public void BuildLineChart(string fileName, DataTable data, LineChartContext context)
{
LineChartCreator creator = new LineChartCreator();
creator.BuildChart(fileName, data, context);
}
public void BuildChart(string fileName, DataTable data, LineChartContext context)
{
if (data == null || data.Columns.Count == 0)
throw new System.FormatException("There is not data to plot.");
System.Drawing.Color[] colors = ChartHelper.GetColors();
if (data.Columns.Count - 1 > colors.Length)
throw new IndexOutOfRangeException("We don't have enough colors to render this chart.");
using (var targetChart = new Chart()) {
ChartArea mainChartArea = new ChartArea("MainArea");
targetChart.ChartAreas.Add(mainChartArea);
ChartHelper.InitializeChart(targetChart, context.ImageSize);
if (!string.IsNullOrWhiteSpace(context.Title)) {
targetChart.Titles.Add(new Title(context.Title, Docking.Top,
new System.Drawing.Font(context.TitleFontName,
context.TitleFontSize,
System.Drawing.FontStyle.Bold),
context.TitleFontColor));
}
targetChart.DataSource = data;
string xval = data.Columns[0].ToString();
for (int i = 1; i < data.Columns.Count; i++) {
string columnName = data.Columns[i].ColumnName;
targetChart.Series.Add(columnName);
// Using column name as the legend
targetChart.Series[i - 1].Name = columnName;
targetChart.Series[i - 1].LegendText = columnName;
targetChart.Series[i - 1].XValueMember = xval;
targetChart.Series[i - 1].XValueType = ChartHelper.ParseCharValueType(context.XValueType);
targetChart.Series[i - 1].YValueMembers = data.Columns[i].ToString();
targetChart.Series[i - 1].ChartType = SeriesChartType.Line;
targetChart.Series[i - 1].Color = colors[i - 1];
}
System.Drawing.Color lineColor = context.LineColor;
targetChart.ChartAreas[0].AxisX.LineColor =
targetChart.ChartAreas[0].AxisY.LineColor =
targetChart.ChartAreas[0].AxisX.InterlacedColor =
targetChart.ChartAreas[0].AxisY.InterlacedColor =
targetChart.ChartAreas[0].AxisX.MajorGrid.LineColor =
targetChart.ChartAreas[0].AxisY.MajorGrid.LineColor =
targetChart.ChartAreas[0].AxisX.TitleForeColor =
targetChart.ChartAreas[0].AxisY.TitleForeColor =
targetChart.ChartAreas[0].AxisX.MajorTickMark.LineColor =
targetChart.ChartAreas[0].AxisY.MajorTickMark.LineColor = lineColor;
ChartHelper.AddLegend(targetChart, ChartHelper.ParseLegendStyle(context.LegendStyle));
targetChart.DataBind();
targetChart.SaveImage(fileName, ChartImageFormat.Png);
}
}
