Thanks for your posting and considering Aspose.Cells.
Here are the list of methods, GET, POST, PUT, DELETE
For this URL, you will use GET method.
Check the red parts in the URL. First is workbook name, second is sheet name and 0 means 1st chart.
Please note, in Aspose.Cells, index starts from 0 not from 1. So if you want to get the image of 5th chart, index will be 4 and if you want to get the image of 3rd chart, index will be 2.
Before, you use the GET method with the URL, you must sign the URL with your AppSID and AppKey.
So after signing, the above URL looks like this
Now you will use this Signed URL with GET method and it will return you image in JPEG format of the first chart in the Sheet1 of your sample excel file.
//Please upload sample.xlsx file in the cloud storage.
strURI = Sign(strURI, m_AppSID, m_AppKey);
//Call Process Command with Signed URI
using(Stream responseStream = ProcessCommand(strURI, “Get”))
//Save responseStream on disk with .jpg extension
Please also download and try the runnable sample C# cloud project
for more help. You must upload your sample excel file in the cloud storage and then change the AppSID and AppKey and also change the output file path to run this project.