/// <summary>
/// 用LINQ解析条件表达式
/// </summary>
/// <param name="transition"></param>
/// <param name="condition"></param>
/// <returns></returns>
private bool ParseCondition(WfTransition transition, Dictionary <string, string> condition)
{
var expression = ReplaceParameterToValue(transition.condition, condition);
Expression expr = System.Linq.Dynamic.DynamicExpression.Parse(typeof(Boolean), expression);
LambdaExpression lamb = Expression.Lambda(expr);
var result = (Func <bool>)lamb.Compile();
return(result());
}
/// <summary>
/// 是否满足Transition的条件
/// </summary>
/// <param name="transition"></param>
/// <param name="condition"></param>
/// <returns></returns>
private bool IsValidTransition(WfTransition transition, Dictionary <string, string> condition)
{
var isValid = false;
if (string.IsNullOrEmpty(transition.condition))
{
isValid = true;
return(isValid);
}
if (condition == null || condition.Count == 0)
{
return(isValid);
}
isValid = ParseCondition(transition, condition);
return(isValid);
}