AJAX :: How To Set X-axis Min And Max Value From Database Table In MSChart Control

Suppose if DB table has x-axis values as below for particular Id: 65    67.5 68.5  70.0 78.5 80.0   81.5 82.5  83.0  83.5  84.0  84.5  85.5  86.5 

Then it should select x-axis Min value as 65 (for that particular Id), in below line: //Chart1.ChartAreas["ChartArea1"].AxisX.Minimum and it should select x-axis Max value as 86.5 (for that particular Id, in below line: //Chart1.ChartAreas["ChartArea1"].AxisX.Maximum.These values differ everytime for different Id. ( particular Id has multiple x-So everytime for particular Id, it should take x-axis Min and Max value from Database.I tried below code, but its not working. (Also this code enables MajorGrid = true dont know how. I had set it Enable = false from code behind.)

string query = "SELECT max(x) from Tables where Param_ID= '" + id + "' and DeletionDate is null";
DataTable dt2 = GetData(query);
Chart1.ChartAreas["ChartArea1"].AxisX.Maximum = Convert.ToDouble(dt2);