/// <summary>
/// 将DataTable转换为EChart Option
/// </summary>
/// <param name="dtData">DataTable</param>
/// <param name="chartType">Chart 类型：line,bar,pie</param>
/// <param name="Title">Chart Title</param>
/// <param name="subTitle">Chart Sub Title</param>
/// <param name="columnAxis">DataTable中用于作为坐标轴的列名</param>
/// <param name="columnSeries">DataTable中用于作为Series的列名</param>
/// <param name="columnValue">DataTable中用于作为值的列名</param>
/// <param name="stackName">Stack名</param>
/// <param name="chartDirection">Chart 方向</param>
/// <param name="xAxisName">X轴名</param>
/// <param name="xAxisName">Y轴名</param>
/// <returns></returns>
public static ChartOption ToChartOption(this DataTable dtData, ChartType chartType, string Title, string subTitle, string columnAxis, string columnSeries, string columnValue, string stackName, ChartDirection chartDirection, string xAxisName = "", string yAxisName = "")
{
ChartOption option = new ChartOption();
if (string.IsNullOrWhiteSpace(Title) == false)
{
option.title = new Title()
{
text = Title, subtext = subTitle
}
}
;
option.ChartDirection = chartDirection;
option.tooltip = new ToolTip();
option.legend = new Legend();
if (chartType == ChartType.Pie)
{
option.tooltip.trigger = "item";
}
else
{
option.tooltip.formatter = null;
}
option.toolbox = new ToolBox();
dtData.AddToChartOption(option, chartType, columnAxis, columnSeries, columnValue, stackName, xAxisName, yAxisName);
return(option);
}
private static void InitOptionAxisData(ref ChartOption option, List <object> lstAxis)
{
if (option.ChartDirection == ChartDirection.Horizontal)
{
option.yAxis[0].data = lstAxis;
option.yAxis[0].data.AddRange(lstAxis);
option.yAxis[0].data = option.yAxis[0].data.Distinct().ToList();
}
else
{
option.xAxis[0].data = lstAxis;
option.xAxis[0].data.AddRange(lstAxis);
option.xAxis[0].data = option.xAxis[0].data.Distinct().ToList();
}
}
/// <summary>
/// 将DataTable添加到已有EChart Option中
/// </summary>
/// <param name="dtData">DataTable</param>
/// <param name="chartType">Chart 类型：line,bar,pie</param>
/// <param name="columnAxis">DataTable中用于作为坐标轴的列名</param>
/// <param name="columnSeries">DataTable中用于作为Series的列名</param>
/// <param name="columnValue">DataTable中用于作为值的列名</param>
/// <param name="stackName">Stack名</param>
/// <param name="xAxisName">X轴名</param>
/// <param name="xAxisName">Y轴名</param>
/// <returns></returns>
public static ChartOption AddToChartOption(this DataTable dtData, ChartOption option, ChartType chartType, string columnAxis, string columnSeries, string columnValue, string stackName, string xAxisName = "", string yAxisName = "")
{
DataTable dtAxis = dtData.Distinct(columnAxis);
DataTable dtSeries = dtData.Distinct(columnSeries);
List <string> lstAxis = new List <string>();
List <Series> lstSeries = new List <Series>();
List <object> lstData = new List <object>();
int xAxisIndex = 0;
int yAxisIndex = 0;
xAxisIndex = option.xAxis.FindIndex(p => p.name == xAxisName);
xAxisIndex = xAxisIndex == -1 ? option.xAxis.Count : xAxisIndex;
yAxisIndex = option.yAxis.FindIndex(p => p.name == yAxisName);
yAxisIndex = yAxisIndex == -1 ? option.yAxis.Count : yAxisIndex;
//Add New Series
foreach (DataRow drSeies in dtSeries.Rows)
{
Series series = null;
switch (chartType)
{
case ChartType.Line:
if (option.ChartDirection == ChartDirection.Horizontal)
{
series = new LineSeries()
{
name = drSeies[0].ToString(), xAxisIndex = xAxisIndex
};
}
else
{
series = new LineSeries()
{
name = drSeies[0].ToString(), yAxisIndex = yAxisIndex
};
}
break;
case ChartType.Bar:
if (option.ChartDirection == ChartDirection.Horizontal)
{
series = new BarSeries()
{
name = drSeies[0].ToString(), xAxisIndex = xAxisIndex
};
}
else
{
series = new BarSeries()
{
name = drSeies[0].ToString(), yAxisIndex = yAxisIndex
};
}
break;
case ChartType.Pie:
series = new PieSeries()
{
name = drSeies[0].ToString()
};
break;
default:
series = new Series()
{
name = drSeies[0].ToString()
};
break;
}
series.data = new List <object>();
if (string.IsNullOrWhiteSpace(stackName) == false)
{
series.stack = stackName;
}
lstSeries.Add(series);
foreach (DataRow drAxis in dtAxis.Rows)
{
string axis = drAxis[0].ToString();
if (lstAxis.Contains(axis) == false)
{
lstAxis.Add(axis);
}
DataRow[] drData = dtData.Select(string.Format("{0}='{1}' AND {2} = '{3}'", columnAxis, axis, columnSeries, series.name));
if (drData.Length == 0)
{
if (chartType == ChartType.Pie)
{
series.data.Add(new { name = axis, value = 0 });
}
else
{
series.data.Add(0);
}
}
else
{
if (chartType == ChartType.Pie)
{
series.data.Add(new { name = axis, value = drData[0][columnValue] });
}
else
{
series.data.Add(drData[0][columnValue]);
}
}
}
}
if (chartType != ChartType.Pie)
{
InitOptionAxisFrame(ref option, xAxisName, yAxisName, lstAxis.Cast <object>().ToList());
}
if (option.series == null)
{
option.series = new List <Series>();
}
option.series.AddRange(lstSeries);
return(option);
}
private static void InitOptionAxisFrame(ref ChartOption option, string xAxisName, string yAxisName, List <object> lstAxis)
{
if (option.ChartDirection == ChartDirection.Horizontal)
{
if (option.yAxis.Count == 0)
{
option.yAxis.Add(new Axis()
{
type = "category", name = yAxisName, data = lstAxis
});
}
if (option.xAxis.Count == 0)
{
//first yAxis
option.xAxis.Add(new Axis()
{
type = "value", name = xAxisName
});
}
else
{
if (option.xAxis.Where(p => p.name == xAxisName).Count() == 0)
{
//second yAxis
option.xAxis.Add(new Axis()
{
type = "value", name = xAxisName, splitLine = new SplitLine()
{
show = false
}
});
if (option.xAxis.Count > 2)
{
throw new Exception("Count of Axis must be less than 2!");
}
}
}
}
else
{
if (option.xAxis.Count == 0)
{
option.xAxis.Add(new Axis()
{
type = "category", name = xAxisName, data = lstAxis
});
}
if (option.yAxis.Count == 0)
{
//first yAxis
option.yAxis.Add(new Axis()
{
type = "value", name = yAxisName
});
}
else
{
if (option.yAxis.Where(p => p.name == yAxisName).Count() == 0)
{
//second yAxis
option.yAxis.Add(new Axis()
{
type = "value", name = yAxisName, splitLine = new SplitLine()
{
show = false
}
});
if (option.yAxis.Count > 2)
{
throw new Exception("Count of Axis must be less than 2!");
}
}
}
}
}
