【TeeChart .NET教程】（十二）導(dǎo)出和導(dǎo)入圖表

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【下載TeeChart.Net最新版本】

（一）導(dǎo)出圖表

1.1 可用格式

可用導(dǎo)出格式，可以將所有格式復(fù)制到文件或剪貼板或Stream。

1.1.1 圖像格式

• BMP: BitmapFormat Class
• JPEG: JPEGFormat Class
• WMF & EMF: MetafileFormat Class
• GIF: GIFFormat Class
• PNG: PNGFormat Class
• TIFF: TIFFFormat Class

1.1.2 數(shù)據(jù)格式

• Text: TextFormat Class
• XML: XMLFormat Class
• HTML: HTMLFormat Class
• Excel: ExcelFormat Class

1.1.3 其他格式

TEN格式是一種靈活的格式，可存儲(chǔ)圖表屬性信息和（可選）圖表數(shù)據(jù)，文件很小（取決于數(shù)據(jù)），非常適合網(wǎng)絡(luò)用于更新基于實(shí)時(shí)客戶(hù)端的圖表。

• TEN (TeeChart): TemplateExport Classs

1.2 示例導(dǎo)出

導(dǎo)出到文件是合理的，在大多數(shù)情況下，只需要定義目標(biāo)文件名。

[C#.Net]

private void button1_Click(object sender, System.EventArgs e)  
            saveFileDialog1.Filter = "Images (*.bmp)|*.bmp|Images(*.jpg)|*.jpg|Images(*.wmf)|*.wmf|Images(*.emf)|*.emf|Images (*.gif)|*.gif|Images (*.png)|*.png|Images (*.tiff)|*.tiff"; 
            saveFileDialog1.ShowDialog(); 
            if(saveFileDialog1.FileName != "")  
                switch(saveFileDialog1.FilterIndex)  
                    case 1: 
                        tChart1.Export.Image.Bitmap.Save(saveFileDialog1.FileName); 
                        break; 
                    case 2: 
                        tChart1.Export.Image.JPEG.Save(saveFileDialog1.FileName); 
                        break; 
                    case 3: 
                        tChart1.Export.Image.Metafile.Enhanced = false; 
                        tChart1.Export.Image.Metafile.Save(saveFileDialog1.FileName); 
                        break; 
                    case 4: 
                        tChart1.Export.Image.Metafile.Enhanced = true; 
                        tChart1.Export.Image.Metafile.Save(saveFileDialog1.FileName); 
                        break; 
                    case 5: 
                        tChart1.Export.Image.GIF.Save(saveFileDialog1.FileName); 
                        break; 
                    case 6: 
                        tChart1.Export.Image.PNG.Save(saveFileDialog1.FileName); 
                        break; 
                    case 7: 
                        tChart1.Export.Image.TIFF.Save(saveFileDialog1.FileName); 
                        break;

[VB.Net]

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click 
        SaveFileDialog1.Filter = "Images (*.bmp)|*.bmp|Images(*.jpg)|*.jpg|Images(*.wmf)|*.wmf|Images(*.emf)|*.emf|Images (*.gif)|*.gif|Images (*.png)|*.png|Images (*.tiff)|*.tiff" 
        SaveFileDialog1.ShowDialog() 
        If SaveFileDialog1.FileName <> "" Then 
            Select Case SaveFileDialog1.FilterIndex 
                Case 1 
                    TChart1.Export.Image.Bitmap.Save(SaveFileDialog1.FileName) 
                Case 2 
                    TChart1.Export.Image.JPEG.Save(SaveFileDialog1.FileName) 
                Case 3 
                    TChart1.Export.Image.Metafile.Enhanced = False 
                    TChart1.Export.Image.Metafile.Save(SaveFileDialog1.FileName) 
                Case 4 
                    TChart1.Export.Image.Metafile.Enhanced = True 
                    TChart1.Export.Image.Metafile.Save(SaveFileDialog1.FileName) 
                Case 5 
                    TChart1.Export.Image.GIF.Save(SaveFileDialog1.FileName) 
                Case 6 
                    TChart1.Export.Image.PNG.Save(SaveFileDialog1.FileName) 
                Case 7 
                    TChart1.Export.Image.TIFF.Save(SaveFileDialog1.FileName) 
            End Select 
        End If 
End Sub

（二） 導(dǎo)出圖像

2.1 BMP

BMP文件導(dǎo)出具有顏色和大小的附加參數(shù)。例：

[C#.Net]

case 1: 
     Steema.TeeChart.Export.BitmapFormat bitMap = tChart1.Export.Image.Bitmap; 
     bitMap.Height = 500; 
     bitMap.Width = 700; 
     bitMap.Monochrome = true; 
     bitMap.Save(saveFileDialog1.FileName); 
     break;

[VB.Net]

Case 1 
     Dim BitMap As Steema.TeeChart.Export.BitmapFormat = TChart1.Export.Image.Bitmap 
     BitMap.Height = 500 
     BitMap.Width = 700 
     BitMap.Monochrome = True 
     BitMap.Save(SaveFileDialog1.FileName)

2.2 JPEG

JPEG文件導(dǎo)出現(xiàn)在具有SaveToFile和SaveToStream的速度和質(zhì)量參數(shù)，例

[C#.Net]

case 2: 
Steema.TeeChart.Export.JPEGFormat jPEG = tChart1.Export.Image.JPEG; 
     jPEG.GrayScale = true; 
     jPEG.Height = 500; 
     jPEG.Width = 700; 
     jPEG.Quality = 100; 
     jPEG.Save(saveFileDialog1.FileName); 
     break;

[VB.Net]

Case 2 
Dim JPEGf As Steema.TeeChart.Export.JPEGFormat = TChart1.Export.Image.JPEG 
     JPEGf.Height = 500 
     JPEGf.Width = 700 
     JPEGf.GrayScale = True 
     JPEGf.Quality = 100 
     JPEGf.Save(SaveFileDialog1.FileName)

Quality value質(zhì)量值（從1到100）將使文件更大，網(wǎng)絡(luò)傳輸就慢，但質(zhì)量更好！您需要根據(jù)自己的應(yīng)用決定最佳平衡。通過(guò)將“Enhanced”設(shè)置為T(mén)rue簡(jiǎn)單地創(chuàng)建

2.3 WMF & EMF

通過(guò)將“Enhanced”設(shè)置為T(mén)rue，可以簡(jiǎn)單地創(chuàng)建增強(qiáng)型圖元文件，例：

[C#.Net]

case 3: 
     Steema.TeeChart.Export.MetafileFormat metaFile = tChart1.Export.Image.Metafile; 
     metaFile.Height = 500; 
     metaFile.Width = 700; 
     metaFile.Enhanced = false; 
     metaFile.Save(saveFileDialog1.FileName); 
     break;

[VB.Net]

Case 3 
     Dim MetaFile As Steema.TeeChart.Export.MetafileFormat = TChart1.Export.Image.Metafile 
     MetaFile.Height = 500 
     MetaFile.Width = 700 
     MetaFile.Enhanced = False 
     MetaFile.Save(SaveFileDialog1.FileName)

2.4 GIF

由于Microsoft的.Net Framework類(lèi)庫(kù)，特別是System.Drawing.Imaging命名空間中包含的類(lèi)，TeeChart for .Net能夠支持以GIF格式導(dǎo)出位圖。 到目前為止，尚不清楚在其應(yīng)用程序中實(shí)現(xiàn)這些類(lèi)的開(kāi)發(fā)人員是否需要從Unisys獲得GIF專(zhuān)利許可。

[C#.Net]

case 5: 
     Steema.TeeChart.Export.GIFFormat gIF = tChart1.Export.Image.GIF; 
     gIF.Height = 500; 
     gIF.Width = 700; 
     gIF.ColorReduction = Steema.TeeChart.Export.GIFFormat.GIFColorReduction.GrayScale; 
     gIF.Save(saveFileDialog1.FileName); 
     break;

[VB.Net]

Case 5 
     Dim GIF As Steema.TeeChart.Export.GIFFormat = TChart1.Export.Image.GIF 
     GIF.Height = 500 
     GIF.Width = 700 
     GIF.ColorReduction = Steema.TeeChart.Export.GIFFormat.GIFColorReduction.GrayScale 
     GIF.Save(SaveFileDialog1.FileName)

2.5 PNG

PNG格式保留了GIF格式的許多優(yōu)點(diǎn)，但也提供了超出GIF格式的功能，PNG改進(jìn)了GIF逐步顯示圖像的能力。 也就是說(shuō)，當(dāng)圖像通過(guò)網(wǎng)絡(luò)連接到達(dá)時(shí)，顯示更好和更好的圖像近似值，例

[C#.Net]

case 6: 
     Steema.TeeChart.Export.PNGFormat pNG = tChart1.Export.Image.PNG; 
     pNG.Compression = 100; 
     pNG.GrayScale = true; 
     pNG.Height = 500; 
     pNG.Width = 700; 
     pNG.Save(saveFileDialog1.FileName); 
     break;

[VB.Net]

Case 6 
     Dim PNGf As Steema.TeeChart.Export.PNGFormat = TChart1.Export.Image.PNG 
     PNGf.Compression = 100 
     PNGf.GrayScale = True 
     PNGf.Height = 500 
     PNGf.Width = 700 
     PNGf.Save(SaveFileDialog1.FileName)

2.6 TIFF

TIFF是一種靈活且可擴(kuò)展的格式，受到各種平臺(tái)和圖像處理應(yīng)用程序的支持，例

[C#.Net]

case 7: 
     Steema.TeeChart.Export.TIFFFormat tIFF = tChart1.Export.Image.TIFF; 
     tIFF.Compression = Steema.TeeChart.Export.TIFFFormat.TIFFCompression.LZW; 
     tIFF.Height = 500; 
     tIFF.Width = 700; 
     tIFF.Save(saveFileDialog1.FileName); 
     break;

[VB.Net]

Case 7 
     Dim TIFF As Steema.TeeChart.Export.TIFFFormat = TChart1.Export.Image.TIFF 
     TIFF.Compression = Steema.TeeChart.Export.TIFFFormat.TIFFCompression.LZW 
     TIFF.Height = 500 
     TIFF.Width = 700 
     TIFF.Save(SaveFileDialog1.FileName)

2.7 Adobe Flex/Flash/SWF

TeeChart現(xiàn)在可以導(dǎo)出為Adobe Flex腳本文件（* .mxml），然后可以通過(guò)Flex的免費(fèi)編譯器（mxmlc.exe）進(jìn)行編譯，以創(chuàng)建* .swf（Flash）文件。

（三）導(dǎo)出數(shù)據(jù)

系列數(shù)據(jù)有四種導(dǎo)出格式：

• Text: TextFormat Class
• XML: XMLFormat Class
• HTML: HTMLFormat Class
• Excel: ExcelFormat Class

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，Stream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#.Net]

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> 

（四）TeeChart的'Ten'模板和數(shù)據(jù)導(dǎo)出/導(dǎo)入格式

Ten files

Ten files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)，優(yōu)點(diǎn)：

• 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(shì)。
• 模板的目標(biāo)圖表是“live實(shí)時(shí)”，可以進(jìn)行縮放和滾動(dòng)，并修改其屬性。
• 根據(jù)用戶(hù)的喜好，數(shù)據(jù)可以選擇包含在十個(gè)模板中。

例：

[C#.Net]

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

（五）導(dǎo)入

5.1 將XML導(dǎo)入TeeChart

5.1.1 從TextBox導(dǎo)入XML

[C#.Net]

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(); 

5.1.2 從URL導(dǎo)入XML

[C#.Net]

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

5.2 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Ten文件。

5.3 導(dǎo)入示例

5.3.1 從文件導(dǎo)入

[C#.Net]

tChart1.Import.Template.LoadFileDialog();

[VB.Net]

TChart1.Import.Template.LoadFileDialog()

5.3.2 URl

[C#.Net]

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

[VB.Net]

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

5.3.3 Stream

[C#.Net]

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)

5.4 導(dǎo)入圖表所做更改的效果

As.ten文件時(shí)所做更改的效果僅保存對(duì)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(gè)例子是圖表頁(yè)腳。如果.ten文件未設(shè)置頁(yè)腳并且目標(biāo)圖表具有，則頁(yè)腳將在導(dǎo)入后通過(guò)圖表顯示。如果希望在導(dǎo)入圖表后對(duì)導(dǎo)入圖表進(jìn)行更改可能會(huì)對(duì)所需結(jié)果產(chǎn)生負(fù)面影響，那么可以創(chuàng)建圖表的新實(shí)例，如下例所示：

[C#.Net]

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

5.5 其他數(shù)據(jù)源

有關(guān)從其他數(shù)據(jù)庫(kù)信息源導(dǎo)入數(shù)據(jù)的信息，請(qǐng)參閱數(shù)據(jù)庫(kù)訪問(wèn)教程。