【TeeChart Pro ActiveX教程】（十二）：導(dǎo)入和導(dǎo)出圖表（下）

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下載TeeChart Pro ActiveX最新版本

導(dǎo)出數(shù)據(jù)

系列數(shù)據(jù)有四種導(dǎo)出格式：

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

上述組件可以與圖表系列相關(guān)聯(lián)，從中可以將數(shù)據(jù)導(dǎo)出為文件，流或剪貼板。以下示例將圖表系列中的數(shù)據(jù)導(dǎo)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 

帶有隨機(jī)數(shù)據(jù)集的上述輸出如下：

<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'模板和數(shù)據(jù)導(dǎo)出/導(dǎo)入格式

ten文件

ten文件是TeeChart自己的模板格式，用于保存圖表及其數(shù)據(jù)。 修改的圖表屬性隨模板一起保存，并在模板導(dǎo)入新圖表時(shí)重現(xiàn)。 好處：

• 十個文件的大小非常小，在大多數(shù)情況下，它提供了優(yōu)于純圖形格式（qicker）的優(yōu)勢。
• 模板的目標(biāo)圖表是“實(shí)時(shí)”，可以進(jìn)行縮放和滾動，并修改其屬性。
• 根據(jù)您的偏好，數(shù)據(jù)可以選擇包含在十個模板中。

[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 If 
End Sub 

導(dǎo)入

導(dǎo)入XML到TeeChart

從TextBox導(dǎo)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(); 

從URL導(dǎo)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(); 
         

導(dǎo)入ten格式文件

從本地文件源或http數(shù)據(jù)源導(dǎo)入已保存的Tee文件。

例，從文件導(dǎo)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) 

在導(dǎo)入時(shí)所做更改的效果

效果僅保存對標(biāo)準(zhǔn)圖表定義的更改，如果目標(biāo)圖表包含未導(dǎo)入要導(dǎo)入的圖表的屬性更改，則原件將繼續(xù)執(zhí)行。一個例子是圖表頁腳。如果.ten文件未設(shè)置頁腳并且目標(biāo)圖表具有，則頁腳將在導(dǎo)入后通過圖表顯示。這可能是理想的結(jié)果。如果您希望在導(dǎo)入圖表后對導(dǎo)入圖表進(jìn)行更改可能會對所需結(jié)果產(chǎn)生負(fù)面影響，那么您可以創(chuàng)建圖表的新實(shí)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 Sub 
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 Not SaveFileDialog1.FileName = "" Then 
            TChart1.Export.Template.IncludeData = True 
            TChart1.Export.Template.Save(SaveFileDialog1.FileName) 
        End If 
End Sub 
Private 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 Sub 
Private 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 Sub 
Private 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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