【TeeChart Pro ActiveX教程】（十二）：导入和导出图表（下）

ten文件是TeeChart自己的模板格式，用于保存图表及其数据。 修改的图表属性随模板一起保存，并在模板导入新图表时重现。

下载TeeChart Pro ActiveX最新版本

导出数据

系列数据有四种导出格式：

• 文字：TextFormat类
• XML：XMLFormat类
• HTML：HTMLFormat类
• Excel：ExcelFormat类

上述组件可以与图表系列相关联，从中可以将数据导出为文件，流或剪贴板。以下示例将图表系列中的数据导出到HTML表：

[C＃]

private void Form1_Load(object sender, System.EventArgs e)             Random rnd = new Random();            char c = new char();            for(int i = 0; i < 10; ++i)                 c = Convert.ToChar(65 + i);                bar1.Add(Convert.ToDouble(i),rnd.Next(100),c.ToString(),Color.Red);                 Steema.TeeChart.Export.DataExport dataExport = new Steema.TeeChart.Export.DataExport(tChart1.Chart);            dataExport.HTML.IncludeHeader = true;            dataExport.HTML.IncludeIndex = true;            dataExport.HTML.IncludeLabels = true;            dataExport.HTML.Series = bar1;            dataExport.HTML.Save(@"C:.htm"); 

[VB.Net]

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load            Dim C As New Char()            Dim i As New Integer()            For i = 0 To 10                C = Convert.ToChar(65 + i)                Bar1.Add(Convert.ToDouble(i), Rnd() * 100, C.ToString(), Color.Red)            Next            Dim DataExport As New Steema.TeeChart.Export.DataExport(TChart1.Chart)            DataExport.HTML.IncludeHeader = True            DataExport.HTML.IncludeIndex = True            DataExport.HTML.IncludeLabels = True            DataExport.HTML.Series = Bar1            DataExport.HTML.Save("C:.htm")End Sub 

带有随机数据集的上述输出如下：

<table border="1"><tr><td>Index</td><td>Text</td><td>bar1</td></tr><tr><td>0</td><td>A</td><td>69</td></tr><tr><td>1</td><td>B</td><td>93</td></tr><tr><td>2</td><td>C</td><td>18</td></tr><tr><td>3</td><td>D</td><td>88</td></tr><tr><td>4</td><td>E</td><td>42</td></tr><tr><td>5</td><td>F</td><td>33</td></tr><tr><td>6</td><td>G</td><td>58</td></tr><tr><td>7</td><td>H</td><td>43</td></tr><tr><td>8</td><td>I</td><td>63</td></tr><tr><td>9</td><td>J</td><td>49</td></tr></table>

TeeChart的’Ten’模板和数据导出/导入格式

ten文件

ten文件是TeeChart自己的模板格式，用于保存图表及其数据。 修改的图表属性随模板一起保存，并在模板导入新图表时重现。 好处：

• 十个文件的大小非常小，在大多数情况下，它提供了优于纯图形格式（qicker）的优势。
• 模板的目标图表是“实时”，可以进行缩放和滚动，并修改其属性。
• 根据您的偏好，数据可以选择包含在十个模板中。

[C＃]

private void button1_Click(object sender, System.EventArgs e)             saveFileDialog1.Filter = "TenFile (.ten)|*.ten";            saveFileDialog1.ShowDialog();            if(saveFileDialog1.FileName != "")                 tChart1.Export.Template.IncludeData = true;                tChart1.Export.Template.Save(saveFileDialog1.FileName); 

[VB.Net]

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click        SaveFileDialog1.Filter = "TenFile (.ten)|*.ten"        SaveFileDialog1.ShowDialog()        If SaveFileDialog1.FileName <> "" Then            TChart1.Export.Template.IncludeData = True            TChart1.Export.Template.Save(SaveFileDialog1.FileName)        End IfEnd Sub 

导入

导入XML到TeeChart

从TextBox导入XML。

[C＃]

protected override void button1_Click(object sender, System.EventArgs e)             tChart1.Series.RemoveAllSeries();            Steema.TeeChart.Styles.Points points1 = new Steema.TeeChart.Styles.Points(tChart1.Chart);            points1.Title = "Points Series";            xmlSource1.Series = points1;            xmlSource1.SeriesNode = "Points Series";            xmlSource1.Load(textBox2.Text);            tChart1.Refresh(); 

从URL导入XML。

[C＃]

protected override void button2_Click(object sender, System.EventArgs e)             tChart1.Series.RemoveAllSeries();            xmlSource1.Chart = tChart1.Chart;            xmlSource1.Load("http://www.steema.com/SampleNETData.xml");            tChart1.Refresh();         

导入ten格式文件

从本地文件源或http数据源导入已保存的Tee文件。

例，从文件导入

[C＃]

tChart1.Import.Template.LoadFileDialog(); 

[VB.Net]

TChart1.Import.Template.LoadFileDialog()

URL

[C＃]

tChart1.Import.Template.FromURL("http://www.berneda.com/demo.ten"); 

[VB.Net]

TChart1.Import.Template.FromURL("http://www.berneda.com/demo.ten") 

Stream

[C＃]

System.IO.MemoryStream tenStream = new System.IO.MemoryStream();tChart1.Export.Template.Save(tenStream);tChart2.Import.Template.Load(tenStream); 

[VB.Net]

Dim TenStream As New System.IO.MemoryStream()TChart1.Export.Template.Save(TenStream)TChart2.Import.Template.Load(TenStream)

在导入时所做更改的效果

效果仅保存对标准图表定义的更改，如果目标图表包含未导入要导入的图表的属性更改，则原件将继续执行。一个例子是图表页脚。如果.ten文件未设置页脚并且目标图表具有，则页脚将在导入后通过图表显示。这可能是理想的结果。如果您希望在导入图表后对导入图表进行更改可能会对所需结果产生负面影响，那么您可以创建图表的新实例，如下例所示：

[C＃]

private void Form1_Load(object sender, System.EventArgs e)         Bar bar1 = new Bar(tChart1.Chart);        bar1.FillSampleValues(20);private void button1_Click(object sender, System.EventArgs e)         saveFileDialog1.Filter = "TenFile (.ten)|*.ten";        saveFileDialog1.ShowDialog();        if(saveFileDialog1.FileName != "")             tChart1.Export.Template.IncludeData = true;            tChart1.Export.Template.Save(saveFileDialog1.FileName); private void button2_Click(object sender, System.EventArgs e)         tChart1.Dispose();        tChart1 = new Steema.TeeChart.TChart();        ini_Chart();private void ini_Chart()         this.tChart1.Header.Lines = new string[] "TeeChart";        this.tChart1.Location = new System.Drawing.Point(24, 24);        this.tChart1.Name = "tChart1";        this.tChart1.Size = new System.Drawing.Size(400, 240);        this.tChart1.TabIndex = 5;        this.Controls.AddRange(new System.Windows.Forms.Control[] this.tChart1);private void button3_Click(object sender, System.EventArgs e)         tChart1.Import.Template.LoadFileDialog(); 

[VB.Net]

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load        Dim Bar1 As New Steema.TeeChart.Styles.Bar(TChart1.Chart)        Bar1.FillSampleValues(20)End SubPrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click        SaveFileDialog1.Filter = "TenFile (.ten)|*.ten"        SaveFileDialog1.ShowDialog()        If Not SaveFileDialog1.FileName = "" Then            TChart1.Export.Template.IncludeData = True            TChart1.Export.Template.Save(SaveFileDialog1.FileName)        End IfEnd SubPrivate Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click        TChart1.Dispose()        TChart1 = New Steema.TeeChart.TChart()        Ini_Chart()End SubPrivate Sub Ini_Chart()        Me.TChart1.Header.Lines = New String() "TeeChart"        Me.TChart1.Location = New System.Drawing.Point(16, 16)        Me.TChart1.Name = "TChart1"        Me.TChart1.Size = New System.Drawing.Size(400, 296)        Me.TChart1.TabIndex = 3        Me.Controls.AddRange(New System.Windows.Forms.Control() Me.TChart1)End SubPrivate Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click        TChart1.Import.Template.LoadFileDialog()End Sub 

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