
Pie 图
通过设置 ChartType
更改图表为 pie
图
Demo
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@page "/charts/pie"
<DemoBlock Title="Pie 图" Introduction="通过设置 <code>ChartType</code> 更改图表为 <code>pie</code> 图" Name="Pie">
<Chart ChartType="ChartType.Pie" OnInitAsync="@OnInit" OnAfterInitAsync="@OnAfterInit" OnAfterUpdateAsync="@OnAfterUpdate" @ref="PieChart" />
<div class="text-center mt-2 chart">
<div class="btn-group">
<button class="btn btn-primary" @onclick="e => Utility.RandomData(PieChart)"><i class="fa fa-pie-chart"></i><span>随机数据</span></button>
<button class="btn btn-primary" @onclick="e => Utility.AddDataSet(PieChart, ref PieDatasetCount)"><i class="fa fa-plus-circle"></i><span>添加数据集</span></button>
<button class="btn btn-primary" @onclick="e => Utility.RemoveDataSet(PieChart, ref PieDatasetCount)"><i class="fa fa-minus-circle"></i><span>移除数据集</span></button>
<button class="btn btn-primary" @onclick="e => Utility.AddData(PieChart, ref PieDataCount)"><i class="fa fa-plus"></i><span>添加数据</span></button>
<button class="btn btn-primary" @onclick="e => Utility.RemoveData(PieChart, ref PieDataCount)"><i class="fa fa-minus"></i><span>移除数据</span></button>
</div>
</div>
<BlockLogger @ref="Logger" class="mt-3" />
</DemoBlock>
<ChartToast />
// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
// Website: https://www.blazor.zone or https://argozhang.github.io/
using BootstrapBlazor.Components;
using BootstrapBlazor.Shared.Components;
namespace BootstrapBlazor.Shared.Samples.Charts;
/// <summary>
///
/// </summary>
public partial class Pie
{
private Random Randomer { get; } = new Random();
private int PieDatasetCount = 1;
private int PieDataCount = 5;
[NotNull]
private Chart? PieChart { get; set; }
[NotNull]
private BlockLogger? Logger { get; set; }
/// <summary>
///
/// </summary>
/// <param name="firstRender"></param>
protected override void OnAfterRender(bool firstRender)
{
base.OnAfterRender(firstRender);
if (firstRender)
{
Logger.Log("Pie 正在加载数据 ...");
}
}
private Task OnAfterInit()
{
Logger.Log("Pie 初始化完毕");
return Task.CompletedTask;
}
private Task OnAfterUpdate(ChartAction action)
{
Logger.Log($"Pie 图更新数据操作完毕 -- {action}");
return Task.CompletedTask;
}
private Task<ChartDataSource> OnInit()
{
var ds = new ChartDataSource();
ds.Options.Title = "Pie 饼图";
ds.Labels = Utility.Colors.Take(PieDataCount);
for (var index = 0; index < PieDatasetCount; index++)
{
ds.Data.Add(new ChartDataset()
{
Label = $"数据集 {index}",
Data = Enumerable.Range(1, PieDataCount).Select(i => Randomer.Next(20, 37)).Cast<object>()
});
}
return Task.FromResult(ds);
}
}