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WPF实现统计图

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前言

    有小伙伴提出需要实现统计图。 

WPF实现统计图

 

由于在WPF中没有现成的统计图控件,所以我们自己实现一个。

PS:有更好的方式欢迎推荐。

代码如下

一、创建 BasicBarChart.cs 继承 Control代码如下。

BasicBarChart.cs实现思路如下

1、SeriesArray :存放展示集合 。

2、重写OnRender 。

3、先绘制X轴线。

4、调用GetFormattedText()绘制底部类别。

5、调用GetFormattedText()绘制左侧标尺。

6、DrawingContext绘制Line的时候会发虚,以下方法可以避免

 var d = Pen.Thickness / 2;

 var guidelines = new GuidelineSet(new[] { d }, new[] { d });

drawingContext.PushGuidelineSet(guidelines);

或者调用

SnapDrawingExtensions.DrawSnappedLinesBetweenPoints()

避免画线发虚。

 

 

 

WPF实现统计图

using System; using System.Collections.Generic; using System.Globalization; using System.Linq; using System.Windows; using System.Windows.Controls; using System.Windows.Media;  namespace WPFDevelopers.Controls {     public class BasicBarChart : Control     {         public IEnumerable<KeyValuePair<string, double>> SeriesArray         {             get { return (IEnumerable<KeyValuePair<string, double>>)GetValue(SeriesArrayProperty); }             set { SetValue(SeriesArrayProperty, value); }         }          public static readonly DependencyProperty SeriesArrayProperty =             DependencyProperty.Register("SeriesArray", typeof(IEnumerable<KeyValuePair<string, double>>), typeof(BasicBarChart), new UIPropertyMetadata(SeriesArrayChanged));         private static void SeriesArrayChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)         {             BasicBarChart radarChart = d as BasicBarChart;             if (e.NewValue != null)                 radarChart.InvalidateVisual();         }           static BasicBarChart()         {             DefaultStyleKeyProperty.OverrideMetadata(typeof(BasicBarChart), new FrameworkPropertyMetadata(typeof(BasicBarChart)));         }         protected override void OnRender(DrawingContext drawingContext)         {             //base.OnRender(drawingContext);             if (SeriesArray == null || SeriesArray.Count() == 0)                 return;             SnapsToDevicePixels = true;             UseLayoutRounding = true;             var brushConverter = new BrushConverter();             var myPen = new Pen             {                 Thickness = 1,                 Brush = (Brush)brushConverter.ConvertFromString("#6E7079")             };             myPen.Freeze();              //var d = myPen.Thickness / 2;             //var guidelines = new GuidelineSet(new[] { d }, new[] { d });             //drawingContext.PushGuidelineSet(guidelines);              var h = this.ActualHeight / 2 + 160;             var w = this.ActualWidth / 2;             var startX = w / 3;             var width = SeriesArray.Count() * 120 + startX;             //drawingContext.DrawLine(myPen, new Point(startX, h), new Point(width, h));             var stratNum = 0;              SnapDrawingExtensions.DrawSnappedLinesBetweenPoints(drawingContext,myPen,myPen.Thickness, new Point(startX, h), new Point(width, h));             var formattedText = GetFormattedText(stratNum.ToString());             drawingContext.DrawText(formattedText, new Point(startX - formattedText.Width * 2 - 10, h - formattedText.Height / 2));             var x = startX;             //var y = h + d;             var y = h + myPen.Thickness;             var points = new List<Point>();             var rectBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#5470C6"));             for (int i = 0; i < SeriesArray.Count() + 1; i++)             {                 //drawingContext.DrawLine(myPen, new Point(x, y), new Point(x, y + 4));                 points.Add(new Point(x, y));                 points.Add(new Point(x, y + 4));                 x = x + 120;             }             SnapDrawingExtensions.DrawSnappedLinesBetweenPoints(drawingContext, myPen, myPen.Thickness, points.ToArray());              var xAxisPen = new Pen             {                 Thickness = 1,                 Brush = (Brush)brushConverter.ConvertFromString("#E0E6F1")             };             xAxisPen.Freeze();             var xAxis = h - 80;             int max = Convert.ToInt32(SeriesArray.Max(kvp => kvp.Value));             max = (max / 50 + (max % 50 == 0 ? 0 : 1)) * 50 / 50;             int min = Convert.ToInt32(SeriesArray.Min(kvp => kvp.Value));             points.Clear();             for (int i = 0; i < max; i++)             {                 //drawingContext.DrawLine(xAxisPen, new Point(startX, xAxis), new Point(width, xAxis));                 points.Add(new Point(startX, xAxis));                 points.Add(new Point(width, xAxis));                 stratNum += 50;                 formattedText = GetFormattedText(stratNum.ToString());                 drawingContext.DrawText(formattedText, new Point(startX - formattedText.Width - 10, xAxis - formattedText.Height / 2));                 xAxis = xAxis - 80;             }             SnapDrawingExtensions.DrawSnappedLinesBetweenPoints(drawingContext, xAxisPen, xAxisPen.Thickness, points.ToArray());              x = startX;             var rectWidth = 85;             var rectHeight = 0D;             for (int i = 0; i < SeriesArray.Count(); i++)             {                 formattedText = GetFormattedText(SeriesArray.ToList()[i].Key);                 drawingContext.DrawText(formattedText, new Point(x + 120 / 2 - formattedText.Width / 2, y + 4));                 var _value = SeriesArray.ToList()[i].Value;                 //rectHeight = _value * 200;                 rectHeight = (_value - 0) / (stratNum - 0) * (80 * max);                 //rectHeight = (stratNum - _value) / 100 * stratNum;                 drawingContext.DrawRectangle(rectBrush, null, new Rect(x + (120 - 85) / 2, h - rectHeight, rectWidth, rectHeight));                 x = x + 120;             }         }         FormattedText GetFormattedText(string text)         {             var brushConverter = new BrushConverter();             return new FormattedText(                  text,                  CultureInfo.CurrentCulture,                  FlowDirection.LeftToRight,                  new Typeface(new FontFamily("Microsoft YaHei"), FontStyles.Normal, FontWeights.UltraLight, FontStretches.Normal),                  12, (Brush)brushConverter.ConvertFromString("#6E7079"))             {                 MaxLineCount = 1,                 TextAlignment = TextAlignment.Justify,                 Trimming = TextTrimming.CharacterEllipsis             };         }     }     public static class SnapDrawingExtensions     {         public static void DrawSnappedLinesBetweenPoints(this DrawingContext dc,             Pen pen, double lineThickness, params Point[] points)         {             var guidelineSet = new GuidelineSet();             foreach (var point in points)             {                 guidelineSet.GuidelinesX.Add(point.X);                 guidelineSet.GuidelinesY.Add(point.Y);             }             var half = lineThickness / 2;             points = points.Select(p => new Point(p.X + half, p.Y + half)).ToArray();             dc.PushGuidelineSet(guidelineSet);             for (var i = 0; i < points.Length - 1; i = i + 2)             {                 dc.DrawLine(pen, points[i], points[i + 1]);             }             dc.Pop();         }     } }

 

如何换算出统计条占比如下:

 

 WPF实现统计图

 

二、创建BasicBarChartExample.xaml代码如下

WPF实现统计图

<UserControl x:Class="WPFDevelopers.Samples.ExampleViews.BasicBarChartExample"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"               xmlns:d="http://schemas.microsoft.com/expression/blend/2008"               xmlns:local="clr-namespace:WPFDevelopers.Samples.ExampleViews"              xmlns:wpfdev="https://github.com/yanjinhuagood/WPFDevelopers"              mc:Ignorable="d"               d:DesignHeight="450" d:DesignWidth="800">     <Grid Background="Gainsboro">         <Border             Height="500"             Background="White"             Margin="30,0">             <Grid Margin="20,10">                                  <Grid.RowDefinitions>                     <RowDefinition Height="40" />                     <RowDefinition />                     <RowDefinition Height="auto" />                 </Grid.RowDefinitions>                 <WrapPanel HorizontalAlignment="Right">                     <Rectangle                         Width="6"                         Height="26"                         Fill="Black" />                     <TextBlock                         Padding="10,0"                         FontSize="24"                         FontWeight="Black"                         Text="{Binding KeyBarChart, RelativeSource={RelativeSource AncestorType=local:BasicBarChartExample}}" />                 </WrapPanel>                 <wpfdev:BasicBarChart                      Grid.Row="1"                     SeriesArray="{Binding SeriesModels, RelativeSource={RelativeSource AncestorType=local:BasicBarChartExample}}"/>                 <Button                     Grid.Row="2"                     Width="200"                     VerticalAlignment="Bottom"                     Click="Button_Click"                     Content="刷新"                     Style="{StaticResource PrimaryButton}" />             </Grid>         </Border>     </Grid> </UserControl>

三、创建BasicBarChartExample.xaml.cs代码如下

WPF实现统计图

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes;  namespace WPFDevelopers.Samples.ExampleViews {     /// <summary>     /// BasicBarChartExample.xaml 的交互逻辑     /// </summary>     public partial class BasicBarChartExample : UserControl     {         public IEnumerable<KeyValuePair<string, double>> SeriesModels         {             get { return (IEnumerable<KeyValuePair<string, double>>)GetValue(SeriesModelsProperty); }             set { SetValue(SeriesModelsProperty, value); }         }          public static readonly DependencyProperty SeriesModelsProperty =             DependencyProperty.Register("SeriesModels", typeof(IEnumerable<KeyValuePair<string, double>>), typeof(BasicBarChartExample), new PropertyMetadata(null));           Dictionary<string, IEnumerable<KeyValuePair<string, double>>> keyValues = new Dictionary<string, IEnumerable<KeyValuePair<string, double>>>();         public string KeyBarChart         {             get { return (string)GetValue(KeyBarChartProperty); }             set { SetValue(KeyBarChartProperty, value); }         }         public static readonly DependencyProperty KeyBarChartProperty =      DependencyProperty.Register("KeyBarChart", typeof(string), typeof(BasicBarChartExample), new PropertyMetadata(null));         private int _index = 0;         public BasicBarChartExample()         {             InitializeComponent();             var Models1 = new[]             {                 new KeyValuePair<string, double>("Mon", 120),                 new KeyValuePair<string, double>("Tue", 130),                 new KeyValuePair<string, double>("Wed", 160),                 new KeyValuePair<string, double>("Thu", 140),                 new KeyValuePair<string, double>("Fri", 200) ,                 new KeyValuePair<string, double>("Sat", 80) ,                 new KeyValuePair<string, double>("Sun", 90) ,             };             keyValues.Add("到访数", Models1);             var Models2 = new[]             {                 new KeyValuePair<string, double>("蛐蛐", 120),                 new KeyValuePair<string, double>("常威", 170),                 new KeyValuePair<string, double>("来福", 30),                 new KeyValuePair<string, double>("包龙星", 200),                 new KeyValuePair<string, double>("包有为", 100) ,                 new KeyValuePair<string, double>("雷豹", 180) ,                 new KeyValuePair<string, double>("方唐镜", 90) ,             };             keyValues.Add("能力值", Models2);              SeriesModels = keyValues.ToList()[0].Value;             KeyBarChart = keyValues.ToList()[0].Key;         }          private void Button_Click(object sender, RoutedEventArgs e)         {             _index++;             if (_index >= keyValues.Count)             {                 _index = 0;             }             SeriesModels = keyValues.ToList()[_index].Value;             KeyBarChart = keyValues.ToList()[_index].Key;         }     } }

效果预览

WPF实现统计图

 

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WPF实现统计图

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源码Github:https://github.com/yanjinhuagood/WPFDevelopers.git

gitee:https://gitee.com/yanjinhua/WPFDevelopers.git

 

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