我正在尝试按照本教程为 Power BI 创建自定义视觉对象:https://learn.microsoft.com/en-us/power-bi/developer/custom-visual-develop-tutorial https://learn.microsoft.com/en-us/power-bi/developer/custom-visual-develop-tutorial
当我连接到 Power BI Cloud 时,使用默认代码的测试可以正常工作,如本教程的“测试自定义视觉对象”步骤 8 部分所示。
问题是,当我尝试在 Visual.ts 文件中添加类级属性时(在删除教程“开发视觉元素”步骤 2 部分中所示的代码之后),我收到错误“找不到命名为“IVisualHost”。
"use strict";
import "core-js/stable";
import "./../style/visual.less";
import powerbi from "powerbi-visuals-api";
import VisualConstructorOptions = powerbi.extensibility.visual.VisualConstructorOptions;
import VisualUpdateOptions = powerbi.extensibility.visual.VisualUpdateOptions;
import IVisual = powerbi.extensibility.visual.IVisual;
import EnumerateVisualObjectInstancesOptions = powerbi.EnumerateVisualObjectInstancesOptions;
import VisualObjectInstance = powerbi.VisualObjectInstance;
import DataView = powerbi.DataView;
import VisualObjectInstanceEnumerationObject = powerbi.VisualObjectInstanceEnumerationObject;
import { VisualSettings } from "./settings";
export class Visual implements IVisual {
private host: IVisualHost; ------------ the first error is here
private svg: d3.Selection<SVGElement>;
private container: d3.Selection<SVGElement>;
private circle: d3.Selection<SVGElement>;
private textValue: d3.Selection<SVGElement>;
private textLabel: d3.Selection<SVGElement>;
constructor(options: VisualConstructorOptions) {
this.svg = d3.select(options.element) ----------- the second error is here
.append('svg')
.classed('circleCard', true);
this.container = this.svg.append("g")
.classed('container', true);
this.circle = this.container.append("circle")
.classed('circle', true);
this.textValue = this.container.append("text")
.classed("textValue", true);
this.textLabel = this.container.append("text")
.classed("textLabel", true);
}
我在同一个 Visual.ts 文件中也有另一个错误:“d3”指的是 UMD 全局,但当前文件是一个模块。考虑添加导入。我使用以下命令导入了库:“npm i[电子邮件受保护] /cdn-cgi/l/email-protection--save”和“npm i @types/[电子邮件受保护] /cdn-cgi/l/email-protection"
这是我的 pbiviz.json 文件:
{
"visual": {
"name": "visual9basic",
"displayName": "visual9basic",
"guid": "visual9basic252E75AF09794C8F8CE14414674FBC3E",
"visualClassName": "Visual",
"version": "1.0.0",
"description": "",
"supportUrl": "",
"gitHubUrl": ""
},
"apiVersion": "2.6.0",
"author": {
"name": "",
"email": ""
},
"assets": {
"icon": "assets/icon.png"
},
"externalJS": [
"node_modules/powerbi-visuals-utils-dataviewutils/lib/index.js",
"node_modules/d3/d3.min.js"
],
"style": "style/visual.less",
"capabilities": "capabilities.json",
"dependencies": null,
"stringResources": []
}
这是我的 tsconfig.json :
{
"compilerOptions": {
"allowJs": false,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"target": "es6",
"sourceMap": true,
"outDir": "./.tmp/build/",
"moduleResolution": "node",
"declaration": true,
"lib": [
"es2015",
"dom"
]
},
"files": [
"node_modules/powerbi-visuals-utils-dataviewutils/lib/index.js",
"./src/visual.ts",
"./src/settings.ts",
]
}