ASP.NET - bar chart using asp.net

how to generate bar chart in asp.net c#..................

hello friend,

first of all see the silverlight tutorials,best examples to do this,than,to accomplish this use some graphical feature provided in .net like Create a bitmap image using Bitmap class

FillRectangle() and DrawRectangle() are the two methods, you can use to draw the appropriate graphics

than draw the bar chart as below

private void DrawBars()
{
    float availableXSpace = width - rightPadding -
        leftPadding - Chart.AxisWidth;
    float spacePerItem = availableXSpace / items.Count;
    float spacing = 0F; // 1F;
    spacePerItem -= spacing;

    using (Brush b = new SolidBrush(this.seriesColor))
    {
        for (int i = 0; i < items.Count; i++)
        {
            ChartItem item = items[i];
            PointF itemPoint = ConvertItemToPoint(
                item, i + 1, items.Count);
            RectangleF barRect = new RectangleF(
                itemPoint.X - spacePerItem, itemPoint.Y,
                spacePerItem, height - bottomPadding -
                    itemPoint.Y - Chart.AxisWidth);

            g.FillRectangle(b, barRect);
        }
    }
}

private void DrawArea()
{
    PointF[] newPoints = new PointF[this.points.Length + 2];
    newPoints[0] = new PointF(leftPadding, height -
        bottomPadding - Chart.AxisWidth);
    newPoints[newPoints.Length - 1] = new PointF(width -
        rightPadding, height - bottomPadding - Chart.AxisWidth);
    System.Array.Copy(this.points, 0, newPoints, 1, this.points.Length);

    using (Brush b = new SolidBrush(this.seriesColor))
    {
        g.FillPolygon(b, newPoints);
    }
}

private void DrawLegend()
{
    if (this.legendTitle != null)
    {
        SizeF legendStringSize = g.MeasureString(this.legendTitle,
            this.stdTextFont);
        PointF legendPoint = new PointF(width - Chart.TextPadding -
            legendStringSize.Width, height / 3F);

        using (Brush b = new SolidBrush(this.seriesColor))
        {
            g.FillRectangle(b, legendPoint.X - 8, legendPoint.Y +
                (legendStringSize.Height / 3F), 5, 5);
        }

        g.DrawString(this.legendTitle, this.stdTextFont,
            this.stdTextBrush, legendPoint);
    }
}
Regards
D

Bar chart created in the below example illustrates the profit of a company for each month from January through December.

Data which is to be displayed on X axis and Y axis is stored in ArrayLists, and then the data is read from these ArrayLists for creating the required bar chart.

First, the ArrayLists are populated as follows:

Once the data is populated, the chart can be generated by calling the method DrawBarGraph:

DrawBarGraph("Profits!", aMonths, aProfits)


DrawBarGraph is defined as follows:



This code will generate the bar chart and display it on the screen.