[英]How to tchart x-axis date and time control?
我正在使用Teechart版本.Net和VS2005。
日期和時間的圖形類型為X軸,向系列行添加了Y軸。
我不想代表X軸日期和時間的空值。
---------數據表---------------------
----- Teechart x軸顯示器-----------
紅線是光標工具。 我設置“跟隨鼠標= true”的值。 光標工具指示文本的x軸日期和時間值。 顯示不在數據表中的時間。 以下值18:23:49顯示了18:23:50的示例。 我想將數據表的日期和時間表示為x軸值。
my code:
private void TeeChartSet()
{
Steema.TeeChart.Styles.Line line = new Steema.TeeChart.Styles.Line();
TChart1.Series.Add(line);
line.XValues.DateTime = true;
TChart1.Axes.Bottom.Increment = Steema.TeeChart.Utils.DateTimeStep[(int)Steema.TeeChart.DateTimeSteps.OneSecond];
line.Stairs = true;
TChart1.Series[i].XValues.DataMember = "SetTime";
TChart1.Series[i].YValues.DataMember = "Park Brk Pres Sw1";
TChart1.Series[i].DataSource = Datatable;
TChart1.Axes.Bottom.Labels.DateTimeFormat = "HH:mm:ss";
Steema.TeeChart.AxisLabelStyle.PointValue;
}
private void cursor1_Change(object sender, CursorChangeEventArgs e)
{
TChart1.Invalidate();
DateTime Time = DateTime.FromOADate(e.XValue);
sli_CursorTime.Text = "Cursor Time : " + Time.ToString("yyyy-MM-dd HH:mm:ss");
}
private void MakeDt() //Make datatable Sample Code
{
DataTable dt = new DataTable();
dt.Columns.Add("SetTime");
dt.Columns.Add("Park Brk Pres Sw1");
DataRow row;
for (int i = 0; i < 10; i++)
{
row = dt.NewRow();
row["SetTime"] = DateTime.Now.AddSeconds(i * 5);
row["Park Brk Pres Sw1"] = 0;
dt.Rows.Add(row);
}
}
非常感謝您提供額外的信息,它對我們非常有用。 我編寫了代碼,因為您可以使用它來解決您的問題。 為了編寫代碼,我使用了注釋工具,光標工具和序列線,其中僅在注釋工具中顯示了序列點的值。 我也更改了系列的DateTimeFormat。 我添加了一行代碼以Excel格式導出數據值,因為您可以看到更改DateTimeFormat的結果,並且它可以正確的方式工作。
Steema.TeeChart.Tools.CursorTool cursorTool1;
private Steema.TeeChart.Tools.Annotation ann;
private double xval;
private void InitializeChart()
{
tChart1.Aspect.View3D = false;
//Tools
cursorTool1 = new Steema.TeeChart.Tools.CursorTool(tChart1.Chart);
cursorTool1.Style = Steema.TeeChart.Tools.CursorToolStyles.Vertical;
// cursorTool1.Pen.Style = System.Drawing.Drawing2D.DashStyle.Dash;
cursorTool1.FollowMouse = true;
// cursorTool1.OriginalCursor = Cursors.Arrow;
ann = new Steema.TeeChart.Tools.Annotation(tChart1.Chart);
ann.Shape.Pen.Visible = false;
ann.Shape.Shadow.Visible = false;
ann.Shape.ShapeStyle = Steema.TeeChart.Drawing.TextShapeStyle.RoundRectangle;
//Series
Steema.TeeChart.Styles.Line line1 = new Steema.TeeChart.Styles.Line(tChart1.Chart);
line1.XValues.DateTime = true;
line1.DateTimeFormat = "HH:mm:ss";
cursorTool1.Series = line1;
line1.Stairs = true;
line1.XValues.DataMember = "SetTime";
line1.YValues.DataMember = "Park Brk Pres Sw1";
line1.DataSource = GetDataTable();
tChart1.Axes.Bottom.Labels.DateTimeFormat = "HH:mm:ss";
tChart1.Axes.Bottom.Labels.Style = Steema.TeeChart.AxisLabelStyle.PointValue;
tChart1.Export.Data.Excel.Save("C:\\Test1.xls");
//Events
tChart1.AfterDraw += new PaintChartEventHandler(tChart1_AfterDraw);
cursorTool1.Change += new CursorChangeEventHandler(cursorTool1_Change);
tChart1.Draw();
}
//DataTable
private DataTable GetDataTable()
{
DataTable dataTable1 = new DataTable("DataSet");
//Condition to filter
//AddColumns in new Table
DataColumn xval = new DataColumn("SetTime", typeof(DateTime));
DataColumn yval = new DataColumn("Park Brk Pres Sw1", typeof(double));
dataTable1.Columns.Add(xval);
dataTable1.Columns.Add(yval);
DateTime dt = DateTime.Now;
for (int i = 0; i < 10; i++)
{
DataRow newRow = dataTable1.NewRow();
newRow[xval] = dt.AddSeconds(i * 5);
newRow[yval] = 0;
dataTable1.Rows.Add(newRow);
}
return dataTable1;
}
//Calculate Interpolate point
private double InterpolateLineSeries(Steema.TeeChart.Styles.Custom series, int firstindex, int lastindex, double xvalue)
{
int index;
for (index = firstindex; index <= lastindex; index++)
{
if (index == -1 || series.XValues.Value[index] > xvalue) break;
}
// safeguard
if (index < 1) index = 1;
else if (index >= series.Count) index = series.Count - 1;
// y=(y2-y1)/(x2-x1)*(x-x1)+y1
double dx = series.XValues[index] - series.XValues[index - 1];
double dy = series.YValues[index] - series.YValues[index - 1];
if (dx != 0.0) return dy * (xvalue - series.XValues[index - 1]) / dx + series.YValues[index - 1];
else return 0.0;
}
private double InterpolateLineSeries(Steema.TeeChart.Styles.Custom series, double xvalue)
{
return InterpolateLineSeries(series, series.FirstVisibleIndex, series.LastVisibleIndex, xvalue);
}
private void cursorTool1_Change(object sender, Steema.TeeChart.Tools.CursorChangeEventArgs e)
{
xval = e.XValue;
ann.Text = "";
this.Text = e.ValueIndex.ToString();
foreach (Steema.TeeChart.Styles.Series s in tChart1.Series)
{
ann.Text += DateTime.FromOADate(s.XValues[e.ValueIndex]).ToString("HH:mm:ss");
}
}
private void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g)
{
int xs = tChart1.Axes.Bottom.CalcXPosValue(xval);
int ys;
g.Brush.Visible = true;
g.Brush.Solid = true;
for (int i = 0; i < tChart1.Series.Count; i++)
if (tChart1.Series[i] is Steema.TeeChart.Styles.Custom)
{
ys = tChart1.Series[i].GetVertAxis.CalcYPosValue(InterpolateLineSeries(tChart1.Series[i] as Steema.TeeChart.Styles.Custom, xval));
//Draw elipse above cursor tool.
g.Brush.Color = tChart1.Series[i].Color;
//Draw annotation as label above cursor tool.
ann.Top = ys;
ann.Left = xs;
}
}
您能否告訴我們以前的代碼是否可以幫助您解決問題?
希望會有所幫助。
謝謝,
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