好的，这可能有点难以解释。我有一个计算我想要绘制的 X 和 Y 值的方法。此方法纯粹是后端，并在从我的主 GUI 线程调用的 backgroundworker 中运行。
与我的主要表格分开，我有一个只包含一个 zedgraph 和一个股票代码的表格。我使用该组合来显示从我的后台线程中吐出的滚动 X、Y。这很好用，这里一切都很好。
当我单击主 GUI 上的按钮时，后台工作程序关闭，zedgraph 停止更新。这是我的问题开始的地方
当我单击停止按钮时，图表需要保持不变。它这样做很好......如果这是它第一次运行。在所有未来的图上都会发生这种情况：（顶部图像是第一张图，第二张图是第二张图。）
第一个图表在不应该更新时不断更新。我如何防止这种情况发生？有没有办法“关闭”第一个 zedgraph 并阻止它监听新数据？
下面是我的 zedgraph 代码，我很确定问题出在某个地方，而不是我的主要 GUI 代码。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ZedGraph;
namespace RTHERM
{
public partial class Readout : Form
{
// Starting time in milliseconds
public static float Time_old = 0.0f;
public static float Tsurf_old;
public static float Tmidr_old;
public static float Tcent_old;
public static float Tenvi_old;
// Every "redrawInterval" secods plot a new point (if one is available)
public static int redrawInterval;
public int plotRange = 15; // Plot will span "plotRange" minutes
int tickStart = 0;
public Readout()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
//timer1.Equals(0);
GUI gui = new GUI();
GraphPane graph = zedGraph.GraphPane;
graph.Title.Text = GUI.plotTitle;
graph.XAxis.Title.Text = "Time [min]";
graph.YAxis.Title.Text = "Temperature [F]";
graph.Legend.Position = ZedGraph.LegendPos.BottomCenter;
// Save 1200 points. At 50 ms sample rate, this is one minute
// The RollingPointPairList is an efficient storage class that always
// keeps a rolling set of point data without needing to shift any data values
RollingPointPairList surfList = new RollingPointPairList(1200);
//surfList.Clear();
RollingPointPairList midrList = new RollingPointPairList(1200);
//midrList.Clear();
RollingPointPairList centList = new RollingPointPairList(1200);
//centList.Clear();
RollingPointPairList furnList = new RollingPointPairList(1200);
//furnList.Clear();
// Initially, a curve is added with no data points (list is empty)
// Color is blue, and there will be no symbols
LineItem surf = graph.AddCurve("Surface", surfList, Color.DarkBlue, SymbolType.None);
LineItem midr = graph.AddCurve("Mid-Radius", midrList, Color.DarkOliveGreen, SymbolType.None);
LineItem cent = graph.AddCurve("Center", centList, Color.DarkOrange, SymbolType.None);
LineItem furn = graph.AddCurve("Ambient", furnList, Color.Red, SymbolType.None);
surf.Line.Width = 2;
midr.Line.Width = 2;
cent.Line.Width = 2;
furn.Line.Width = 2;
// Check for new data points
timer1.Interval = redrawInterval;
timer1.Enabled = true;
//timer1.Start();
// Just manually control the X axis range so it scrolls continuously
// instead of discrete step-sized jumps
graph.XAxis.Scale.Min = 0;
graph.XAxis.Scale.Max = plotRange;
graph.XAxis.Scale.MinorStep = 1;
graph.XAxis.Scale.MajorStep = 5;
// Scale the axes
zedGraph.AxisChange();
// Save the beginning time for reference
tickStart = Environment.TickCount;
}
// USING A TIMER OBJECT TO UPDATE EVERY FEW MILISECONDS
private void timer1_Tick(object sender, EventArgs e)
{
// Only redraw if we have new information
if (Transfer.TTIME != Time_old)
{
GraphPane graph = this.zedGraph.GraphPane;
// Make sure that the curvelist has at least one curve
if (zedGraph.GraphPane.CurveList.Count <= 0)
return;
// Grab the three lineitems
LineItem surf = this.zedGraph.GraphPane.CurveList[0] as LineItem;
LineItem midr = this.zedGraph.GraphPane.CurveList[1] as LineItem;
LineItem cent = this.zedGraph.GraphPane.CurveList[2] as LineItem;
LineItem furn = this.zedGraph.GraphPane.CurveList[3] as LineItem;
if (surf == null)
return;
// Get the PointPairList
IPointListEdit surfList = surf.Points as IPointListEdit;
IPointListEdit midrList = midr.Points as IPointListEdit;
IPointListEdit centList = cent.Points as IPointListEdit;
IPointListEdit enviList = furn.Points as IPointListEdit;
// If these are null, it means the reference at .Points does not
// support IPointListEdit, so we won't be able to modify it
if (surfList == null || midrList == null || centList == null || enviList == null)
return;
// Time is measured in seconds
double time = (Environment.TickCount - tickStart) / 1000.0;
// ADDING THE NEW DATA POINTS
// format is List.Add(X,Y) Finally something that makes sense!
surfList.Add(Transfer.TTIME, Transfer.TSURF);
midrList.Add(Transfer.TTIME, Transfer.TMIDR);
centList.Add(Transfer.TTIME, Transfer.TCENT);
enviList.Add(Transfer.TTIME, Transfer.TENVI);
// Keep the X scale at a rolling 10 minute interval, with one
// major step between the max X value and the end of the axis
if (GUI.isRunning)
{
Scale xScale = zedGraph.GraphPane.XAxis.Scale;
if (Transfer.TTIME > xScale.Max - xScale.MajorStep)
{
xScale.Max = Transfer.TTIME + xScale.MajorStep;
xScale.Min = xScale.Max - plotRange;
}
}
// Make sure the Y axis is rescaled to accommodate actual data
zedGraph.AxisChange();
// Force a redraw
zedGraph.Invalidate();
}
else return;
}
public void reset()
{
Time_old = 0.0f;
Tsurf_old = 0.0f;
Tmidr_old = 0.0f;
Tcent_old = 0.0f;
Tenvi_old = 0.0f;
}
private void Form1_Resize(object sender, EventArgs e)
{
if (GUI.isRunning)
{
SetSize();
}
}
// Set the size and location of the ZedGraphControl
private void SetSize()
{
// Control is always 10 pixels inset from the client rectangle of the form
Rectangle formRect = this.ClientRectangle;
formRect.Inflate(-10, -10);
if (zedGraph.Size != formRect.Size)
{
zedGraph.Location = formRect.Location;
zedGraph.Size = formRect.Size;
}
}
private void saveGraph_Click(object sender, EventArgs e)
{
GUI.Pause();
zedGraph.DoPrint();
//SaveFileDialog saveDialog = new SaveFileDialog();
//saveDialog.ShowDialog();
}
private void savePlotDialog_FileOk(object sender, CancelEventArgs e)
{
// Get file name.
string name = savePlotDialog.FileName;
zedGraph.MasterPane.GetImage().Save(name);
GUI.Resume();
}
private bool zedGraphControl1_MouseMoveEvent(ZedGraphControl sender, MouseEventArgs e)
{
// Save the mouse location
PointF mousePt = new PointF(e.X, e.Y);
// Find the Chart rect that contains the current mouse location
GraphPane pane = sender.MasterPane.FindChartRect(mousePt);
// If pane is non-null, we have a valid location. Otherwise, the mouse is not
// within any chart rect.
if (pane != null)
{
double x, y;
// Convert the mouse location to X, and Y scale values
pane.ReverseTransform(mousePt, out x, out y);
// Format the status label text
toolStripStatusXY.Text = "(" + x.ToString("f2") + ", " + y.ToString("f2") + ")";
}
else
// If there is no valid data, then clear the status label text
toolStripStatusXY.Text = string.Empty;
// Return false to indicate we have not processed the MouseMoveEvent
// ZedGraphControl should still go ahead and handle it
return false;
}
private void Readout_FormClosed(object sender, FormClosedEventArgs e)
{
}
private void Readout_FormClosing(object sender, FormClosingEventArgs e)
{
//e.Cancel = true;
//WindowState = FormWindowState.Minimized;
}
}
}