Steema Central

Hi

I would like to use the TeeChart control to display a shapefile on a web page. Your map example, however, is based on a Windows form. Consider also that we are generating the jpg for the chart in memory due to server constraints:

Public Class TestChart1
Shared Function Generate() As String
Dim chart As Chart
chart = New Chart()


... more formating statements

Dim tempStream As New MemoryStream()
chart.Export.Image.PNG.Save(tempStream)
Dim ChartName As String = Guid.NewGuid.ToString
HttpContext.Current.Session(ChartName) = tempStream

Return ChartName

End Function
End Class

I would appreciate it if you could indicate which section to replace in this code so that it will work like a map control and allow loading of shp files.

Thanks
Chris

Hi Chris,

Have you checked the ASP.NET demo shipped with TeeChart for .NET v2/v3? Full project can be found at C:\Program Files\Steema Software\TeeChart for .NET v3\TeeChartForNET and maps example at C:\Program Files\Steema Software\TeeChart for .NET v3\TeeChartForNET\Interacting with Charts\Mapping.

Hope this helps!

Hi Narcis

Yes, as I have stated in my posting, I have seen and investigated the Windows form sample that is included with your software. I asked for a code sample that will work with ASP. Please go back to my original posting and read it again carefully.

Thanks
Chris

Narcis

To clarify further, the sample that is included is an ASP project. However the place where the TeeChart is used as a map control is a Windows form. Have a look and you will see what I mean. If I apply the relevant part of the forms code to my VB code behind the ASP forms it does not work. therefore I am asking you to point me to a place where the control is being used an an ASP page. Also, I need to generate the controls jpg in memeory (again, read my oroginal post carefully). Hope that clarifies it more.

Chris

Hi Chris,

The example I mentioned uses WebForms, not WinForms and is the same you can find here.

For saving chart images in memory please read Tutorial 9 - TeeChart and WebChart and ASP.NET, specially the TempChart property - File, Session, Cache or Httphandler section.

Thanks in advance.

Narcis

The link you specify takes me to the ASO .NET Samples. the only entry which is about mapping it the point "Interacting with Charts / Mapping / Interactive Maps". I can see the sample under "View Sample" however when I click on "View C# Code" I get a blank screen. This also happens on my locally installed version of the ASP.NET Samples. Could you please point me to a working example of the TeeChart control in ASP.NET. Also, I would like the example to be in VB.NET not C#.

Thanks
Chris

Hi Chris,

If I understand this correctly the example already works. What doesn't work is the source code link. Anyway, you should find the mapping example sources at C:\Program Files\Steema Software\TeeChart for .NET v3\TeeChartForNET\Interacting with Charts\Mapping.

At the moment we don't have the ASP.NET available in VB.NET. However, VB.NET version of the full features demo is available at C:\Program Files\Steema Software\TeeChart for .NET v3\Examples\DemoProjectVB.