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系列活動
TeeChart for .NET制圖控件提供了一套出色的通用組件套件，可滿足無數的制圖要求，也針對重要的垂直領域，例如金融，科學和統計領域。制圖控件提供了一套出色的通用組件套件，可滿足無數的制圖要求，也針對重要的垂直領域，例如金融，科學和統計領域。
前一節介紹了系列事件的一些用法。本節將展示一些其他用途。
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OnClickSeries
你可以使用OnClickSeries事件來獲取關于一個序列的幾乎任何信息(參見章節，訪問序列值)。
這些示例適用于具有日期時間數據的系列，例如這些測試值可用于以下事件示例:
[C#]
private void button1_Click(object sender, System.EventArgs e)
{
Random rnd = new Random();
line1.XValues.DateTime = true;
line1.Pointer.Visible = true;
line1.Add(DateTime.Parse("25/12/2002 10:30:00"),rnd.Next(100),"", Color.Red);
line1.Add(DateTime.Parse("25/12/2002 22:30:00"),rnd.Next(100),"", Color.Red);
line1.Add(DateTime.Parse("26/12/2002 09:20:00"),rnd.Next(100),"", Color.Red);
line1.Add(DateTime.Parse("26/12/2002 23:30:00"),rnd.Next(100),"", Color.Red);
line1.Add(DateTime.Parse("27/12/2002 11:10:00"),rnd.Next(100),"", Color.Red);
line1.Add(DateTime.Parse("27/12/2002 20:15:00"),rnd.Next(100),"", Color.Red);
line1.Add(DateTime.Parse("28/12/2002 08:15:00"),rnd.Next(100),"", Color.Red);
line1.Add(DateTime.Parse("28/12/2002 21:45:00"),rnd.Next(100),"", Color.Red);
line1.Add(DateTime.Parse("29/12/2002 12:45:00"),rnd.Next(100),"", Color.Red);
line1.Add(DateTime.Parse("29/12/2002 22:05:00"),rnd.Next(100),"", Color.Red);
line1.HorizAxis = Steema.TeeChart.Styles.HorizontalAxis.Top;
}
private void tChart1_ClickSeries(object sender, Steema.TeeChart.Styles.Series s, int valueIndex, System.Windows.Forms.MouseEventArgs e)
{
//The below will show the Value of the nearest Point, not the exact Axis value at the clicked X and Y.
MessageBox.Show("Date is: " + DateTime.FromOADate(line1.XValues[valueIndex])
+ " Value is: " + line1.YValues[valueIndex]);
}
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[VB.Net]
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim rnd As New Random()
Line1.XValues.DateTime = True
Line1.Pointer.Visible = True
Line1.Add(DateTime.Parse("25/12/2002 10:30:00"), rnd.Next(100), "", Color.Red)
Line1.Add(DateTime.Parse("25/12/2002 22:30:00"), rnd.Next(100), "", Color.Red)
Line1.Add(DateTime.Parse("26/12/2002 09:20:00"), rnd.Next(100), "", Color.Red)
Line1.Add(DateTime.Parse("26/12/2002 23:30:00"), rnd.Next(100), "", Color.Red)
Line1.Add(DateTime.Parse("27/12/2002 11:10:00"), rnd.Next(100), "", Color.Red)
Line1.Add(DateTime.Parse("27/12/2002 20:15:00"), rnd.Next(100), "", Color.Red)
Line1.Add(DateTime.Parse("28/12/2002 08:15:00"), rnd.Next(100), "", Color.Red)
Line1.Add(DateTime.Parse("28/12/2002 21:45:00"), rnd.Next(100), "", Color.Red)
Line1.Add(DateTime.Parse("29/12/2002 12:45:00"), rnd.Next(100), "", Color.Red)
Line1.Add(DateTime.Parse("29/12/2002 22:05:00"), rnd.Next(100), "", Color.Red)
Line1.HorizAxis = Steema.TeeChart.Styles.HorizontalAxis.Top
End Sub
Private Sub TChart1_ClickSeries(ByVal sender As Object, ByVal s As Steema.TeeChart.Styles.Series, ByVal valueIndex As Integer, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TChart1.ClickSeries
'The below will show the Value of the nearest Point, not the exact Axis value at the clicked X and Y.
MsgBox("Date is: " & DateTime.FromOADate(Line1.XValues(valueIndex)) _
& " Value is: " & Line1.YValues(valueIndex))
End Sub
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OnGetSeriesPointerStyle
對于那些使用TChart指針的系列，你可以使用OnGetSeriesPointer事件訪問和修改指針:
如果該點高于上一個三角形，則繪制上一個三角形;如果該點低于上一個三角形，則繪制下一個三角形，以此類推。
[C#]
private void line1_GetPointerStyle(Steema.TeeChart.Styles.CustomPoint series, Steema.TeeChart.Styles.GetPointerStyleEventArgs e)
{
if(e.ValueIndex > 0)
{
if(line1.YValues[e.ValueIndex] > line1.YValues[e.ValueIndex - 1])
{
e.Style = Steema.TeeChart.Styles.PointerStyles.Triangle;
}
else if(line1.YValues[e.ValueIndex] < line1.YValues[e.ValueIndex - 1])
{
e.Style = Steema.TeeChart.Styles.PointerStyles.DownTriangle;
}
else
{
e.Style = Steema.TeeChart.Styles.PointerStyles.Diamond;
}
}
else
{
e.Style = Steema.TeeChart.Styles.PointerStyles.Diamond;
}
}
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[VB.Net]
Private Sub Line1_GetPointerStyle(ByVal series As Steema.TeeChart.Styles.CustomPoint, ByVal e As Steema.TeeChart.Styles.GetPointerStyleEventArgs) Handles Line1.GetPointerStyle If e.ValueIndex > 0 Then If (Line1.YValues(e.ValueIndex) > Line1.YValues(e.ValueIndex - 1)) Then e.Style = Steema.TeeChart.PointerStyles.Triangle ElseIf (Line1.YValues(e.ValueIndex) < Line1.YValues(e.ValueIndex - 1)) Then e.Style = Steema.TeeChart.Styles.PointerStyles.DownTriangle Else e.Style = Steema.TeeChart.Styles.PointerStyles.Diamond End If Else e.Style = Steema.TeeChart.Styles.PointerStyles.Diamond End If End Sub
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OnGetSeriesMark
使用OnGetSeriesMark事件在運行時修改標記內容。以下代碼根據相對于最后一個的值改變MarkText;
TeeChart支持通過DragMarks工具拖動重疊的標記:
[C#]
private void line1_GetSeriesMark(Steema.TeeChart.Styles.Series series, Steema.TeeChart.Styles.GetSeriesMarkEventArgs e)
{
if(e.ValueIndex > 0)
{
if(line1.YValues[e.ValueIndex] > line1.YValues[e.ValueIndex - 1])
{
e.MarkText = e.MarkText + " (Up)";
}
else if(line1.YValues[e.ValueIndex] < line1.YValues[e.ValueIndex - 1])
{
e.MarkText = e.MarkText + " (Down)";
}
else
{
e.MarkText = e.MarkText + " (No Change)";
}
}
}
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[VB.Net]
Private Sub Line1_GetSeriesMark(ByVal series As Steema.TeeChart.Styles.Series, ByVal e As Steema.TeeChart.Styles.GetSeriesMarkEventArgs) Handles Line1.GetSeriesMark If (e.ValueIndex > 0) Then If (Line1.YValues(e.ValueIndex) > Line1.YValues(e.ValueIndex - 1)) Then e.MarkText = e.MarkText + " (Up)" ElseIf (Line1.YValues(e.ValueIndex) < Line1.YValues(e.ValueIndex - 1)) Then e.MarkText = e.MarkText + " (Down)" End If Else e.MarkText = e.MarkText + " (No Change)" End If End Sub
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最后兩個事件所產生的圖表外觀如下:
如需下載產品TeeChart for NET ，請點擊產品名進入下載頁面
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