Databind to Microsoft Range Chart with dataTable

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Hi.
I am working on project that base on Asp and I use microsoft chart.
I want to draw gantt chart with range chart control in microsoft chart series.

For most chart I must set 2 column of table for X and Y of chart.
But in range value, the Y Member Get 2 value.

How can I set 2 Columns name for Y value that need to separate value for showing data ?

Gannt chart has a progress property.
How can I set one of my column for progress value

thanks a lot.