Drawing charts on your ASP.Net page by using OWC

Here is the steps that how I draw and put a chart on my ASP.Net page by using Microsoft Office Web Component (OWC):
My environment: VS 2005, MS Office 2003.

1. Adding the reference. Right click on your web project -> select add a reference -> select "COM" tab -> find and add the "Microsoft Office Web Component 11".
   PS: The OWC version is depending on the version of MS Office you are using. I am using Office 2003 so the OWC version will be 11.
2. In your code-behind file, add this

   using Microsoft.Office.Interop.Owc11;

3. Prepare your data source. Here I create a sample data for this demo:

   string CategoryData = "01:00, 02:00, 03:00, 04:00, 05:00, 06:00, 0700, 0800, 0900, 10:00, 11:00, 12:00";
   string ValueData = "2.6, 2.5, 2.4, 2.3, 2.4, 2.5, 2.3, 2.6, 2.8, 3.3, 3.8, 4.2";

4. Adding this method

   private void DrawChart(string CategoryData, string ValueData)
   {
   ChartSpaceClass oChartSpace = new ChartSpaceClass();
   ChChart oChart = oChartSpace.Charts.Add(0);
   
   //Here is the place to set the chart type. I use the Line chart here.
   oChart.Type = ChartChartTypeEnum.chChartTypeLine;
   oChart.Axes[0].HasMajorGridlines = true;
   oChart.Axes[1].HasTitle = true;
   oChart.Axes[1].Title.Caption = "MWH";
   oChart.HasTitle = true;
   oChart.Title.Caption = "Hourly Data";
   
   oChart.SeriesCollection.Add(0);
   //CategoryData is the X axes value
   oChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimCategories, Convert.ToInt32(ChartSpecialDataSourcesEnum.chDataLiteral), CategoryData);
   //ValueData is the Y axes value
   oChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimValues, Convert.ToInt32(ChartSpecialDataSourcesEnum.chDataLiteral), ValueData);
   
   //Export to an image and assign it to the image control. You can change the width and height.
   oChartSpace.ExportPicture(Server.MapPath("~/Common/DPChart.gif"), "GIF", 640, 480);
   //this makes sure you can always get the new image
   Image1.Attributes.Add("src", "Common/DPChart.gif?ts=" + DateTime.Now.ToBinary());
   
   oChart = null;
   oChartSpace = null;
   dt.Dispose();
   }

Here I show some sample charts that drawn by OWC:





You can find the more professional .Net chart component called "ZedGraph". It's FREE, and it comes with source code.

Update:
You must register OWC on the Server in order to use it. If you are using the same version as I am, then go here to download and install it.