[C#] chartのX軸に時間を表示させたい

Question

.NET Framework 4.6にてWindowsFormApplicationを作成しています。

やりたい事
＞Listが保持しているデータをY軸に追加し、自動でX軸に時間経過データとして1秒ごと加算されたラベルを作成してほしい。

現状
＞X軸をHH:mm:ss形式にすることはできた。しかし、データを追加しても00:00:00のままラベルに変化がない。

ソース
＞

C#
//折れ線グラフ
//デフォルトのSeriesをクリア
this.chart1.Series.Clear();
this.chart1.ChartAreas.Clear();
//ChartAreaの追加
this.chart1.ChartAreas.Add(new System.Windows.Forms.DataVisualization.Charting.ChartArea("chart_area"));
//Seriesの追加
const string data1 = "data";
this.chart1.Series.Add(data1);
//折れ線グラフの指定
this.chart1.Series[0].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
//目盛の設定
this.chart1.ChartAreas[0].AxisX.Minimum = DateTime.MinValue.AddSeconds(00).ToOADate();
this.chart1.ChartAreas[0].AxisX.Interval = 1;
this.chart1.ChartAreas[0].AxisX.IntervalType = System.Windows.Forms.DataVisualization.Charting.DateTimeIntervalType.Seconds;
this.chart1.ChartAreas[0].AxisX.IntervalOffsetType = System.Windows.Forms.DataVisualization.Charting.DateTimeIntervalType.Seconds;
this.chart1.Series[0].XValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.Time;
this.chart1.ChartAreas[0].AxisX.LabelStyle.Format = "HH:mm:ss";
//データの追加
for (int i = 0; i < ListA.Count; i++)
{
this.chart1.Series[data1].Points.AddY(ListA[i]);
}

Comments

[退会済みユーザー]

コードは ``` と ``` で囲ってください（``` はバッククォート ３つ）。インデントされて見やすくなるので。

Answer 1

やりたいことが分からないのでハズレかもしれませんが・・・

下の画像（Chart サンプルです）のようなことがしたいのでしょうか？

画像の［C# Source］タブの中にあるソースを以下に貼っておきます。ハズレでしたら失礼しました。回答欄でないと画像やインデントされたコードが貼れないのでご容赦ください。

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 );
}        
...