internal static bool IsMemberEqualsValueExpression(Expression exp, Type declaringType, string memberName) { if (exp.NodeType != ExpressionType.Equal) { return(false); } BinaryExpression be = (BinaryExpression)exp; // Assert. if (ExpressionTreeHelpers.IsSpecificMemberExpression(be.Left, declaringType, memberName) && ExpressionTreeHelpers.IsSpecificMemberExpression(be.Right, declaringType, memberName)) { throw new Exception("Cannot have 'member' == 'member' in an expression!"); } return(ExpressionTreeHelpers.IsSpecificMemberExpression(be.Left, declaringType, memberName) || ExpressionTreeHelpers.IsSpecificMemberExpression(be.Right, declaringType, memberName)); }
protected override Expression VisitBinary(BinaryExpression be) { if (be.NodeType == ExpressionType.Equal) { if (ExpressionTreeHelpers.IsMemberEqualsValueExpression(be, typeof(Place), "Name")) { locations.Add(ExpressionTreeHelpers.GetValueFromEqualsExpression(be, typeof(Place), "Name")); return(be); } else if (ExpressionTreeHelpers.IsMemberEqualsValueExpression(be, typeof(Place), "State")) { locations.Add(ExpressionTreeHelpers.GetValueFromEqualsExpression(be, typeof(Place), "State")); return(be); } else { return(base.VisitBinary(be)); } } else { return(base.VisitBinary(be)); } }