Hello Bala,
Bubble charts have a numerical x-axis, so you cannot bind a list of strings to it:
http://demos.telerik.com/aspnet-ajax/htmlchart/examples/charttypes/bubblechart/defaultcs.aspx.
Donut charts are akin to pie charts and do not have axes at all:
http://demos.telerik.com/aspnet-ajax/htmlchart/examples/charttypes/donutchart/defaultcs.aspx.
You can set custom strings to be shown as categories for line, area and column charts. This is explained here:
http://demos.telerik.com/aspnet-ajax/htmlchart/examples/functionality/mixedchartseries/defaultcs.aspx.
Regards,
Marin Bratanov
Telerik
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