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Gets or sets the gradient callback function that the solver invokes periodically in order to obtain gradient information for different variable values.
Assembly: Microsoft.Solver.Foundation (in Microsoft.Solver.Foundation.dll)
The gradient callback function has the following arguments:
The first argument is the INonlinearModel that is being solved.
The second argument is an Int32 that represents the row variable index to be evaluated, which is a goal or a constraint.
The third argument is a ValuesByIndex that contains the current variable values that are accessible by index.
The fourth argument is a Boolean that indicates whether the current call is the first evaluator call with the current variable values.
The fifth argument is a ValuesByIndex object that contains the passed-in gradient values when the function returns.
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.