You can find the library of Bortosky google visualization in here. As its home page states its a helper types to serialize System.Data.DataTable objects into Javascript Object Notation for use as a Google DataTable in the Google Visualization APIs.
When you go to one of its issue “JSON new Date output now fails parsing” solution provide by Sha…@babajob.com is correct but the source code mentioned in the download link is not updated with the fix.
So as mentioned in the fix please make below code changes in source code.
In file DateGoogleDataColumn.cs line 33
return string.Format("\"Date({0}, {1}, {2})\"",
d.Year, d.Month - 1, d.Day);
In file DateTimeGoogleDataColumn.cs line 33
return string.Format("\"Date({0}, {1}, {2},
{3}, {4}, {5})\"",
d.Year, d.Month - 1, d.Day,
d.Hour, d.Minute, d.Second);
Enjoy Google Charts!
Vikram Shetty 