML += "<entity name='" + TSWebAPI._entityName + "'>"; fetchXML += "<attribute name='" + TSWebAPI._currencyAttributeName + "' aggregate='avg' alias='average_val' />"; fetchXML += "<filter>"; fetchXML += "<condition attribute='" + TSWebAPI._currencyAttributeName + "' operator='not-null' />"; fetchXML += "</filter>"; fetchXML += "</entity>"; fetchXML += "</fetch>"; // store reference to 'this' so it can be used in the callback method var thisRef = this; // Invoke the Web API RetrieveMultipleRecords method to calculate the aggregate value this._context.webAPI.retrieveMultipleRecords(TSWebAPI._entityName, "?fetchXml=" + fetchXML).then( function (response: ComponentFramework.WebApi.RetrieveMultipleResponse) { // Retrieve multiple completed successfully -- retrieve the averageValue let averageVal: Number = response.entities[0].average_val; // Generate HTML to inject into the result div to showcase the result of the RetrieveMultiple Web API call let resultHTML: string = "Average value of " + TSWebAPI._currencyAttributeNameFriendlyName + " attribute for all " + TSWebAPI._entityName + " records: " + averageVal; thisRef.updateResultContainerText(resultHTML); }, function (errorResponse: any) { // Error handling code here thisRef.updateResultContainerTextWithErrorResponse(errorResponse); } ); } /** * Event Handler for onClick of calculate record count button * @param event : click event */ private refreshRecordCountButtonOnClickHandler(): void { // Generate OData query string to retrieve the _currencyAttributeName field for all _entityName records // Add a filter to only retrieve records with _requiredAttributeName field which contains _requiredAttributeValue let queryString: string = "?$select=" + TSWebAPI._currencyAttributeName + "&$filter=contains(" + TSWebAPI._requiredAttributeName + ",'" + TSWebAPI._requiredAttributeValue + "')"; // store reference to 'this' so it can be used in the callback method var thisRef = this; // Invoke the Web API Retrieve Multiple call this._context.webAPI.retrieveMultipleRecords(TSWebAPI._entityName, queryString).then( function (response: any) { // Retrieve Multiple Web API call completed successfully let count1: number = 0; let count2: number = 0; let count3: number = 0; // Loop through each returned record for (let entity of response.entities) { // Retrieve the value of _currencyAttributeName field let value: Number = entity[TSWebAPI._currencyAttributeName]; // Check the value of _currencyAttributeName field and increment the correct counter if (value == 100) { count1++; } else if (value == 200) { count2++; } else if (value == 300) { count3++; } } // Generate HTML to inject into the fetch xml status div to showcase the results of the OData retrieve example let innerHtml: string = "Use above buttons to create or delete a record to see count update"; innerHtml += "<br />"; innerHtml += "<br />"; innerHtml += "Count of " + TSWebAPI._entityName + " records with " + TSWebAPI._currencyAttributeName + " of 100: " + count1; innerHtml += "<br />"; innerHtml += "Count of " + TSWebAPI._entityName + " records with " + TSWebAPI._currencyAttributeName + " of 200: " + count2; innerHtml += "<br />"; innerHtml += "Count of " + TSWebAPI._entityName + " records with " + TSWebAPI._currencyAttributeName + " of 300: " + count3; // Inject the HTML into the fetch xml status div if (thisRef._odataStatusContainerDiv) { thisRef._odataStatusContainerDiv.innerHTML = innerHtml; } // Inject a success message into the result div thisRef.updateResultContainerText("Record count refreshed"); }, function (errorResponse: any) { // Error handling code here thisRef.updateResultContainerTextWithErrorResponse(errorResponse); } ); }Agregue los siguientes métodos auxiliares para representar los resultados de sus operaciones CRUD dentro de su componente tras los métodos de controlador de eventos.
/** * Renders example use of CreateRecord Web API */ private renderCreateExample() { // Create header label for Web API sample let headerDiv: HTMLDivElement = this.createHTMLDivElement("create_container", true, "Click to create " + TSWebAPI._entityName + " record"); this._container.appendChild(headerDiv); // Create button 1 to create a record with the revenue field set to 100 let value1: string = "100"; this._createEntity1Button = this.createHTMLButtonElement( this.getCreateRecordButtonLabel(value1), this.getCreateButtonId(value1), value1, this.createButtonOnClickHandler.bind(this)); // Create button 2 to create a record with the revenue field set to 200 let value2: string = "200"; this._createEntity2Button = this.createHTMLButtonElement( this.getCreateRecordButtonLabel(value2), this.getCreateButtonId(value2), value2, this.createButtonOnClickHandler.bind(this)); // Create button 3 to create a record with the revenue field set to 300 let value3: string = "300"; this._createEntity3Button = this.createHTMLButtonElement( this.getCreateRecordButtonLabel(value3), this.getCreateButtonId(value3), value3, this.createButtonOnClickHandler.bind(this)); // Append all button HTML elements to custom control container div this._container.appendChild(this._createEntity1Button); this._container.appendChild(this._createEntity2Button); this._container.appendChild(this._createEntity3Button); } /** * Renders example use of DeleteRecord Web API */ private renderDeleteExample(): void { // Create header label for Web API sample let headerDiv: HTMLDivElement = this.createHTMLDivElement("delete_container", true, "Click to delete " + TSWebAPI._entityName + " record"); // Render button to invoke DeleteRecord Web API call this._deleteRecordButton = this.createHTMLButtonElement( "Select record to delete", "delete_button", null, this.deleteButtonOnClickHandler.bind(this)); // Append elements to custom control container div this._container.appendChild(headerDiv); this._container.appendChild(this._deleteRecordButton); } /** * Renders example use of RetrieveMultiple Web API with OData */ private renderODataRetrieveMultipleExample(): void { let containerClassName: string = "odata_status_container"; // Create header label for Web API sample let statusDivHeader: HTMLDivElement = this.createHTMLDivElement(containerClassName, true, "Click to refresh record count"); this._odataStatusContainerDiv = this.createHTMLDivElement(containerClassName, false, undefined); // Create button to invoke OData RetrieveMultiple Example this._fetchXmlRefreshButton = this.createHTMLButtonElement( "Refresh record count", "odata_refresh", null, this.refreshRecordCountButtonOnClickHandler.bind(this)); // Append HTML elements to custom control container div this._container.appendChild(statusDivHeader); this._container.appendChild(this._odataStatusContainerDiv); this._container.appendChild(this._fetchXmlRefreshButton); } /** * Renders example use of RetrieveMultiple Web API with Fetch XML */ private renderFetchXmlRetrieveMultipleExample(): void { let containerName: string = "fetchxml_status_container"; // Create header label for Web API sample let statusDivHeader: HTMLDivElement = this.createHTMLDivElement(containerName, true, "Click to calculate average value of " + TSWebAPI._currencyAttributeNameFriendlyName); let statusDiv: HTMLDivElement = this.createHTMLDivElement(containerName, false, undefined); // Create button to invoke Fetch XML RetrieveMultiple Web API example this._oDataRefreshButton = this.createHTMLButtonElement( "Calculate average value of " + TSWebAPI._currencyAttributeNameFriendlyName, "odata_refresh", null, this.calculateAverageButtonOnClickHandler.bind(this)); // Append HTML Elements to custom control container div this._container.appendChild(statusDivHeader); this._container.appendChild(statusDiv); this._container.appendChild(this._oDataRefreshButton); }Después de haber realizado las actualizaciones, la clase completada debe ser similar a la mostrada en el siguiente ejemplo.
import { IInputs, IOutputs } from "./generated/ManifestTypes"; export class TSWebAPI implements ComponentFramework.StandardControl<IInputs, IOutputs> { // Reference to the control container HTMLDivElement // This element contains all elements of our custom control example private _container: HTMLDivElement; // Reference to ComponentFramework Context object private _context: ComponentFramework.Context<IInputs>; // Flag if control view has been rendered private _controlViewRendered: Boolean; // References to button elements that are rendered by example custom control private _createEntity1Button: HTMLButtonElement; private _createEntity2Button: HTMLButtonElement; private _createEntity3Button: HTMLButtonElement; private _deleteRecordButton: HTMLButtonElement; private _fetchXmlRefreshButton: HTMLButtonElement; private _oDataRefreshButton: HTMLButtonElement; // References to div elements that are rendered by the example custom control private _odataStatusContainerDiv: HTMLDivElement; private _resultContainerDiv: HTMLDivElement; // Name of entity to use for example Web API calls that are performed by this control private static _entityName: string = "account"; // Required field on _entityName of type 'single line of text' // Example Web API calls that are performed by the example custom control will set this field for new record creation examples private static _requiredAttributeName: string = "name"; // Value that the _requiredAttributeName field will be set to for new created records private static _requiredAttributeValue: string = "Web API Custom Control (Sample)"; // Name of currency field on _entityName to populate during record create // Example Web API calls that are performed by the example custom control will set and read this field private static _currencyAttributeName: string = "revenue"; // Friendly name of currency field (only used for control UI - no functional impact) private static _currencyAttributeNameFriendlyName: string = "annual revenue"; /** * Empty constructor. */ constructor() { } /** * Used to initialize the control instance. Controls can kick off remote server calls and other initialization actions here. * Data-set values are not initialized here, use updateView. * @param context The entire property bag available to control via Context Object; It contains values as set up by the customizer mapped to property names defined in the manifest, as well as utility functions. * @param notifyOutputChanged A callback method to alert the framework that the control has new outputs ready to be retrieved asynchronously. * @param state A piece of data that persists in one session for a single user. Can be set at any point in a controls life cycle by calling 'setControlState' in the Mode interface. * @param container If a control is marked control-type='standard', it will receive an empty div element within which it can render its content. */ public init(context: ComponentFramework.Context<IInputs>, notifyOutputChanged: () => void, state: ComponentFramework.Dictionary, container: HTMLDivElement): void { this._context = context; this._controlViewRendered = false; this._container = document.createElement("div"); this._container.classList.add("TSWebAPI_Container"); container.appendChild(this._container); } /** * Called when any value in the property bag has changed. This includes field values, data-sets, global values such as container height and width, offline status, control metadata values such as label, visible, etc. * @param context The entire property bag available to control via Context Object; It contains values as set up by the customizer mapped to names defined in the manifest, as well as utility functions */ public updateView(context: ComponentFramework.Context<IInputs>): void { if (!this._controlViewRendered) { this._controlViewRendered = true; // Render Web API Examples this.renderCreateExample(); this.renderDeleteExample(); this.renderFetchXmlRetrieveMultipleExample(); this.renderODataRetrieveMultipleExample(); // Render result div to display output of Web API calls this.renderResultsDiv();} } /** * It is called by the framework prior to a control receiving new data. * @returns an object based on nomenclature defined in manifest, expecting object[s] for property marked as “bound” or “output” */ public getOutputs(): IOutputs { return {}; } /** * Called when the control is to be removed from the DOM tree. Controls should use this call for cleanup. * i.e. cancelling any pending remote calls, removing listeners, etc. */ public destroy(): void { // Add code to cleanup control if necessary } /** * Helper method to create HTML button that is used for CreateRecord Web API Example * @param buttonLabel : Label for button * @param buttonId : ID for button * @param buttonValue : Value of button (attribute of button) * @param onClickHandler : onClick event handler to invoke for the button */ private createHTMLButtonElement(buttonLabel: string, buttonId: string, buttonValue: string | null, onClickHandler: (event?: any) => void): HTMLButtonElement { let button: HTMLButtonElement = document.createElement("button"); button.innerHTML = buttonLabel; if (buttonValue) { button.setAttribute("buttonvalue", buttonValue); } button.id = buttonId; button.classList.add("SampleControl_WebAPI_ButtonClass"); button.addEventListener("click", onClickHandler); return button; } /** * Helper method to create HTML Div Element * @param elementClassName : Class name of div element * @param isHeader : True if 'header' div - adds extra class and post-fix to ID for header elements * @param innerText : innerText of Div Element */ private createHTMLDivElement(elementClassName: string, isHeader: Boolean, innerText?: string): HTMLDivElement { let div: HTMLDivElement = document.createElement("div"); if (isHeader) { div.classList.add("SampleControl_WebAPI_Header"); elementClassName += "_header"; } if (innerText) { div.innerText = innerText.toUpperCase(); } div.classList.add(elementClassName); return div; } /** * Renders a 'result container' div element to inject the status of the example Web API calls */ private renderResultsDiv() { // Render header label for result container let resultDivHeader: HTMLDivElement = this.createHTMLDivElement("result_container", true, "Result of last action"); this._container.appendChild(resultDivHeader); // Div elements to populate with the result text this._resultContainerDiv = this.createHTMLDivElement("result_container", false, undefined); this._container.appendChild(this._resultContainerDiv); // Init the result container with a notification that the control was loaded this.updateResultContainerText("Web API sample custom control loaded"); } /** * Helper method to inject HTML into result container div * @param statusHTML : HTML to inject into result container */ private updateResultContainerText(statusHTML: string): void { if (this._resultContainerDiv) { this._resultContainerDiv.innerHTML = statusHTML; } } /** * Helper method to inject error string into result container div after failed Web API call * @param errorResponse : error object from rejected promise */ private updateResultContainerTextWithErrorResponse(errorResponse: any): void { if (this._resultContainerDiv) { // Retrieve the error message from the errorResponse and inject into the result div let errorHTML: string = "Error with Web API call:"; errorHTML += "<br />" errorHTML += errorResponse.message; this._resultContainerDiv.innerHTML = errorHTML; } } /** * Helper method to generate Label for Create Buttons * @param entityNumber : value to set _currencyAttributeNameFriendlyName field to for this button */ private getCreateRecordButtonLabel(entityNumber: string): string { return "Create record with " + TSWebAPI._currencyAttributeNameFriendlyName + " of " + entityNumber; } /** * Helper method to generate ID for Create button * @param entityNumber : value to set _currencyAttributeNameFriendlyName field to for this button */ private getCreateButtonId(entityNumber: string): string { return "create_button_" + entityNumber; } /** * Event Handler for onClick of create record button * @param event : click event */ private createButtonOnClickHandler(event: Event): void { // Retrieve the value to set the currency field to from the button's attribute let currencyAttributeValue: Number = parseInt( (event.srcElement! as Element)!.attributes.getNamedItem("buttonvalue")!.value ); // Generate unique record name by appending timestamp to _requiredAttributeValue let recordName: string = TSWebAPI._requiredAttributeValue + "_" + Date.now(); // Set the values for the attributes we want to set on the new record // If you want to set additional attributes on the new record, add to data dictionary as key/value pair var data: any = {}; data[TSWebAPI._requiredAttributeName] = recordName; data[TSWebAPI._currencyAttributeName] = currencyAttributeValue; // store reference to 'this' so it can be used in the callback method var thisRef = this; // Invoke the Web API to create the new record this._context.webAPI.createRecord(TSWebAPI._entityName, data).then( function (response: ComponentFramework.LookupValue) { // Callback method for successful creation of new record // Get the ID of the new record created let id: string = response.id; // Generate HTML to inject into the result div to showcase the fields and values of the new record that is created let resultHtml: string = "Created new " + TSWebAPI._entityName + " record with below values:" resultHtml += "<br />"; resultHtml += "<br />"; resultHtml += "id: " + id; resultHtml += "<br />"; resultHtml += "<br />"; resultHtml += TSWebAPI._requiredAttributeName + ": " + recordName; resultHtml += "<br />"; resultHtml += "<br />"; resultHtml += TSWebAPI._currencyAttributeName + ": " + currencyAttributeValue; thisRef.updateResultContainerText(resultHtml); }, function (errorResponse: any) { // Error handling code here - record failed to be created thisRef.updateResultContainerTextWithErrorResponse(errorResponse); } ); } /** * Event Handler for onClick of delete record button * @param event : click event */ private deleteButtonOnClickHandler(): void { // Invoke a lookup dialog to allow the user to select an existing record of type _entityName to delete var lookUpOptions: any = { entityTypes: [TSWebAPI._entityName] }; // store reference to 'this' so it can be used in the callback method var thisRef = this; var lookUpPromise: any = this._context.utils.lookupObjects(lookUpOptions); lookUpPromise.then( // Callback method - invoked after user has selected an item from the lookup dialog // Data parameter is the item selected in the lookup dialog (data: ComponentFramework.EntityReference[]) => { if (data && data[0]) { // Get the ID and entityType of the record that was selected by the lookup let id: string = data[0].id.guid; let entityType: string = data[0].etn!; // Invoke the deleteRecord method of the WebAPI to delete the selected record this._context.webAPI.deleteRecord(entityType, id).then( function (response: ComponentFramework.LookupValue) { // Record was deleted successfully let responseId: string = response.id; let responseEntityType: string = response.name!; // Generate HTML to inject into the result div to showcase the deleted record thisRef.updateResultContainerText("Deleted " + responseEntityType + " record with ID: " + responseId); }, function (errorResponse: any) { // Error handling code here thisRef.updateResultContainerTextWithErrorResponse(errorResponse); } ); } }, (error: any) => { // Error handling code here thisRef.updateResultContainerTextWithErrorResponse(error); } ); } /** * Event Handler for onClick of calculate average value button * @param event : click event */ private calculateAverageButtonOnClickHandler(): void { // Build FetchXML to retrieve the average value of _currencyAttributeName field for all _entityName records // Add a filter to only aggregate on records that have _currencyAttributeName not set to null let fetchXML: string = "<fetch distinct='false' mapping='logical' aggregate='true'>"; fetchXML += "<entity name='" + TSWebAPI._entityName + "'>"; fetchXML += "<attribute name='" + TSWebAPI._currencyAttributeName + "' aggregate='avg' alias='average_val' />"; fetchXML += "<filter>"; fetchXML += "<condition attribute='" + TSWebAPI._currencyAttributeName + "' operator='not-null' />"; fetchXML += "</filter>"; fetchXML += "</entity>"; fetchXML += "</fetch>"; // store reference to 'this' so it can be used in the callback method var thisRef = this; // Invoke the Web API RetrieveMultipleRecords method to calculate the aggregate value this._context.webAPI.retrieveMultipleRecords(TSWebAPI._entityName, "?fetchXml=" + fetchXML).then( function (response: ComponentFramework.WebApi.RetrieveMultipleResponse) { // Retrieve multiple completed successfully -- retrieve the averageValue let averageVal: Number = response.entities[0].average_val; // Generate HTML to inject into the result div to showcase the result of the RetrieveMultiple Web API call let resultHTML: string = "Average value of " + TSWebAPI._currencyAttributeNameFriendlyName + " attribute for all " + TSWebAPI._entityName + " records: " + averageVal; thisRef.updateResultContainerText(resultHTML); }, function (errorResponse: any) { // Error handling code here thisRef.updateResultContainerTextWithErrorResponse(errorResponse); } ); } /** * Event Handler for onClick of calculate record count button * @param event : click event */ private refreshRecordCountButtonOnClickHandler(): void { // Generate OData query string to retrieve the _currencyAttributeName field for all _entityName records // Add a filter to only retrieve records with _requiredAttributeName field which contains _requiredAttributeValue let queryString: string = "?$select=" + TSWebAPI._currencyAttributeName + "&$filter=contains(" + TSWebAPI._requiredAttributeName + ",'" + TSWebAPI._requiredAttributeValue + "')"; // store reference to 'this' so it can be used in the callback method var thisRef = this; // Invoke the Web API Retrieve Multiple call this._context.webAPI.retrieveMultipleRecords(TSWebAPI._entityName, queryString).then() function (response: any) { // Retrieve Multiple Web API call completed successfully let count1: number = 0; let count2: number = 0; let count3: number = 0; // Loop through each returned record for (let entity of response.entities) { // Retrieve the value of _currencyAttributeName field let value: Number = entity[TSWebAPI._currencyAttributeName]; // Check the value of _currencyAttributeName field and increment the correct counter if (value == 100) { count1++; } else if (value == 200) { count2++; } else if (value == 300) { count3++; } } // Generate HTML to inject into the fetch xml status div to showcase the results of the OData retrieve example let innerHtml: string = "Use above buttons to create or delete a record to see count update"; innerHtml += "<br />"; innerHtml += "<br />"; innerHtml += "Count of " + TSWebAPI._entityName + " records with " + TSWebAPI._currencyAttributeName + " of 100: " + count1; innerHtml += "<br />"; innerHtml += "Count of " + TSWebAPI._entityName + " records with " + TSWebAPI._currencyAttributeName + " of 200: " + count2; innerHtml += "<br />"; innerHtml += "Count of " + TSWebAPI._entityName + " records with " + TSWebAPI._currencyAttributeName + " of 300: " + count3; // Inject the HTML into the fetch xml status div if (thisRef._odataStatusContainerDiv) { thisRef._odataStatusContainerDiv.innerHTML = innerHtml; } // Inject a success message into the result div thisRef.updateResultContainerText("Record count refreshed"); }, function (errorResponse: any) { // Error handling code here thisRef.updateResultContainerTextWithErrorResponse(errorResponse); } ); } /** * Renders example use of CreateRecord Web API */ private renderCreateExample() { // Create header label for Web API sample let headerDiv: HTMLDivElement = this.createHTMLDivElement("create_container", true, "Click to create " + TSWebAPI._entityName + " record"); this._container.appendChild(headerDiv); // Create button 1 to create a record with the revenue field set to 100 let value1: string = "100"; this._createEntity1Button = this.createHTMLButtonElement( this.getCreateRecordButtonLabel(value1), this.getCreateButtonId(value1), value1, this.createButtonOnClickHandler.bind(this)); // Create button 2 to create a record with the revenue field set to 200 let value2: string = "200"; this._createEntity2Button = this.createHTMLButtonElement( this.getCreateRecordButtonLabel(value2), this.getCreateButtonId(value2), value2, this.createButtonOnClickHandler.bind(this)); // Create button 3 to create a record with the revenue field set to 300 let value3: string = "300"; this._createEntity3Button = this.createHTMLButtonElement( this.getCreateRecordButtonLabel(value3), this.getCreateButtonId(value3), value3, this.createButtonOnClickHandler.bind(this)); // Append all button HTML elements to custom control container div this._container.appendChild(this._createEntity1Button); this._container.appendChild(this._createEntity2Button); this._container.appendChild(this._createEntity3Button); } /** * Renders example use of DeleteRecord Web API */ private renderDeleteExample(): void { // Create header label for Web API sample let headerDiv: HTMLDivElement = this.createHTMLDivElement("delete_container", true, "Click to delete " + TSWebAPI._entityName + " record"); // Render button to invoke DeleteRecord Web API call this._deleteRecordButton = this.createHTMLButtonElement( "Select record to delete", "delete_button", null, this.deleteButtonOnClickHandler.bind(this)); // Append elements to custom control container div this._container.appendChild(headerDiv); this._container.appendChild(this._deleteRecordButton); } /** * Renders example use of RetrieveMultiple Web API with OData */ private renderODataRetrieveMultipleExample(): void { let containerClassName: string = "odata_status_container"; // Create header label for Web API sample let statusDivHeader: HTMLDivElement = this.createHTMLDivElement(containerClassName, true, "Click to refresh record count"); this._odataStatusContainerDiv = this.createHTMLDivElement(containerClassName, false, undefined); // Create button to invoke OData RetrieveMultiple Example this._fetchXmlRefreshButton = this.createHTMLButtonElement( "Refresh record count", "odata_refresh", null, this.refreshRecordCountButtonOnClickHandler.bind(this)); // Append HTML elements to custom control container div this._container.appendChild(statusDivHeader); this._container.appendChild(this._odataStatusContainerDiv); this._container.appendChild(this._fetchXmlRefreshButton); } /** * Renders example use of RetrieveMultiple Web API with Fetch XML */ private renderFetchXmlRetrieveMultipleExample(): void { let containerName: string = "fetchxml_status_container"; // Create header label for Web API sample let statusDivHeader: HTMLDivElement = this.createHTMLDivElement(containerName, true, "Click to calculate average value of " + TSWebAPI._currencyAttributeNameFriendlyName); let statusDiv: HTMLDivElement = this.createHTMLDivElement(containerName, false, undefined); // Create button to invoke Fetch XML RetrieveMultiple Web API example this._oDataRefreshButton = this.createHTMLButtonElement( "Calculate average value of " + TSWebAPI._currencyAttributeNameFriendlyName, "odata_refresh", null, this.calculateAverageButtonOnClickHandler.bind(this)); // Append HTML Elements to custom control container div this._container.appendChild(statusDivHeader); this._container.appendChild(statusDiv); this._container.appendChild(this._oDataRefreshButton); }
Agregar estilo al componente de código
Para agregar estilo al componente de código, siga estos pasos:
Cree una nueva subcarpeta css en la carpeta TSWebAPI.
Cree un nuevo archivo TS_WebAPI.css en la subcarpeta CSS.
Agregue el siguiente contenido de estilo al archivo TS_WebAPI.css:
.SampleNamespace\.TSWebAPI { font-family: 'SegoeUI-Semibold', 'Segoe UI Semibold', 'Segoe UI Regular', 'Segoe UI'; color: #1160B7; } .SampleNamespace\.TSWebAPI .TSWebAPI_Container { overflow-x: auto; } .SampleNamespace\.TSWebAPI .SampleControl_WebAPI_Header { color: rgb(51, 51, 51); font-size: 1rem; padding-top: 20px; } .SampleNamespace\.TSWebAPI .result_container { padding-bottom: 20px; } .SampleNamespace\.TSWebAPI .SampleControl_WebAPI_ButtonClass { text-decoration: none; display: inline-block; font-size: 14px; cursor: pointer; color: #1160B7; background-color: #FFFFFF; border: 1px solid black; padding: 5px; text-align: center; min-width: 300px; margin-top: 10px; margin-bottom: 5px; display: block; }Seleccione Archivo y Guardar todo para guardar todos los cambios.
Crear y ejecutar el componente
Para crear y ejecutar el componente, siga estos pasos:
Compile su solución ejecutando el comando siguiente.
npm run buildDespués de realizar la compilación correctamente, puede probar su nuevo componente de API de formato ejecutando npm start.
npm startCierre la ventana del explorador de la herramienta de ejecución de pruebas.
Vuelva al terminal y presione [CONTROL] + C para detener el monitor.
Escriba Y y, luego, presione [ENTER].
Para probar la funcionalidad de la API web, debe publicar y alojar el componente en un entorno de Microsoft Power Platform. Para obtener más información sobre cómo publicar componentes de código, consulte "Crear un paquete de soluciones de componente de código" en el módulo Construir un componente de Power Apps.
Para obtener más información, consulte Implementar un componente de API web.