Given the solution set of the inequality $ax^{2}-bx+2 > 0$ is $\{x|-\frac{1}{2} < x < \frac{1}{3}\}$, let's analyze the solution step by step.

Since the solution set is between two values, $-\frac{1}{2}$ and $\frac{1}{3}$, we understand that the parabola must open downwards for the values between these two x-values to be greater than zero. This implies $a < 0$.

Next, we know at the roots of the quadratic equation, the value of the quadratic expression is zero. Given that the roots are related to the coefficients $a$ and $b$ through Vieta's formulas, we have:

1. The sum of the roots equals $\frac{b}{a}$.
2. The product of the roots equals $\frac{2}{a}$.

Given the roots are $-\frac{1}{2}$ and $\frac{1}{3}$, we can set up the following equations:

1. $-\frac{1}{2} + \frac{1}{3} = \frac{b}{a}$
2. $-\frac{1}{2} \times \frac{1}{3} = \frac{2}{a}$

Solving these equations:

1. $-\frac{1}{2} + \frac{1}{3} = -\frac{1}{6} = \frac{b}{a}$
2. $-\frac{1}{2} \times \frac{1}{3} = -\frac{1}{6} = \frac{2}{a}$

From equation 2, we can find $a$:

$-\frac{1}{6} = \frac{2}{a} \Rightarrow a = -12$

Substituting $a = -12$ into equation 1 to find $b$:

$-\frac{1}{6} = \frac{b}{-12} \Rightarrow b = 2$

With $a = -12$ and $b = 2$, we can find $a + b$:

$a + b = -12 + 2 = -10$

Therefore, the final answer is $\boxed{-10}$.