大家好，又见面了，我是你们的朋友全栈君。
由于项目中需要使用Visifire所以自己就写了一些demo，大家一起共享！
基础Visifire图表的展示
1.Visifire的创建需要引用的DLL包【WPFToolkit.dll;WPFVisifire.Charts;WPFVisifire.Gauges(这个以后会用到)】
2.我们开始创建简单的Visifire图表
第一步：前台代码
代码语言：javascript复制<Window x:Class="Wpf_Tray.VisifireWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:vc="clr-namespace:Visifire.Charts;assembly=WPFVisifire.Charts" Title="VisifireWindow" Height="378" Width="536" WindowStartupLocation="CenterScreen"> <Grid Name="LayoutRoot"> <vc:Chart Name="chart" DockPanel.Dock="Left" Margin="0,40,0,2" /> <Button Content="showChartData" Height="23" HorizontalAlignment="Left" Margin="24,8,0,0" Name="btn_showChartData" VerticalAlignment="Top" Width="97" Click="btn_showChartData_Click" /> <Button Content="ExportToPng" Height="23" HorizontalAlignment="Left" Margin="134,8,0,0" Name="btn_ExportToPng" VerticalAlignment="Top" Width="88" Click="btn_ExportToPng_Click" /> <Button Content="ExportChart" Height="23" HorizontalAlignment="Left" Margin="233,8,0,0" Name="btn_ExportChart" Click="btn_ExportChart_Click" VerticalAlignment="Top" Width="75" /> </Grid></Window>写完后的一个显示效果，如图;
第二步：
实现后台绑定数据，上代码：
代码语言：javascript复制/// <summary> /// 绑定数据 /// </summary> private void BindData() { DataSet ds = DBSQLHelper.Search("select * from hospitalorg",null, CommandType.Text); BindChart(ds.Tables[0]); }#region 绑定界面上的Chart
/// <summary>
/// 绑定界面上的Chart
/// </summary>
/// <param name="dt">Chart数据源</param>
public void BindChart(DataTable dtChart)
{
//绑定Chart
this.chart.Series.Clear();
this.chart.Titles.Clear();
this.chart.AnimationEnabled = true;
this.chart.ThemeEnabled = true;
this.chart.Width = 500;
this.chart.Height = 300;
//使Chart显示三维
this.chart.View3D = true;
DataSeries dataSeries = new DataSeries();
//Chart的实例这是以饼图显示 Bubble
DataPoint datapoint = null;
for (int i = 0; i < dtChart.Rows.Count; i )
{
datapoint = new DataPoint();
datapoint.AxisXLabel = dtChart.Rows[i]["hospitalName"].ToString();
datapoint.YValue = Convert.ToDouble(dtChart.Rows[i]["hospitalId"].ToString());
datapoint.Tag = dtChart.Rows[i]["hospitalId"].ToString();
//DataPoint被点击执行事件
datapoint.MouseLeftButtonDown = new MouseButtonEventHandler(datapoint_MouseLeftButtonDown);
dataSeries.DataPoints.Add(datapoint);
}
//绑定当鼠标放上去显示的信息
dataSeries.LabelAngle = -30;
this.chart.Series.Add(dataSeries);
Title title = new Title();
title.Text = "某某医院...";
this.chart.Titles.Add(title);
this.chart.ShadowEnabled = true;
}
#endregion public VisifireWindow() { InitializeComponent(); BindData(); }绑定后的效果，如图：
这是绑定一列的！
第三步：
如图，有三个按钮，‘showChartData’，‘ExportToPng’
1.showChartData，主要是多列数据绑定，实现效果如图：
上代码：
代码语言：javascript复制#region 可以显示多列，绑定界面Chart private void BindMoreColumnChart(DataTable dtChart) { this.chart.Series.Clear(); this.chart.AnimationEnabled = true; this.chart.View3D = true; DataSeries dataSeries = new DataSeries(); dataSeries.RenderAs = RenderAs.Bar; dataSeries.LabelEnabled = true; dataSeries.LegendText = "最小值";//图例显示的信息 dataSeries.LabelText = "#AxisXLabel, #YValue"; DataPoint datapoint; for (int i = 0; i < dtChart.Rows.Count; i ) { datapoint = new DataPoint(); datapoint.AxisXLabel = dtChart.Rows[i]["job_id"].ToString(); datapoint.YValue = Convert.ToDouble(dtChart.Rows[i]["min_lvl"].ToString()); dataSeries.DataPoints.Add(datapoint); } this.chart.Series.Add(dataSeries); DataSeries dataSeries1 = new DataSeries(); dataSeries1.RenderAs = RenderAs.Bar; dataSeries1.LabelEnabled = true; DataPoint datapoint1; for (int i = 0; i < dtChart.Rows.Count; i ) { datapoint1 = new DataPoint(); datapoint1.AxisXLabel = dtChart.Rows[i]["job_id"].ToString(); datapoint1.YValue = Convert.ToDouble(dtChart.Rows[i]["max_lvl"].ToString()); dataSeries1.DataPoints.Add(datapoint1); } dataSeries1.LegendText = "最大值"; dataSeries1.LabelText = "#AxisXLabel, #YValue"; this.chart.Series.Add(dataSeries1); this.chart.ShadowEnabled = true; } #endregion2.ExportTopng，是将visifire当前实现的图表导成png，上代码:
代码语言：javascript复制 #region ExportToPng /// <summary> /// ExportToPng /// </summary> /// <param name="path"></param> /// <param name="surface"></param> public void ExportToPng(Uri path,Visifire.Charts.Chart surface) { if (path == null) return; //Save current canvas transform 保存当前画布变换 Transform transform = surface.LayoutTransform; //reset current transform (in case it is scaled or rotated) 重设当前画布（如果缩放或旋转） surface.LayoutTransform = null; //Create a render bitmap and push the surface to it 创建一个渲染位图和表面 RenderTargetBitmap renderBitmap = new RenderTargetBitmap( (int)surface.Width, (int)surface.Height, 96d, 96d, PixelFormats.Pbgra32); renderBitmap.Render(surface); // Create a file stream for saving image using (FileStream outStream = new FileStream(path.LocalPath,FileMode.Create)) { //Use png encoder for our data PngBitmapEncoder encoder = new PngBitmapEncoder(); // push the rendered bitmap to it encoder.Frames.Add(BitmapFrame.Create(renderBitmap)); // save the data to the stream encoder.Save(outStream); } // Restore previously saved layout 恢复以前保存布局 surface.LayoutTransform = transform; } #endregion#region 将Visifire图表保存为图片 http://www.visifire.com/blog/page/15/ private void btn_ExportToPng_Click(object sender, RoutedEventArgs e) { ExportToPng(new Uri("D:/Visifire.png"), this.chart); }#endregion【这只是基础，大家可以了解下，想起昨天看大本营了，快乐未完待续，我想说，学习未完待续！大家可以看看visifire官方网站的文档进行学习，http//www.visifire.com/】
发布者：全栈程序员栈长，转载请注明出处：https://javaforall.cn/162778.html原文链接：https://javaforall.cn
