如何使用c#设置日期时间图表的最小值和最大值？
我试图在我的windows应用程序中绘制一个每秒钟有实时数据的折线图。为此，我需要为图表设置最小值（0秒）和最大值（10分钟）。10分钟后，最小值为10分钟，最大值为20分钟。所以我必须每次显示10分钟的数据。我需要从一开始就用滚动条显示以前的数据。我尝试了以下代码，但无法设置图表的最小值和最大值。请解决我的问题如何使用c#设置日期时间图表的最小值和最大值？,c#,winforms,mschart,C#,Winforms,Mschart,我试图在我的windows应用程序中绘制一个每秒钟有实时数据的折线图。为此，我需要为图表设置最小值（0秒）和最大值（10分钟）。10分钟后，最小值为10分钟，最大值为20分钟。所以我必须每次显示10分钟的数据。我需要从一开始就用滚动条显示以前的数据。我尝试了以下代码，但无法设置图表的最小值和最大值。请解决我的问题 series1.XValueType = ChartValueType.DateTime; series1.IsXValueIndexed = true; serie
series1.XValueType = ChartValueType.DateTime;
series1.IsXValueIndexed = true;
series1.YAxisType = AxisType.Primary;
series1.ChartType = SeriesChartType.Line;
this.chart1.Series.Add(series1);
series2.XValueType = ChartValueType.DateTime;
series2.IsXValueIndexed = true;
series2.YAxisType = AxisType.Secondary;
series2.ChartType = SeriesChartType.Line;
this.chart1.Series.Add(series2);
chart1.ChartAreas[0].AxisX.LabelStyle.Format = "HH:mm:ss";
chart1.ChartAreas[0].CursorX.IntervalType = DateTimeIntervalType.Seconds;
chart1.ChartAreas[0].CursorX.AutoScroll = true;
chart1.ChartAreas[0].CursorY.AutoScroll = true;
chart1.ChartAreas[0].AxisX.ScrollBar.Size = 15;
chart1.ChartAreas[0].AxisX.ScrollBar.ButtonStyle = ScrollBarButtonStyles.All;
chart1.ChartAreas[0].AxisX.ScrollBar.IsPositionedInside = false;
chart1.ChartAreas[0].AxisX.ScrollBar.Enabled = true;
chart1.ChartAreas[0].AxisX.ScaleView.Zoomable = true;
chart1.ChartAreas[0].AxisY.ScaleView.Zoomable = true;
chart1.ChartAreas[0].AxisY2.ScaleView.Zoomable = true;
chart1.ChartAreas[0].CursorX.IsUserEnabled = true;
chart1.ChartAreas[0].CursorX.IsUserSelectionEnabled = true;
DateTime minValue, maxValue;
minValue = DateTime.Now;
maxValue = minValue.AddSeconds(600);
chart1.ChartAreas[0].AxisX.Minimum = minValue.ToOADate();
chart1.ChartAreas[0].AxisX.Maximum = maxValue.ToOADate();
chart1.ChartAreas[0].AxisX.ScaleView.Zoom(chart1.ChartAreas[0].AxisX.Minimum, chart1.ChartAreas[0].AxisX.Maximum);
微软有一个他们为mscharts开发的示例项目。在使用数据目录中，有一个实时数据部分。他们有一个互动的例子，按照你的要求做。为了方便起见，我复制了下面的代码。希望这能有所帮助
using System.Windows.Forms.DataVisualization.Charting;
...
private Thread addDataRunner;
private Random rand = new Random();
private System.Windows.Forms.DataVisualization.Charting.Chart chart1;
public delegate void AddDataDelegate();
public AddDataDelegate addDataDel;
...
private void RealTimeSample_Load(object sender, System.EventArgs e)
{
// create the Adding Data Thread but do not start until start button clicked
ThreadStart addDataThreadStart = new ThreadStart(AddDataThreadLoop);
addDataRunner = new Thread(addDataThreadStart);
// create a delegate for adding data
addDataDel += new AddDataDelegate(AddData);
}
private void startTrending_Click(object sender, System.EventArgs e)
{
// Disable all controls on the form
startTrending.Enabled = false;
// and only Enable the Stop button
stopTrending.Enabled = true;
// Predefine the viewing area of the chart
minValue = DateTime.Now;
maxValue = minValue.AddSeconds(120);
chart1.ChartAreas[0].AxisX.Minimum = minValue.ToOADate();
chart1.ChartAreas[0].AxisX.Maximum = maxValue.ToOADate();
// Reset number of series in the chart.
chart1.Series.Clear();
// create a line chart series
Series newSeries = new Series( "Series1" );
newSeries.ChartType = SeriesChartType.Line;
newSeries.BorderWidth = 2;
newSeries.Color = Color.OrangeRed;
newSeries.XValueType = ChartValueType.DateTime;
chart1.Series.Add( newSeries );
// start worker threads.
if ( addDataRunner.IsAlive == true )
{
addDataRunner.Resume();
}
else
{
addDataRunner.Start();
}
}
private void stopTrending_Click(object sender, System.EventArgs e)
{
if ( addDataRunner.IsAlive == true )
{
addDataRunner.Suspend();
}
// Enable all controls on the form
startTrending.Enabled = true;
// and only Disable the Stop button
stopTrending.Enabled = false;
}
/// Main loop for the thread that adds data to the chart.
/// The main purpose of this function is to Invoke AddData
/// function every 1000ms (1 second).
private void AddDataThreadLoop()
{
while (true)
{
chart1.Invoke(addDataDel);
Thread.Sleep(1000);
}
}
public void AddData()
{
DateTime timeStamp = DateTime.Now;
foreach ( Series ptSeries in chart1.Series )
{
AddNewPoint( timeStamp, ptSeries );
}
}
/// The AddNewPoint function is called for each series in the chart when
/// new points need to be added. The new point will be placed at specified
/// X axis (Date/Time) position with a Y value in a range +/- 1 from the previous
/// data point's Y value, and not smaller than zero.
public void AddNewPoint( DateTime timeStamp, System.Windows.Forms.DataVisualization.Charting.Series ptSeries )
{
double newVal = 0;
if ( ptSeries.Points.Count > 0 )
{
newVal = ptSeries.Points[ptSeries.Points.Count -1 ].YValues[0] + (( rand.NextDouble() * 2 ) - 1 );
}
if ( newVal < 0 )
newVal = 0;
// Add new data point to its series.
ptSeries.Points.AddXY( timeStamp.ToOADate(), rand.Next(10, 20));
// remove all points from the source series older than 1.5 minutes.
double removeBefore = timeStamp.AddSeconds( (double)(90) * ( -1 )).ToOADate();
//remove oldest values to maintain a constant number of data points
while ( ptSeries.Points[0].XValue < removeBefore )
{
ptSeries.Points.RemoveAt(0);
}
chart1.ChartAreas[0].AxisX.Minimum = ptSeries.Points[0].XValue;
chart1.ChartAreas[0].AxisX.Maximum = DateTime.FromOADate(ptSeries.Points[0].XValue).AddMinutes(2).ToOADate();
chart1.Invalidate();
}
/// Clean up any resources being used.
protected override void Dispose( bool disposing )
{
if ( (addDataRunner.ThreadState & ThreadState.Suspended) == ThreadState.Suspended)
{
addDataRunner.Resume();
}
addDataRunner.Abort();
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
...
使用System.Windows.Forms.DataVisualization.Charting；
...
私有线程addDataRunner；
private Random rand=new Random（）；
private System.Windows.Forms.DataVisualization.Charting.chart1；
公共委托void AddDataDelegate（）；
公共AddDataDelegate addDataDel；
...
私有void RealTimeSample_加载（对象发送方，System.EventArgs e）
{
//创建添加数据线程，但在单击开始按钮之前不要启动
ThreadStart addDataThreadStart=新的ThreadStart（AddDataThreadLoop）；
addDataRunner=新线程（addDataThreadStart）；
//创建用于添加数据的委托
addDataDel+=新的AddDataDelegate（AddData）；
}
private void startTrending_单击（对象发送者，System.EventArgs e）
{
//禁用窗体上的所有控件
startTrending.Enabled=false；
//并且只启用停止按钮
stopTrending.Enabled=true；
//预定义图表的查看区域
minValue=DateTime.Now；
maxValue=minValue.AddSeconds（120）；
chart1.ChartAreas[0].axix.Minimum=minValue.ToOADate（）；
chart1.ChartAreas[0].AxisX.Maximum=maxValue.ToOADate（）；
//重置图表中的系列数。
图1.Series.Clear（）；
//创建折线图系列
系列新闻系列=新系列（“系列1”）；
newSeries.ChartType=SeriesChartType.Line；
newSeries.BorderWidth=2；
newSeries.Color=Color.oranged；
newSeries.XValueType=ChartValueType.DateTime；
图表1.Series.Add（新闻系列）；
//启动辅助线程。
if（addDataRunner.IsAlive==true）
{
addDataRunner.Resume（）；
}
其他的
{
addDataRunner.Start（）；
}
}
私有void stopTrending_单击（对象发送方，System.EventArgs e）
{
if（addDataRunner.IsAlive==true）
{
addDataRunner.Suspend（）；
}
//启用窗体上的所有控件
startTrending.Enabled=true；
//并且只禁用停止按钮
stopTrending.Enabled=false；
}
///向图表中添加数据的线程的主循环。
///此函数的主要目的是调用AddData
///每1000毫秒（1秒）运行一次。
私有void AddDataThreadLoop（）
{
while（true）
{
图表1.调用（addDataDel）；
睡眠（1000）；
}
}
public void AddData（）
{
DateTime timeStamp=DateTime.Now；
foreach（系列图1.系列中的系列）
{
AddNewPoint（时间戳，ptSeries）；
}
}
///在以下情况下，将为图表中的每个系列调用AddNewPoint函数：
///需要添加新的点。新点将放置在指定的位置
///X轴（日期/时间）位置，Y值在上一个值的+/-1范围内
///数据点的Y值，且不小于零。
public void AddNewPoint（DateTime时间戳，System.Windows.Forms.DataVisualization.Charting.Series ptSeries）
{
双newVal=0；
如果（ptSeries.Points.Count>0）
{
newVal=ptSeries.Points[ptSeries.Points.Count-1].yValue[0]+（（rand.NextDouble（）*2）-1）；
}
if（newVal<0）
newVal=0；
//将新数据点添加到其系列中。
ptSeries.Points.AddXY（timeStamp.ToOADate（），rand.Next（10,20））；
//删除源系列中超过1.5分钟的所有点。
double removeBefore=timeStamp.AddSeconds（（double）（90）*（-1））.ToOADate（）；
//删除最旧的值以保持恒定的数据点数量
while（ptSeries.Points[0].XValueusing System.Windows.Forms.DataVisualization.Charting;
...
private Thread addDataRunner;
private Random rand = new Random();
private System.Windows.Forms.DataVisualization.Charting.Chart chart1;
public delegate void AddDataDelegate();
public AddDataDelegate addDataDel;
...
private void RealTimeSample_Load(object sender, System.EventArgs e)
{
// create the Adding Data Thread but do not start until start button clicked
ThreadStart addDataThreadStart = new ThreadStart(AddDataThreadLoop);
addDataRunner = new Thread(addDataThreadStart);
// create a delegate for adding data
addDataDel += new AddDataDelegate(AddData);
}
private void startTrending_Click(object sender, System.EventArgs e)
{
// Disable all controls on the form
startTrending.Enabled = false;
// and only Enable the Stop button
stopTrending.Enabled = true;
// Predefine the viewing area of the chart
minValue = DateTime.Now;
maxValue = minValue.AddSeconds(120);
chart1.ChartAreas[0].AxisX.Minimum = minValue.ToOADate();
chart1.ChartAreas[0].AxisX.Maximum = maxValue.ToOADate();
// Reset number of series in the chart.
chart1.Series.Clear();
// create a line chart series
Series newSeries = new Series( "Series1" );
newSeries.ChartType = SeriesChartType.Line;
newSeries.BorderWidth = 2;
newSeries.Color = Color.OrangeRed;
newSeries.XValueType = ChartValueType.DateTime;
chart1.Series.Add( newSeries );
// start worker threads.
if ( addDataRunner.IsAlive == true )
{
addDataRunner.Resume();
}
else
{
addDataRunner.Start();
}
}
private void stopTrending_Click(object sender, System.EventArgs e)
{
if ( addDataRunner.IsAlive == true )
{
addDataRunner.Suspend();
}
// Enable all controls on the form
startTrending.Enabled = true;
// and only Disable the Stop button
stopTrending.Enabled = false;
}
/// Main loop for the thread that adds data to the chart.
/// The main purpose of this function is to Invoke AddData
/// function every 1000ms (1 second).
private void AddDataThreadLoop()
{
while (true)
{
chart1.Invoke(addDataDel);
Thread.Sleep(1000);
}
}
public void AddData()
{
DateTime timeStamp = DateTime.Now;
foreach ( Series ptSeries in chart1.Series )
{
AddNewPoint( timeStamp, ptSeries );
}
}
/// The AddNewPoint function is called for each series in the chart when
/// new points need to be added. The new point will be placed at specified
/// X axis (Date/Time) position with a Y value in a range +/- 1 from the previous
/// data point's Y value, and not smaller than zero.
public void AddNewPoint( DateTime timeStamp, System.Windows.Forms.DataVisualization.Charting.Series ptSeries )
{
double newVal = 0;
if ( ptSeries.Points.Count > 0 )
{
newVal = ptSeries.Points[ptSeries.Points.Count -1 ].YValues[0] + (( rand.NextDouble() * 2 ) - 1 );
}
if ( newVal < 0 )
newVal = 0;
// Add new data point to its series.
ptSeries.Points.AddXY( timeStamp.ToOADate(), rand.Next(10, 20));
// remove all points from the source series older than 1.5 minutes.
double removeBefore = timeStamp.AddSeconds( (double)(90) * ( -1 )).ToOADate();
//remove oldest values to maintain a constant number of data points
while ( ptSeries.Points[0].XValue < removeBefore )
{
ptSeries.Points.RemoveAt(0);
}
chart1.ChartAreas[0].AxisX.Minimum = ptSeries.Points[0].XValue;
chart1.ChartAreas[0].AxisX.Maximum = DateTime.FromOADate(ptSeries.Points[0].XValue).AddMinutes(2).ToOADate();
chart1.Invalidate();
}
/// Clean up any resources being used.
protected override void Dispose( bool disposing )
{
if ( (addDataRunner.ThreadState & ThreadState.Suspended) == ThreadState.Suspended)
{
addDataRunner.Resume();
}
addDataRunner.Abort();
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
...
使用System.Windows.Forms.DataVisualization.Charting；
...
私有线程addDataRunner；
private Random rand=new Random（）；
private System.Windows.Forms.DataVisualization.Charting.chart1；
公共委托void AddDataDelegate（）；
公共AddDataDelegate addDataDel；
...
私有void RealTimeSample_加载（对象发送方，System.EventArgs e）
{
//创建添加数据线程，但在单击开始按钮之前不要启动
ThreadStart addDataThreadStart=新的ThreadStart（AddDataThreadLoop）；
addDataRunner=新线程（addDataThreadStart）；
//创建用于添加数据的委托
addDataDel+=新的AddDataDelegate（AddData）；
}
private void startTrending_单击（对象发送者，System.EventArgs e）
{
//禁用窗体上的所有控件
startTrending.Enabled=false；
//
if (this.chart1.InvokeRequired)
{
BeginInvoke((Action)(() =>
{
if (!chartState) return;
DateTime now = DateTime.Now;
chart1.ResetAutoValues();
for (int i = 0; i < chart1.Series.Count; i++)
{
if (chart1.Series[i].Points.Count > 0)
{
while (chart1.Series[i].Points[0].XValue < now.AddMinutes(-60).ToOADate())
{
chart1.Series[i].Points.RemoveAt(0);
chart1.ChartAreas[0].AxisX.Minimum = chart1.Series[i].Points[0].XValue;
chart1.ChartAreas[0].AxisX.Maximum = now.AddMinutes(1).ToOADate();
}
}
}
chart1.Series["Sebeke"].Points.AddXY(now.ToOADate(), AnlikSebeke);
chart1.Series["Turbin"].Points.AddXY(now.ToOADate(), AnlikTurbin);
chart1.Series["Tuketim"].Points.AddXY(now.ToOADate(), AnlikTuketim);
chart1.Invalidate();
}));
}