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Aspose.Cells allows you to prefix table elements styles with HtmlSaveOptions.table_css_id property. Suppose, you set this property with some value like MyTest_TableCssId, then you will find table elements styles like shown below
table#MyTest_TableCssId
#MyTest_TableCssId tr
#MyTest_TableCssId col
#MyTest_TableCssId br
etc.The following screenshot shows the effect of using HtmlSaveOptions.table_css_id property on output HTML.

The following sample code demonstrates how to make use of HtmlSaveOptions.table_css_id property. Please check the output HTML generated by the code for a reference.
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