/// <summary>Page Load.</summary>
/// <param name="sender">Sender</param>
/// <param name="e">The event arguments.</param>
public void Page_Load
(
object sender,
EventArgs e
)
{
String chartGraphType = null;
String xAxis = null;
String yAxis = null;
DataSet dataSet = null;
UtilityGraphChart.GraphChart
(
ref dataSet,
ref chartGraphType,
ref xAxis,
ref yAxis
);
switch ( chartGraphType )
{
case "Bar":
GraphChartBar
(
dataSet,
xAxis,
yAxis
);
break;
case "Pie":
break;
}//switch ( chartGraphType )
}//Page_Load
}//Page_Load
/// <summary>GraphChartBar.</summary>
/// <param name="dataSet">The dataset.</param>
/// <param name="xAxis">The xAxis.</param>
/// <param name="yAxis">The yAxis.</param>
public static void GraphChartBar
(
DataSet dataSet,
String xAxis,
String yAxis
)
{
int recordNumber = 0;
float yAxisValue = 0;
Bitmap bitmap = null;
Graphics graphics = null;
HttpContext httpContext = HttpContext.Current;
Pen pen = null;
PointF pointFSymbolLeg;
PointF pointFDescriptionLeg;
bitmap = new Bitmap
(
UtilityGraphChart.BitMapPixelsWidth,
UtilityGraphChart.BitMapPixelsHeight
);
graphics = Graphics.FromImage( bitmap );
pen = new Pen(Color.Black, 2);
httpContext.Response.Clear();
/*
Set canvas color.
*/
graphics.Clear(Color.Snow);
/*
Display graph title.
Create point for upper-left corner of drawing.
*/
graphics.DrawString
(
dataSet.Tables[0].TableName,
new Font("Tahoma", 16),
Brushes.Black,
new PointF(0.0F, 0.0F)
);
/*
Display graph legends.
*/
pointFSymbolLeg = new PointF(285, 20);
pointFDescriptionLeg = new PointF(310, 16);
recordNumber = 0;
foreach(DataTable dataTable in dataSet.Tables)
{
foreach(DataRow dataRow in dataTable.Rows)
{
++recordNumber;
graphics.FillRectangle
(
new SolidBrush(UtilityGraphChart.GetColor(recordNumber % 8 )),
pointFSymbolLeg.X,
pointFSymbolLeg.Y,
20,
10
);
graphics.DrawRectangle
(
Pens.Black,
pointFSymbolLeg.X,
pointFSymbolLeg.Y,
20,
10
);
graphics.DrawString
(
System.Convert.ToString( dataRow[xAxis] ),
new Font("Arial", 10),
Brushes.Black,
pointFDescriptionLeg
);
pointFSymbolLeg.Y += 15;
pointFDescriptionLeg.Y += 15;
}//foreach(DataRow dataRow in dataTable.Rows)
}//foreach(DataTable dataTable in dataSet.Tables)
/*
Display bars
*/
recordNumber = 0;
foreach(DataTable dataTable in dataSet.Tables)
{
foreach(DataRow dataRow in dataTable.Rows)
{
++recordNumber;
yAxisValue = (float) Convert.ToDouble( dataRow[yAxis] );
graphics.FillRectangle
(
new SolidBrush(UtilityGraphChart.GetColor(recordNumber % 8 )),
(recordNumber * UtilityGraphChart.XAxisSpaceBetweenBars) + 15,
200 - (yAxisValue * UtilityGraphChart.YAxisScale),
20,
(yAxisValue * UtilityGraphChart.YAxisScale) + 5
);
graphics.DrawRectangle
(
Pens.Black,
(recordNumber * UtilityGraphChart.XAxisSpaceBetweenBars) + 15,
200 - (yAxisValue * UtilityGraphChart.YAxisScale),
20,
(yAxisValue * UtilityGraphChart.YAxisScale) + 5
);
}//foreach(DataRow dataRow in dataTable.Rows)
}//foreach(DataTable dataTable in dataSet.Tables)
graphics.DrawRectangle(pen, 1, 1, 398, 198);
bitmap.Save(httpContext.Response.OutputStream, ImageFormat.Jpeg);
}//GraphChartBar()
