Chart - Zoom In to show more precise data
This is easy but it does take a few settings to do the trick:
ChartArea CA = chart1.ChartAreas[0]; // quick reference
CA.AxisX.ScaleView.Zoomable = true;
CA.CursorX.AutoScroll = true;
CA.CursorX.IsUserSelectionEnabled = true;
Now the user can drag the mouse over an area of interest and it will be zoomed in to fill the Chart:
Note the small button on the left of the horizontal scrollbar: This resets the range.
As ever so often with Chart
the problem is the not exactly well structured documentation..
mvoase
Work as a QA Engineer for the Press Association. Previously worked as an SDET for William Hill.
Updated on June 07, 2022Comments
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mvoase about 2 years
So I have a chart at the moment that carries quite a lot of data. This can be seen in the image below:
Basically I want the user to be able to zoom in and see further into the data. As you can tell it is currently carrying a large amount of data already.
I would like the user to be able to zoom and see more precise things.
protected void drawChart() { DataTable dt = new DataTable(); dt.Clear(); foreach (DataGridViewColumn col in dataGridView1.Columns) { dt.Columns.Add(col.HeaderText); } foreach (DataGridViewRow row in dataGridView1.Rows) { DataRow dRow = dt.NewRow(); foreach (DataGridViewCell cell in row.Cells) { dRow[cell.ColumnIndex] = cell.Value; } dt.Rows.Add(dRow); } chart1.DataBind(); chart1.DataSource = dt; chart1.ChartAreas[0].AxisX.IntervalAutoMode = IntervalAutoMode.VariableCount; chart1.ChartAreas[0].AxisX.LabelStyle.Angle = 90; chart1.Series["Series1"].XValueMember = "Date/Time"; chart1.Series["Series1"].YValueMembers = "HeartRate"; chart1.Series["Series2"].ChartType = SeriesChartType.Line; chart1.Series["Series2"].YValueMembers = "Speed"; chart1.Series["Series3"].ChartType = SeriesChartType.Line; chart1.Series["Series3"].YValueMembers = "Cadence"; chart1.Series["Series4"].ChartType = SeriesChartType.Line; chart1.Series["Series4"].YValueMembers = "Altitude"; chart1.Series["Series5"].ChartType = SeriesChartType.Line; chart1.Series["Series5"].YValueMembers = "Pressure"; chart1.Series["Series6"].ChartType = SeriesChartType.Line; chart1.Series["Series6"].YValueMembers = "Power"; chart1.Series["Series1"].LegendText = "Heart Rate"; chart1.Series["Series1"].ToolTip = "Heart Rate:#VALY\nAverage:#AVG\nMinimum:#MIN\nMaximum:#MAX "; chart1.Series["Series2"].LegendText = "Speed"; chart1.Series["Series2"].ToolTip = "Speed(KM/H):#VALY\nAverage:#AVG\nMaximum:#MAX"; chart1.Series["Series3"].LegendText = "Cadence"; chart1.Series["Series3"].ToolTip = "Cadence:#VALY\nAverage:#AVG\nMaximum:#MAX"; chart1.Series["Series4"].LegendText = "Altitude"; chart1.Series["Series4"].ToolTip = "Altitude(KM/H):#VALY\nAverage:#AVG\nMaximum:#MAX"; chart1.Series["Series5"].LegendText = "Pressure"; chart1.Series["Series5"].ToolTip = "Pressure:#VALY\nAverage:#AVG\nMaximum:#MAX"; chart1.Series["Series6"].LegendText = "Power"; chart1.Series["Series6"].ToolTip = "Power:#VALY\nAverage:#AVG\nMaximum:#MAX"; // add the highlight series after databinding!! (**) Series sz = chart1.Series.Add("Interval"); sz.ChartType = SeriesChartType.Point; sz.Color = Color.Red; sz.BorderWidth = 3; foreach (DataPoint dp in chart1.Series[0].Points) { if (dp.YValues[0] == 0) sz.Points.AddXY(dp.XValue, 0); } // allow zooming: (Taw's edit) chart1.Series["Series1"].AxisX.ScaleView.Zoomable = true; chart1.Series["Series1"].CursorX.AutoScroll = true; chart1.Series["Series1"].CursorX.IsUserSelectionEnabled = true; }